define s.i unit of force explanation
◈ As per newton's second law of motion, Force is defined as the product of mass and acceleration[tex].[/tex]
Mathematically,
[tex]\dag\:\boxed{\bf{\purple{F=ma}}}[/tex]
Unit of mass : kg
Unit of acceleration : m/s²
Therefore,
Unit of force ➠ kg m/s²
SI unit : N (newton) or kg m/s²
Car A of mass 1500 kg travelling at 25 m/s collides with another car B of mass 1000 kg travelling at 15 m/s in the same direction. After collision, the velocity of car A becomes 20 m/s. Calculate the velocity of car B after collision.
Answer:
Apparently this has been asked a few years ago, so I copied this answer from deepikakvvk06 - - all credit goes to them!
velocity of car 'B' after collision is 22.5m/s. //it's a conservation of momentum question
Explanation:
Let ,
mass = m
initial velocity = u
final velocity = v
here ,
m₁= 1500 kg
m₂=1000 kg
u₁ = 25 m/s
u₂ = 15 m/s
v₁ = 20 m/s
we have to find v₂ !!
v₂ is the velocity after collision
Here is a formula relating the values given ,
m₁u₁+m₂u₂ = m₁v₁ + m₂+v₂
m₁u₁+m₂u₂ = 1500 × 25 + 1000 ×15
= 37500 + 15000
= 52500
m₁v₁ + m₂+v₂ = 1500 × 20 + 1000 × v₂
= 30000 + 1000v₂
m₁u₁+m₂u₂ = m₁v₁ + m₂+v₂
52500 = 3000 + 1000v₂
1000v₂ = 52500 - 30000
1000 v₂ = 22500
v₂ = 22500/1000
= 22.5 m/s
Thus, velocity of car 'B' after collision is 22.5m/s.
Help me! I need to know this for my Veterinarian unit in class. Why do cats hate water?
Another reason why cats hate water is attributed to their history. There is not much in a cat's background to recommend them for successful interactions with bodies of water, be it small or big. Cat's ancestors lived in dry arid places which means rivers or oceans weren't obstacles they had to face.
Hope this helps:)
Ohnny walks 900 meters to the store to buy a candy bar. He then walks back home. His total trip took him 30 minutes. What was his average speed? 0 points 1 m/s 10 m/s 30 m/s 27,000 m/s
Answer:
Average speed = 1 m/s
Explanation:
Given that,
Ohnny walks 900 meters to the store to buy a candy bar. He then walks back home. It would mean that the total distance covered by him is 900 m + 900 m = 1800 m
His total trip took him 30 minutes or 1800 seconds
We need to find the average speed. It is equal to the total distance divided by the total time taken. So,
[tex]v=\dfrac{1800\ m}{1800\ s}\\\\v=1\ m/s[/tex]
So, his average speed is 1 m/s.
A person walks first at a constant speed of 4.90 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 3.05 m/s.A) What is her average speed over the entire trip?
B) What is her average velocity over the entire trip?
Answer:
A.) 3.975 m/s
B.) 0.925 m/s
Explanation:
Given that a person walks first at a constant speed of 4.90 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 3.05 m/s.
A) What is her average speed over the entire trip?
The average speed = (4.90 + 3.05)/2
Average speed = 7.95/2
Average speed = 3.975 m/s
B) What is her average velocity over the entire trip?
Since velocity is a vector quantity, that is, we consider both the magnitude and direction
Average velocity = ( 4.90 - 3.05)/2
Average velocity = 1.85/2
Average velocity = 0.925 m/s
13. A chemical costs $5.25 per pound. What would be the cost of 10.0 kg of the chemical?
Answer:
$ 115.76
Explanation:
From the question given above:
1 pound of a chemical cost $ 5.25
To obtain the cost of 10 Kg of the compound, we must convert 10Kg to pound. This can be obtained as follow:
1 Kg = 2.205 pound
Therefore,
10 Kg = 10 Kg / 1 Kg × 2.205 pound
10 Kg = 22.05 pound
Therefore, 10 Kg is equivalent to 22.05 pounds
Finally, we shall determine the cost of 22.05 pounds as follow:
1 pound of a chemical cost $ 5.25.
