Answers
Answer:
its D
Explanation:
i just got it correct on a. p. e. x. :)
Related Questions
If you accept the cosmological principle, how can earth be located at the center of the observable universe?
Answers
The Philosophize Naturalis Principia Mathematica by Isaac Newton (1687) is the first work to explicitly state the cosmological principle.
Newton envisioned the Earth as a sphere in orbital motion around the Sun within an empty space that extended equally in all directions to impossibly enormous distances, in contrast to preceding classical or mediaeval cosmologies that saw the Earth as resting at the center of the universe.
The formal definition of the cosmological principle is "Viewed on a sufficiently wide scale, the properties of the cosmos are the same for all observers". This amounts to the firmly philosophical assertion that the cosmos as a whole, and not just the bit we can see, is governed by the same physical rules. In essence, this implies that the universe can be understood and is on scientists' side.
The cosmological principle has two testable consequences, an implicit qualification, and depends on a definition of "observer."
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In a gm two-mode hybrid electric vehicle, when can the vehicle be powered by electric power alone?
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In gm two-mode hybrid electric vehicle, the vehicle can be powered by electric power alone in the first mode. The first mode has a function like a regular full hybrid.
A two-mode vehicle is a hybrid model that functions in two ways. The first mode is fully hybrid. The second mode brings a difference. The second mode performs various functions by adjusting various amounts of engine and motor functions.
In the first mode, with a light load and at low speed, the engine can be powered alone on electric power. In this mode, the engine can be shut down, but all accessories can continue operating on electric power. The hybrid system can restart the engine at any time when required.
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a cart is going around a circular loop, as shown in the figure. the cart moves with the smallest speed necessary to stay in contact with the loop to complete a circular path at point 1. what is the speed of the cart at point 2?
Answers
This cart's speed at point 2 is indicated as √5GR
How fast is it?
This is how far something moves over a predefined or fixed length of time. Although it is the fastest, the for loop is difficult to read. The for each is quick, and iteration may be managed.
gravitational speed, or g.
m = the cart's mass
r = radius
1 speed equals v1.
f1 is centripetal force
f1 = mv1²/R
m1 = mg
mv1²/R = mg
the cross-multiply v1² = gr
v1 = √gr
H = 2R
mgH x mv12/2 mv22/2
2GH + v1² = v2²
2g(2R) + (√gR)² = v2²
4gr + GR = V2²
5GR = v2²
√5GR = v2
As a result, at point 2, the cart's speed is indicated as √5GR
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What forces is used when sliding down a slide?
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Gravity are being pulled down the slide by gravity, but there is also another physics principle at work: friction or resistance. Two factors contribute to friction's force.
What forces are at work when someone slides down a slide?Answer and justification Gravitational and frictional forces may have an impact on a child's motion as they descend a slide.
What forces are at work when an object slides?Contact is a force acting such as the normal force that prevents two things from sliding past one another. Friction moves an object's flat surface in a direction opposite to the normal force, which moves an object perpendicular to its flat surface.
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What is n defined as?
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The Standard International (SI) unit of force is the newton. The letter N is frequently used to shorten the phrase "newton" in physics and engineering documents.
How is N defined mathematically?N, the collection of natural numbers, can be defined in one of two ways: N = {0, 1, 2...} N = (1, 2,...} Unknown or undefined natural numbers are represented by lowercase letters in mathematical equations.
What does algebra's N stand for?N in an equation stands for a particular number, not just any integer. N + 9 = 12, which denotes that N is a number that, when added to 9, must result in the number 12.
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suppose a collection of five batteries is connected as shown in the figure, in which b1 = 4.1 v.
Answers
The question is incomplete I can answered it in general way .
The equivalent emf of the collection will be 15.6 V. A conventional (i.e., non-quantum) field created by moving electric charges is known as an electromagnetic field (sometimes referred to as an EM field or EMF). It is the field that is described by classical electrodynamics (a classical field theory), and it is the classical analogue of the quantum electrodynamics' quantized electromagnetic field tensor (a quantum field theory).
The collection's equivalent emf can be obtained as shown below. The results of the investigation were as follows:
Emf 1 (E₁) = 3.0 V
Emf 2 (E₂) = 4.5 V
Emf 3 (E₃) = 1.5 V
Emf 4 (E₄) = 2.0 V
Emf 5 (E₅) = B₁ = 4.6 V
Equivalent emf (E) = ?
