Calculate the speed for each segment on the graph include the units (m/s). Show your calculations, (such as 4/2= 2 m/s)
a. (t=0-10s)
b. (t=10-15s)
c. (t=15-30s)
d. (t=30-40s)
e. (t=40-55s)
Answers
Answer:
v_A = 6 m/s , v_B = 0 m/s , v_C = - 4 m/s , v_D = -4 m/s , v_E = 2.66 m / s
Explanation:
For this exercise we use the definition of average velocity in each segment
v_average = (x₂-x₁) / Δt
segment A of the graph you take the value of distance and time
x₁ = 0 m t₁ = 0 s
x₂ = 60 m t₂ = 10 s
using the average velocity equation and calculate
v_A = (60-0) / (10-0)
v_A = 6 m / s
Segment B
x₁ = 60m
x₂ = 60 m
since the displacement variation is zero (particle stopped) the velocity is zero
v_B = 0 m / s
Segment C and D
x₁ = 60 m t1 = 15 s
x₂ = -40 m t2 = 40 s
v_C = (-40 -60) / (40 -15)
v_C = - 4 m / s
Segment D
how is the same line
v_D = -4 m / s
Segment E
x₁ = -40 m t₁ = 40 s
x₂ = 0 m t₂ = 55 s
v_E = (0- (-40)) / (55 -40)
v_E = 2.66 m / s
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WILL GIVE BRAINLIEST AND A THANKS TO FIRST CORRECT ANSWER!!!!
Which statements describe processes involved in the accretion of planetesimals and protoplanets? Check all that apply.
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Answer:2 and 4th one
Explanation:
7.
You run from your house to a friend's house that is 3 miles away. You then walk home.
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Answer:
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Answer:
9 is the number of protons in the fluorine atom (atomic number)
Explanation:
Answer:
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Explanation:
A plane flies for 2 hours at a speed of 430 km/hr. How far did the plane travel?
Answers
Answer:
860km
Explanation:
2× 430 = 860km
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i will give brainliest Which of the following structures are present in plant cells but absent in animal cells? Choose 1 answer: (Choice A) A Cell walls (Choice B) B Mitochondria (Choice C) C Cytosol (Choice D) D Golgi bodies
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Answer:
A. cell walls
Explanation:
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How did the atomic theory develop and change
Answers
Explanation:
Early Atomic theory
Although the idea of the atom was first suggested by Democritus in the fourth century BC, his suppositions were not useful in explaining chemical phenomena, because there was no experimental evidence to support them. It was not until the late 1700's that early chemists began to explain chemical behavior in terms of the atom. Joseph Priestly, Antoine Lavoisier, and others set the stage for the foundation of chemistry. They demonstrated that substances could combine to form new materials. It was the English chemist, John Dalton, who put the pieces of the puzzle together and developed an atomic theory in 1803.
Dalton's atomic theory contains five basic assumptions:
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Atoms are indestructible and unchangeable. Atoms of an element cannot be created, destroyed, divided into smaller pieces, or transformed into atoms of another element. Dalton based this hypothesis on the law of conservation of mass as stated by Antoine Lavoisier and others around 1785.
Elements are characterized by the weight of their atoms. Dalton suggested that all atoms of the same element have identical weights. Therefore, every single atom of an element such as oxygen is identical to every other oxygen atom. However, atoms of different elements, such as oxygen and mercury, are different from each other.
In chemical reactions, atoms combine in small, whole-number ratios. Experiments that Dalton and others performed indicated that chemical reactions proceed according to atom to atom ratios which were precise and well-defined.
When elements react, their atoms may combine in more than one whole-number ratio. Dalton used this assumption to explain why the ratios of two elements in various compounds, such as oxygen and nitrogen in nitrogen oxides, differed by multiples of each other.
John Dalton's atomic theory was generally accepted because it explained the laws of conservation of mass, definite proportions, multiple proportions, and other observations. Although exceptions to Dalton's theory are now known, his theory has endured reasonably well, with modifications, throughout the years.
A ruler has a division of 1mm. You use the ruler to measure a piece of paper. You find that it is 7.4 cm wide and 8.3 cm long. What is the area of the piece of paper?
Answers
Answer:
6,142mm²Explanation:
Given the dimension of a paper measured by a ruler as 7.4 cm wide and 8.3 cm long, the area of the paper is expressed using the area for calculating the area of a rectangle as shown;
Area of the piece of paper = Length * Width
Given length = 7.4cm
Length = 74mm (Since 10mm = 1cm)
Width = 8.3cm
Width (in mm) = 83mm
We converted to mm since the ruler used to measure has a division of 1mm.
Substituting the given values into the formula, we will have:
Area of the piece of paper = 74mm * 83mm
Area of the piece of paper = 6,142mm²
Hence, the area of the piece of paper is 6,142mm²
A scientist is trying to identify an unknown cell. He determines that it has a nucleus and lysosomes.
It also contains a cell membrane, but does not have a cell wall. What type of cell is the scientist most likely looking at?
Choose 1 answer:
(Choice A) A Animal cell
(Choice B) B Fungal cell
(Choice C) C Plant cell
(Choice D) D Bacteria
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Answer:
Choice A) A Animal cell
Explanation:
Answer:
A.