Therefore, 22.05 pounds of the chemical will cost =
22.05 pound / 1 pound × $5.25
= $ 115.76
Therefore, 10 Kg (i.e 22.05 pound) of the chemical cost $ 115.76
If the wave speed stays the same, which of the following decreases as the frequency increases?
Answer:yes
Explanation:
The news media, such as newspapers and television stations, carry current events worldwide. Explain how the way news travels is similar to the way a wave travels.
Answer:
A simile can be established with the news, where the fact that occurs is the matter of has some type of oscillation or disturbance, which occurs somewhere and is there, the news is the wave that carries the information of this fact the energy of the same to all points, therefore it is equivalent to a traveling wave.
Explanation:
Traveling waves are disturbances of the medium that are transmitted with a constant speed, where matter is subjected to oscillations around its equilibrium point, transporting only energy.
A simile can be established with the news, where the fact that occurs is the matter of has some type of oscillation or disturbance, which occurs somewhere and is there, the news is the wave that carries the information of this fact the energy of the same to all points, therefore it is equivalent to a traveling wave.
The news is the wave that carries the information of this fact and the energy of the same to all points, making it equivalent to a traveling wave.
What is a wave?A wave is a phenomenon that flows across a material medium without leaving any lasting mark. Mechanical or electromagnetic waves can be used to classify them.
Transverse and longitudinal are the two main forms.
The wave can be compared in the form of news as
The news is the wave that carries the information of this fact and the energy of the same to all points, making it equivalent to traveling. wave.
Traveling waves are medium disturbances that are conveyed at a constant pace, where matter oscillates around its equilibrium point, transferring only energy.
A parallel may be drawn with the news, where the fact that occurs is the issue of having some sort of oscillation or disturbance.
Hence the news is compared with the help by the help of energy and information.
To learn more about the wave refer to the link;
brainly.com/question/3004869
What's the main reason why people use graphs
True or False: You walk across a carpet and accumulate a net negative charge on the soles of your shoes. When you touch your sister with your finger and give her a small zap, the charge that accumulated on your finger is due to charging by contact.
Answer:
True
Explanation:
Charging by conduction occurs when a charged conductor comes in contact with an uncharged conductor, leading to the sharing of charges between both conductors. Contact charging leads to a sharing and distribution of the same type of charges on the two conductors.
In this case, your entire body is charged by the sole of your feet coming in contact with the charged carpet on the floor, leading to a charge buildup all over your body.
What is the importance of Scientific Notation and Significant Figures?
Answer:
they're important because they simplify the results of the comparison
Explain why written communication in science is important. I’ll give brainlest!!!!!!! Help me
The what’s the difference does it mean velocity and vector Quantity is the same
Answer:
No they are totally different...
Velocity is displacement/time. while vector is both magnitude and direction.....
Velocity is a vector quantity because it has both magnitude and direction
the pressure of gas is 13.6 CM of HG what does this mean
Answer:
it means it has pressure of 13.6 CM mercury on an area
Which of the following is the primary function of the nucleus? Choose 1 answer: Choose 1 answer: (Choice A) A Breaking down unnecessary materials (Choice B) B Absorbing sunlight (Choice C) C Producing ATP for the cell (Choice D) D Storing genetic material
Answer:
D) D Storing genetic material
Explanation:
Answer:
D) D Storing genetic material
Explanation:
student is given a rock that is known to have a mass of 436.8 grams. She measures the mass of the rock three different times with the following results: 460.9 g, 461.4g, 459.0 g. Calculate the percent error of the student.
Given :
Actual mass , [tex]m_e=436.8\ g[/tex] .
Three observations 460.9 g, 461.4 g, 459.0 g .
To Find :
The percent error of the student.
Solution :
Percent error is given by :
[tex]\%error=\sum \dfrac{|approx\ value -actual\ value |}{exact\ value}\times 100\\\\\%error=\dfrac{|460.9-436.8|+|461.4-436.8|+|459-436.8|}{436.8}\times 100\\\\\%error=\dfrac{70.9}{436.8}\times 100\\\\\%error=16.23\%[/tex]
Therefore , the percent error of the student is 16.23 % .