E = E₁ + E₂ + E₃ + E₄ + E₅
E = 3 + 4.5 + 1.5 + 2 + 4.6
E = 15.6 V
Therefore, the equivalent emf would be 15.6 V.
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At what weight does a boat become a ship?
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The water based transport is called a ship when it weighs more than 500 tonnes.
The differences between boat and ship are stated for detailed clarification on the two-
Concerning size, ship is larger than a boat. It can be understood from the fact that boat can be shipped in a ship but ship can not be transported in a boat.
Boats are used in small areas and smaller purposes. Ships are used in seas and oceans for cargo and passenger transport.
Subsequently, based on large size and large medium of transport, the crew members in shop are more than boat. They include engineers, navigators, technicians and other important individuals.
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What is the formula of frequency of a string?
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The frequency of vibration of a string is given by f=2LnmT, where T is tension in the string, L is the length, n is the number of harmonics.
What is a frequencyy?
Frequence is the number of circumstances of a repeating event per unit of time.It's also occasionally appertained to as temporal frequence for clarity and is different from angular frequence.Frequence measured in hertz( Hz), which is equal to one event per second. Period is the time interval between events, so period is the antipode of frequence.For cyclic marvels similar as oscillations, swells, or for exemplifications of simple harmonious stir, the term frequence is defined as the number of cycles or climate per unit time.The conventional symbol for frequence is f; the Greek letter ν( nu) is also used.The period T is the time needed to complete one cycle of oscillation or gyration.To know more about frequency, click the link given below:
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how to run and connect a wire from a receptacle in one room to a switch and receptacle in another room
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To run a wire from a receptacle in one room to a switch and receptacle in another room, you will need to follow these steps:
Turn off the power to the circuit that you will be working on at the main electrical panel.Use a voltage tester to confirm that the power is off.Locate the receptacle in the first room and remove the cover plate.Identify the hot, neutral, and ground wires in the receptacle box. The hot wire is typically black or red, the neutral wire is white, and the ground wire is green or bare copper.Measure the distance from the receptacle to the switch and receptacle in the second room, and add a few feet to allow for any necessary bends or turns.Cut a length of wire that is long enough to reach from the receptacle to the switch and receptacle in the second room.Strip the insulation from the ends of the wire.Connect one end of the wire to the receptacle in the first room by attaching the hot wire to the brass terminal, the neutral wire to the silver terminal, and the ground wire to the green or bare copper terminal.Run the wire through the wall or ceiling to the switch and receptacle in the second room. You may need to use wire staples to secure the wire to the framing members.Locate the switch and receptacle in the second room and remove the cover plates.Identify the hot, neutral, and ground wires in the switch and receptacle boxes.Connect the other end of the wire to the switch and receptacle in the second room by attaching the hot wire to the brass terminal, the neutral wire to the silver terminal, and the ground wire to the green or bare copper terminal.Replace the cover plates on the switch and receptacle in the second room.Turn the power back on at the main electrical panel and test the switch and receptacle to confirm that they are working properly.That electrical work can be dangerous and should only be performed by a qualified electrician. If you are not comfortable or familiar with electrical work, it is recommended that you hire a professional to complete the job for you.
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How many diseases are genetic?
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Rare diseases can also be brought on by genetic problems. Less than 200,000 Americans are afflicted by this group of illnesses. Experts estimate that there could be as many as 7,000 of these illnesses.
What proportion of diseases have a genetic basis?One of the oldest arguments in the scientific world is the nature vs. nurture controversy.
How many genetic disorders affect people?
Single gene illnesses are brought on by flaws in just one specific gene. Over 10,000 human diseases are brought on by a single gene mutation, often known as a change. Nearly all ailments and diseases have a hereditary component, researchers are discovering. Variations, or mutations as they are commonly known, in a single gene are the root cause of some diseases, including sickle cell disease and cystic fibrosis.
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Can solar and wind work together?
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Yes! As long as both receive enough sun or wind to create electricity, you can use both solar panels and wind turbines to charge your battery bank by running through a hybrid charge controller.
Can solar and wind energy be combined?Many renewable energy specialists believe that a tiny "hybrid" electric system that combines home wind and home solar (photovoltaic or PV) technology offers significant benefits over either one alone.
Which two issues do wind and solar energy have?Wind and sunlight are inherently unreliable and energy inefficient. As a result, installing a lot of solar and wind energy equipment on the grid raises the price of electricity production, locks in the price of fossil fuels, and has a negative impact on the environment.
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Researchers are completely certain that which of the following facial expressions is recognised by people of all cultures?