Explanation:
does increase in length affect period T?
Answers
Yes,increase in length affects period T.
how does this explain the action of a bullet fired from a gun.
Answers
Answer:
When a bullet is fired from a gun, the gun exerts a force on the bullet in the forward direction. This is force is called as the action force. The bullet also exerts an equal and opposite force on the gun in the backward direction. Therefore a gun recoils when a bullet is fired from it.
Which title best fits Rahma's note
Rahma took these notes on a process involving the
movement of molecules, but she forgot to title them.
-Causes molecules to move until they are evenly
distributed
-Moves from high concentration to low
concentration
-Has no need for added energy
-Can occur with or without a membrane being
present
Active Transport in Cells
O Passive Transport in Cells
o Osmosis
O Diffusion
FIRST ANSWER GETS BRAINIEST
Answers
Answer:
diffusion is the answer.
Answer:diffusion
Explanation: it right
it is strong elastic and light .it is lutrous and easy to wash. so it become very popular for making clothes
Answers
Answer:
Nylon fibres
Explanation:
Nylon fibres are synthetic polymers made of repeating units linked by amide links. It is a thermoplastic silky material which can be remoulded in any shape.
Nylon fibres have the property of strong elastic and light in weight that is why used for making ropes, combat uniforms, and parachutes. Nylon Fibres are also lustrous and easy to wash so widely used in textile industry for making swimwear, track pants, shorts, and draperies.
Hence, the correct answer is "Nylon fibres".
Dr. James hypothesizes that his patient, Jacob, misbehaves in class because it allows him to get attention from his
peers.
Which perspective BEST fits Dr. James beliefs about Jacob's actions?
Answers
Answer:
Hey there!
The answer would be a Behavioral perspective.
Let me know if this helps :)
An object moves, along a line,from point A to B to C and then back to B
again as shown in the figure below in half an hour.
a) find the average speed of the moving object in km/hr.
b) find the magnitude of the average velocity of the object in km/hr
help me pleaseddddd!!!
Answers
Answer:
a). Average speed = 26 km per hour
b). Average velocity = 10 km per hour
Explanation:
a). Distance between A to B = 5 km
Distance between B to C = 4 km
Total distance traveled between A to B to C and then back to B
= 5 + 4 + 4
= 13 km
Time taken to cover this distance of 13 km = [tex]\frac{1}{2}[/tex] an hour
Therefore, average speed during this trip = [tex]\frac{13}{\frac{1}{2}}[/tex]
= 26 km per hour
b). Average velocity = [tex]\frac{\text{Displacement}}{\text{Duration}}[/tex]
Displacement = (Distance between A to B) + (Distance traveled between B to C) - (Distance traveled from C to B)
= 5 + 4 - 4
= 5 km towards A
Average velocity = [tex]\frac{5}{\frac{1}{2}}[/tex]
= 10 km per hour
mark as brain list answer
How many atoms of oxygen in the chemical fomula 2ca(cio2)2?
Answers
Explanation:
there are 8 atoms of oxygen
Acceleration is the change of velocity over some
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Answers
A football coach walks 18 meters westward, then 12 meters
eastward, then 28 meters westward, and finally 14 meters
eastward.
Answers
Answer:
Displacement = 20
Direction = westward
Explanation:
Given that a football coach walks 18 meters westward, then 12 meterseastward, then 28 meters westward, and finally 14 meters
eastward.
To calculate the displacement,
Let eastward = negative
Westward = positive
Displacement = 18 - 12 + 28 - 14
Displacement = 46 - 26
displacement = 20 metre
Since the answer is positive, the direction is westward.
A farmers field , which are close to a stream has experienced a lot of runoff. One possible effect of the run off is that the stream will have a decreased level of fertilizers from the field
Answers
Answer:
This statement is false.
Explanation:
If the farmers field is close to the stream, and has experienced a lot of runoff, the runoff will carry chemicals from the farm into the stream, which includes fertilizers among other chemicals. This runoff into the stream will not lead to a decrease in the level of fertilizers in the stream. Therefore, one of the effect of this cannot be a decrease in the level of fertilizers from the field.
What forces come in pairs?
Answers
Answer:
Newton's Third Law of Motion
Explanation:
it explains that forces always come in action-reaction pairs. The Third Law states that for every action force, there is an equal and opposite reaction force
Answer:
newtons third law of motion
Explanation:
newtons third law of motion explains that forces always come in action-reaction pairs
PLEASE ANSWER THIS WORKSHEET ITS DUE TODAY WILL GIVE BRAINLIEST BALANCED AND UNBALANCED WORKSHEET
Answers
Answer:B. NET force: 2 resultant motion: left
ItsOniiSama avatar
C. Net force: 3 Resultant motion: Left
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D. Net Force: 7 Resultant motion: right
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E. Net Force:0 resultant motion: NO MOTION
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F. NET Force: 3 resultant motion: Down
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G. NET FORCE: 10 resultant motion: up
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H. Net force: 3 Resultant motion: left
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I. Net force: 50 Resultant motion: right
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J. NET FORCE: 75 Resultant motion: down
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K. Net force :200 Resultant motion: Right
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L. Net force: 0 resultant motion:No motion
Explanation:
a kayaker moves 32 meters northward then 6 meters southward finally 24 meters northward
Answers
Answer:
50 metres.