A. Interest
B. Guilt
C. Contempt
D. Surprise
Answers
Surprise is the facial expressions is recognized by people of all cultures.
What is meant by facial expression?A facial expression is made up of one or more movements or facial muscle postures. One disputed theory claims that these motions reveal an individual's emotional condition to onlookers. Nonverbal communication can also take the shape of facial expressions.In addition to humans, most other mammals and several other animal species also use them as a key method of social communication.Humans may express themselves on their faces willingly or involuntarily, and the neurological systems that regulate the expression vary depending on the situation. Voluntary facial expressions frequently have a cortical pathway in the brain and are socially conditioned. On the other hand, it is thought that involuntary facial expressions are intrinsic and go through the subcortical region of the brain.Learn more about facial expression refer to :
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Classify statements about total internal reflection true or fal False Answer Bank When light hits a boundary at less than the critical angle, it will undergo total internal reflection Simple reflection of light off a silvered mirror is more efficient than total internal reflection, so mirrors are often used instead of prisms in optical instruments to minimize light loss. A smaller critical angle means that total internal reflection is more likely to occur. Piber optic cables are a practical application of the phenomenon of total internal reflection.
Answers
In the field of physics, total internal reflection refers to the entire reflection of a beam of light that is traveling through a medium such as water or glass back into the medium itself from the surfaces that surround the medium.
When the angle of incidence is larger than a specific limiting angle, which is referred to as the critical angle, the phenomena will take place. When a ray of light traveling through a medium with a higher index of refraction approaches another medium with an angle of incidence that is greater than the critical angle, a phenomenon known as total internal reflection occurs. In general, this phenomenon takes place at the boundary between two transparent media.
True statements are;
1. A smaller critical angle means the total internal reflection is more likely to occur.
2. Fiber optic cables are practical applications of total internal reflections.
False statements are;
1. When light hits a boundary at a less than the critical angle, it will undergo total internal reflection.
2. Single reflection of light of a silvered mirror is more efficient than total internal reflection so mirrors are often used instead of prisms in optical instruments to minimize light loss.
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What are 3 common uses for non-renewable energy?
Answers
Answer:- electricity, heating, transportation and manufacturing.
Explanation:First lets us know what non-renewable energy is.
Non-renewable energy is energy derived from finite resources that are not replaced quickly enough to keep up with the speed of consumption. For perspective, non-renewable energy sources will not be replenished in our lifetime, or, more accurately, many human lifetimes. Most non-renewable energy sources are fossil fuels such as petroleum and crude oil, coal, and natural gas¬, but nuclear fuel, mainly used to produce electricity, heating, transportation and manufacturing, is also generally classified as nonrenewable.
you fire a bullet from a gun that is 0.981 meters above ground aimed perfectly parallel to the ground. it has an initial velocity of 981 m/s. how long will it take the bullet to reach the ground?
Answers
The time taken for the bullet to reach the ground is 0.447 s
What is free fall?
Free fall is a concept of motion where an object is falling under the force of gravity and is only subjected to the force of gravity. It is experienced by objects that are not subject to any other type of force such as air resistance or drag. Examples of objects in free fall include an object dropped from a certain height, a skydiver in a belly-to-earth position, a spacecraft in orbit, or an object thrown upwards and then falling back down. A free fall can be thought of as a state of weightlessness, since the object is not subject to any other force, and is accelerating at a rate of 9.8 m/s2 (or 32 ft/s2). This acceleration is due to gravity and is known as the acceleration due to gravity.
Height from which the bullet id fired, h = 0.981 m
initial velocity of the bullet, u₁ = 981 m/s
Since it is fired parallel to the ground , the initial velocity u₁ does not have a vertical component
So it will be a free fall
Therefore the time taken to reach ground , t =√(2h/g)
t = √(2 * 0.981 / 9.81)
= √(1/5)
= √0.2
t = 0.447 s
Therefore the time taken for the bullet to reach the ground is 0.447 s
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1. A neutron in a reactor makes an elastic headon collision with the nucleus of an atom initially at rest.
Assume: The mass of the atomic nucleus is
about 11.4 the mass of the neutron.
What fraction of the neutron’s kinetic energy is transferred to the atomic nucleus?
2. If the initial kinetic energy of the neutron is
5.43 × 10−13 J, find its final kinetic energy.
Answer in units of J.
Answers
(a) The fraction of neutron's kinetic energy transferred to the atomic nucleus is 0.088.
(b) The final kinetic energy of the neutron is 4.95 x 10⁻¹³ J.
What is the final velocity of the atom?The final velocity of the atom is calculated by applying the principle of conservation of linear momentum as follows;
initial momentum of the neutron = final momentum of the atom
m₁u₁ = m₂u₂
where;
m₁ is the mass of the neutronu₁ is the initial velocity of the neutronm₂ is the mass of the atomic nucleusu₂ is the final velocity of the atomic nucleusThe mass of the atomic nucleus = 11.4 m₁
u₂ = m₁u₁ / m₂
u₂ = m₁u₁ / (11.4 m₁)
u₂ = 0.088u₁
The initial kinetic energy of the neutron is calculated as;
K.Ei = ¹/₂m₁u₁²
The final kinetic energy of the atomic nucleus is calculated as;
K.Ef = ¹/₂m₂u₂²
K.Ef = ¹/₂(11.4 m₁)(0.088u₁)²
K.Ef = 0.088 (¹/₂m₁u₁²)
K.Ef = 0.088 (K.Ei)
The fraction of neutron's kinetic energy transferred to the atomic nucleus is calculated as;
= 0.088 (K.Ei) / K.Ei
= 0.088
= 8.8 %
The final kinetic energy of the neutron is calculated as follows;
K.E.f (neutron) = (1 - 0.088) x (5.43 x 10⁻¹³ J)
K.E.f (neutron) = 4.95 x 10⁻¹³ J
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What is the formula for calculating electron?
Answers
Q=ne will be the formula used to determine the number of electrons. More details The quantity of energy or electrons that are transferred from one body to another by a variety of modes, such as conduction, induction, etc., is known as an electric charge.
A negatively charged subatomic particle known as an electron can either be free or attached to an atom (not bound). One of the three main types of particles within an atom is an electron that is bonded to it; the other two are protons and neutrons. The nucleus of an atom is made up of electrons, protons, and neutrons together.
By exchanging electrons to form chemical bonds, atoms join together to form molecules and compounds. Knowing the number of electrons attached to each atom is the first step in comprehending the nature of this bonding. You may determine the amount of electrons in a substance based on its chemical formula using information from a periodic chart of the elements and some simple math.
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Part A - Prefixes, Roots, and Suffixes Match these prefixes and suffixes to their meanings. Reset Help oste- The word root means bone. peri- The word root means one that breaks or destroys. hema- The word root means blood. means blood. -clast -blast The word root means around or enclosing. The word root means embryonic or formative cell. Submit Request Answer Part B - Vocabulary Terms Match these vocabulary terms to their meanings. Reset Help hematopoiesis The connective tissue membrane that encloses a bone is the osteoporosis is a disease in which bones lose mass and strength, becoming brittle. osteoblasts Blood cells are formed by the process of periosteum osteoclasts Calcium is released by the action of ,which break down bone matrix. are cells that build bone matrix. Submit Request Answer
Answers
Calcium is released by the action of osteoclasts which break down bone matrix.
The cells known as osteoclasts are responsible for breaking down bone to start the process of normal bone remodeling and for mediating bone loss in pathologic situations by escalating their resorptive activity. They develop in the bone marrow from progenitors in the myeloid/monocyte lineage, which then circulate in the blood. The Howship lacunae, which osteoclasts occupy on the surface of the bone, are assumed to be the result of the osteoclasts' enzymes eroding the bone. The union of many cells produced from blood-circulating monocytes results in osteoclasts. These are derived from the bone marrow in turn.
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Can ballistic stretching be harmful?
Answers
Yes, Ballistic stretching can be harmful if it is not performed properly.
This type of stretching involves bouncing movements, which can place excessive strain on the muscles and connective tissues. This can lead to muscle strains or tears, as well as other injuries. It is important to use caution when performing ballistic stretches and to stop if any pain or discomfort is experienced. It is also recommended to warm up before stretching and to stretch slowly and smoothly, rather than using ballistic movements.
Ballistic stretching can also increase the risk of muscle imbalances and poor posture if it is not balanced with other types of stretching, such as static stretching. It is generally more effective and safer to gradually increase flexibility through regular, consistent stretching rather than trying to force the body to stretch too quickly or aggressively.
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Exercise III-
Given the point M moving such that its coordinates at any instant t are:
x = 2t; y = 5t² +4t where t is in second and x and y are in meters.
1-Find the equation of the trajectory of the point M. What is the nature of this motion?