Explanation:
Given that a kayaker moves 32 meters northward then 6 meters southward finally 24 meters northward
To calculate the displacement, let assume that
Northward = positive
Southward = negative
Displacement = 32 - 6 + 24
Displacement = 56 - 6
Displacement = 50 metres
The direction of the displacement will be northward.
While the distance will be:
Distance = 32 + 6 + 24 = 62 metres
There are two cars moving at a constant speed. Car A is moving constantly at 5 m/s on a straight path. Car B is moving constantly at 5 m/s on a path with a deep curve. In which driving situation is the car demonstrating acceleration.
Answers
Answer:
The car moving with constant speed on the path with a deep curve experiences an acceleration towards the center of the curve.
Explanation:
Acceleration is the rate of change of velocity with time. A velocity has both magnitude and direction, and a change in either or both of the magnitude and the direction can produce an acceleration on the car. The car on the curved path experiences a change in the direction of travel along the path. This changes in direction at every point on the curve puts an acceleration on the car towards the center of the curve.
HELP!!! IM BEING TIMED AND I RLLY NEED HELP
Answers
Answer:
4.3446× 10^6
3.2156305×10^3
7.68841×10^-6
1.2153698×10^1
9.5677734
Explanation:
Which of the following is an example of a chemical property? Density Solubility Flammability Magnetism
Answers
Answer:
Flammability.
Explanation:
I took the test.
Rhonda watched a video taken by a camera that was lifted into the upper atmosphere by a weather balloon. She saw the balloon pop when it reached a certain height. Afterward, Rhonda wondered what effect the air pressure at high altitudes has on the volume of gas in balloons. What scientific practice is Rhonda performing? asking a question providing explanations communicating results performing an investigation
Answers
Answer:
asking a question
Explanation:
I am the distance between waves what am l
Answers
Answer:
My answer to the question is Wavelength
Answer:
Wavelength
Explanation:
Since this riddle is talking about “Distances”, wavelength is the distance between the crest of waves. This riddle and wavelength is similar... so I’m guessing the answer should be wavelength.
Therefore your answer would be Wavelength.
Hope this was helpful! :)
Brainliest would be highly appreciated! Thanks! :)
if the
D=19.3g/cm^3
v= 1.61 cm^3 what is the mass
Answers
Answer:
Mass=DV
=19.3g/cm^3 ×1.61cm^3
=31.266g
Explanation:
Mass is the product of an objects density and the space it occupies (volume)
potential energy is sometimes called?
Answers
Answer:
it can be called PE or sometimes, there are equations which you can use the letter U.
Explanation:
Answer:
STORED ENERGY
Explanation:
a student places a 13 gram piece of quartz in a graduated cylinder. the water level rises from 30mL to 35mL. what is the density of the quartz
Answers
Answer:
2.6 g/cubic centimeter
Explanation:
Given :
Weight of the quartz = 13 gram
Original level of water = 30mL
Level of water after quartz was is placed inside the cylinder = 35 mL
Therefore rise in water = 35 - 30 = 5 mL
We known that 1 mL = 1 cubic centimeter
And density = mass / volume
Therefore, density of the quartz is = 13/5
= 2.6 g/ cubic centimeter
Newton's Laws of Motion and Newton's Law of Gravity explain why?
a) the Earth moves around (orbits) the Sun.
b) the Moon moves around Earth
c) an apple from a tree falls down to ground (as opposed to "rising up into the sky")
d) all of the above
Answers
Answer:
D all of the above
Explanation:
This is because newtons laws of motion explains movement of a body due to a force applied while that of gravity explains motion of a body under gravity and this captures a, b, and c
All the given options are following the Newton's laws of motion and Newton's law of gravity separately. All of the above options are correct. Hence, option (d) is correct.
The given problem is based upon the Newton's law of motion as well as Newton's law of gravity. So let us analyze each of the given cases as:
(a)
The Earth moves around the Sun : This statement follows the Newton's first law of motion, which says that an object will continue its state of motion, until any external force is being applied on the object. Since, Earth is offered with no net force. Therefore, Newton's law is applicable.
(b)
Moon movers around Earth: This statement also follows the above explanation for the Newton's first law. Which makes moon to revolve around the Earth on an account of no net force. Hence, it will continue its circular motion and hence Newton's law of motion is followed.
(c)
An apple falls from a tree: This statement is based on Newton's law of gravity, which says that every particle in the universe attracts other particles such that the force of attraction is directly proportional to the product of their masses and inversely proportional to square of distance between them. Since, Earth has more mass than apply, therefore Earth will attract the apple downwards.
Thus, we can conclude that all the given options are following the Newton's laws of motion and Newton's law of gravity separately. All of the above options are correct. Hence, option (d) is correct.
Learn more about the Newton's laws of motion here:
https://brainly.com/question/17366362