2- Find the position vector of point M at time t.
3- Find the position of point M at t = 3 s.
4- Determine the velocity vector of point M at any time t. Verify that the magnitude of|||= 2√√25t+20t+5.
5- Find the acceleration vector a and deduce that its magnitude=10m/s².
Answers
1. The equation of trajectory is: y = 5x²/4 +2x; it is equation of parabola.
2. The position vector = 2ti + (5t² +4t) j
3. The position of point M at t = 3 s is: ( 6,57).
4. The magnitude of velocity of point M at any time t is 2√(25t²+20t+5).
5. The magnitude of acceleration is 10m/s².
What is velocity?The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.
coordinates at any instant t are:
x = 2t; y = 5t² +4t
1. equation of trajectory is:
y = 5x²/4 +2x; it is equation of parabola.
2. position vector = 2ti + (5t² +4t) j
3. the position of point M at t = 3 s is: x = 2×3 = 6; y = 5×3² +4×3 = 57; i.e., ( 6,57)
4. the velocity vector of point M at any time t is = 2i + ( 10t +4) j
magnitude of velocity = √( 2² + (10t +4)² = 2√(25t²+20t+5).
5. the acceleration vector is = 10j m/s²
Hence, its magnitude is =10m/s².
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How long will it take for a radioactive sample to reduce 1%?
Answers
Answer:
Hence, the isotope will take about 6.645T years to reduce to 1% of its original value
What are the 3 units for frequency?
Answers
The frequency would have units of cycles/second, waves/second or vibrations/second.
Frequency, in physics, is the number of waves that pass fixed point in unit time; also, the number of cycles or vibrations undergone during one unit of time by a body in periodic motion.
What is frequency?
The definition of frequency says that it is the number of complete cycles of a wave passing through a point per unit time.The SI unit of the frequency is Hertz (Hz).Frequency of a sine wave as the number of complete oscillations made by any wave element per unit time.A frequency is in periodic motion, it has gone through one cycle after passing through a series of events or positions and returning to its original state.To know more about frequency, click the link given below:
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an enclosure has an inside area of 50 m2 , and its inside surface is black and is maintained at a constant temperature. a small opening in the enclosure has an area of 0.01 m2 . the radiant power emitted from this opening is 52 w. what is the temperature of the interior enclosure wall? if the interior surface
Answers
the internal enclosure wall is 539 K degrees in temperature. If a container has a 50 m2 interior space, the interior surface is black, and the container is kept at a constant temperature,
Is a steady temperature preferable?The answer solely depends on how well-insulated your house is. If your property is very well insulated, it is best to leave the heating on at a preset temperature, where thermostat and boiler can easily maintain the temperature because there is little heat loss.
How does Ohm's law define constant temperature?Ohm's law states that temperature will remain constant, hence [heat] = vIt, where t is a constant. Since v and I are directly proportional, increasing v will likewise increase I, increasing v will result in an increase in heat (temperature).
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Identify the highlighted vessel. left coronary artery Oright coronary artery great cardiac vein anterior interventricular artery
Answers
The highlighted vessel given below in the image attached:
left coronary artery right coronary artery great cardiac vein anterior interventricular arteryWhat is the function of the coronary arteries and cardiac veins?
The movement of blood through the blood arteries that nourish the heart muscle is known as coronary circulation (myocardium). The heart muscle receives oxygenated blood from the coronary arteries. After the blood has been deoxygenated, cardiac veins remove it.
The heart muscle receives blood from coronary arteries. The heart muscle need oxygen-rich blood in order to operate, just like all other bodily components do. Blood that lacks oxygen must also be transported away. Outside of the heart, the coronary arteries encircle the organ.
Therefore, Your heart receives blood through the coronary arteries and their branches. In order to pump blood through your heart and the rest of your body, your heart muscles require the oxygen and nutrients found in blood.
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Dominance hierarchies are uncommon among folivores because Group of answer choicesleaves tend to be evenly distributed.individuals must travel far for food sources.one individual monopolizes leaves for feeding.food is clumped together.
Answers
Due to the uniform distribution of leaves, folivores rarely exhibit dominance hierarchies.
What is dominance hierarchies?A dominance hierarchy is a type of social hierarchy that arises when members of a social group interact, to create a ranking system. In social living groups, members are likely to compete for access to limited resources and mating opportunities. Rather than fighting each time they meet, relative rank is established between members of the same se x. Based on repetitive interactions a social order is created that is subject to change each time a dominant animal is challenged by a subordinate one. This hierarchical structure can be observed in many species, including humans.
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what is the net electric potential, in volts, at the point where the 7 nc charge is placed in the drawing below?
Answers
The electric potential of a point charge is V=kQ/r. A scalar is an electric potential, while a vector is an electric field.
The voltage due to a combination of point charges is obtained by adding voltages as integers, whereas the overall electric field is obtained by adding individual fields as vectors. When electrostatic forces are applied, the electric potential at a place in an electric field is the amount of work done transferring a unit positive charge from infinity to that point along any path. Because the work done on the item is equal to mgh, the energy gained by the object Equals mgh, which in this case is the potential energy E, according to the rule of conservation of energy.
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When wood burns, a small amount of ashes is produced and gas is given off. How does this reaction demonstrate the law of conservation of mass?.
Answers
The law of conservation of mass states that matter can neither be created nor destroyed. When wood burns, the mass of the wood is converted into a small amount of ashes and gas. The total mass of the ashes and gas is equal to the mass of the wood before it was burned, demonstrating that the law of conservation of mass holds true.
answered
just now
A ball attached to a string is whirled around in a horizontal circle having a radius r. if the radius of the circle is changed to r/4 and
Answers
A ball is attached to a string that is whirled around in a horizontal circle having the radius of r. If the radius of the circle is changed to r/4 and the same centripetal force is applied by the string, the new speed of the ball is one-half the original speed.
The formula for the centripetal force is
F = mv² / r
where F is the centripetal force
m is the mass of the ball
v is the velocity of the ball
r is the radius of the circular movement
Let us rearrange the equation,
[tex]\displaystyle v = \sqrt{\frac{Fr}{m}[/tex]
If the radius of the circular movement is reduced as r/4, then the velocity becomes,
[tex]\displaystyle v = \sqrt{\frac{Fr}{4m}[/tex]
[tex]\displaystyle v = \frac{1}{2} \sqrt{\frac{Fr}{m}[/tex]
which means that if the radius is reduced by one of forth the original, then the velocity will be reduced by twice the original.
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The complete question is
A ball attached to a string is whirled around in a horizontal circle having a radius of r. If the radius of the circle is changed to r/4 and the same centripetal force is applied by the string, the new speed of the ball is which of the following?
(A) One-quarter the original speed
(B) One-half the original speed
(C) The same as the original speed
(D) Twice the original speed
(E) Four times the original speed
Part A - Prefixes, Roots, and Suffixes Match these prefixes and suffixes to their meanings. Reset Help oste- The word root means bone. peri- The word root means one that breaks or destroys. hema- The word root means blood. means blood. -clast -blast The word root means around or enclosing. The word root means embryonic or formative cell. Submit Request Answer Part B - Vocabulary Terms Match these vocabulary terms to their meanings. Reset Help hematopoiesis The connective tissue membrane that encloses a bone is the osteoporosis is a disease in which bones lose mass and strength, becoming brittle. osteoblasts Blood cells are formed by the process of periosteum osteoclasts Calcium is released by the action of ,which break down bone matrix. are cells that build bone matrix. Submit Request Answer
Answers
a word portion that is added to a root word to alter or modify its meaning; prefixes and suffixes are also considered affixes. combining vowel, word root, suffix, prefix, and suffix.
A root word is a word that has no prefixes or suffixes (a prefix is a string of letters that go at the start of a word; a suffix is a string of letters that go at the end of a word). We can alter the meaning of a root word by adding prefixes and suffixes. For instance, the suffixly is added to the word love to create the word beautiful. While a root can serve as the foundation for a new term, it rarely does so.
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A simple compound microscope provides large magnification by employing
A) a short focal length objective and a short focal length eyepiece.
B) a short focal length objective and a long focal length eyepiece.
C) a long focal length objective and a short focal length eyepiece.
D) a long focal length objective and a long focal length eyepiece.
Answers
A simple compound microscope provides large magnification by employing a short focal length objective and a short focal length eyepiece.
A compound microscope is a high magnification microscope that uses two lenses to compound the level of magnification. The first lens is an objective lens and the second lens is an eyepiece lens.
In compound microscope both lenses are convex lenses. The objective lens has a very short focal length and hence has very high magnifying power (P ∝ 1/f ).
The image formed by the objective lens serves as the object to the eyepiece. The position of the eyepiece is kept such that the image formed by the objective lens is formed within the focal length of the eyepiece.
So, the focal length is short for eyepiece lens also.
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