Hence , this is the required solution .
Which of these animals would be measured to have the most mass? an elephant a goldfish a dog a fox
Answer:
An elephant.
Explanation:
The amount of matter contained inside a body is called its mass. It is independent of the location of the object. It remains the same always.
Out of the four options we need to tell which animals would be measured to have the most mass. It is very clear that, an elephant has most mass. It is very huge in size of three other animals.
Hence, the correct option is (A).
Answer:
I think its a Elephant
Explanation:
what is the dependent variable
Answer:
a variable (often denoted by y) whose value depends on that of another.
6. Explain what it means to have your hypothesis “refuted".
Answer:
Your hypothesis would be proven wrong.
Explanation:
To have a hypothesis be refuted, your hypothesis would be able to be proven wrong. A hypothesis has to be able to be supported and refuted, or proven wrong.
A transmitter produces radio waves of wavelength 1500m. It takes the waves 0.025s to travel from transmitter to radio receiver.
What is the distance between the radio transmitter and the receiver?
A) 5 × 10³ m
B) 2 × 10⁵ m
C) 7.5 × 10⁶ m
D) 1.1 × 10¹⁰ m
Answer:
[tex]7.5 \times 10 {}^{6} [/tex]
Explanation:
Speed of electromagnetic waves=
[tex]3 \times 10 {}^{8} ms[/tex]
m/s
[tex] = 3 \times 10 {}^{8} ms \times 0.025[/tex]
[tex] = 3 \times 10 {}^{8} \times \frac{1}{40} [/tex]
[tex] = 7.5 \times 10 {}^{6} m[/tex]
For this car, predict the shape of a graph that shows distance (x) versus time (t). Note that time is the independent variable and will be on the bottom axis.
The slope of a linear position graph tells us the blank of the object
Answer:
velocity of the object
Explanation:
For an object moving at a constant acceleration, we would expect to see a position graph with a curved shape and a velocity graph with a straight shape.
The slope of a linear position graph tells us the velocity of the object.
What is velocity?In physics, velocity is the rate of change of an object's position with respect to time. It is a vector quantity, meaning that it has both magnitude and direction. The magnitude of velocity is called speed.
The slope of a linear position graph is calculated by dividing the change in position by the change in time. The units of slope are meters per second (m/s) or feet per second (ft/s).
A positive slope indicates that the object is moving to the right, while a negative slope indicates that the object is moving to the left. The steeper the slope, the faster the object is moving.
Find out more on linear position graph here: https://brainly.com/question/28676522
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A car traveling at 26.8m/s hits the brakes to slow down before turning into a neighborhood. Determine how fast it is going after slowing down at a rate of -8.2m/s2 for 14.3seconds.
Answer:
The speed of the car after the break was applied is 90.46 m/s
Explanation:
Given;
initial velocity of the car, u = 26.8 m/s
accelertation of the car, a = -8.2 m/s²
time of motion, t = 14.3 s
final velocity, v = ?
Apply the following kinematic equation;
v = u + at
v = 26.8 + (-8.2 x 14.3)
v = 26.8 - 117.26
v = -90.46 m/s
magnitude of the final velocity = 90.46 m/s
Therefore, the speed of the car after the break was applied is 90.46 m/s
A boat sailed 560 km in 8 hrs. It took three hours to travel the first 150 km. What was it’s average speed for the remaining journey?
Answer:
82 km/h
Explanation:
Given that A boat sailed 560 km in 8 hrs. It took three hours to travel the first 150 km. That is,
The remaining distance will be:
560 - 150 = 410 km
the remaining time will be:
8 - 3 = 5 hours
For the remaining Journey, average speed will be:
Speed = distance/time
Speed = 410/5
Speed = 82 km/h
Therefore, the average speed for the remaining journey will be 82 km/h
How many gallons fit in a 500.mL Nalgene bottle?
Note: 1 Liter (L)= 0.264 gal
Answer:
Glass & Plastic Bottle Measuring Systems Definitions. Milliliter (ml): Milliliters are used in the metric measurement system to measure units of liquid volume. One milliliter is equal to one cubic centimeter or 1/1000 of a liter…
Explanation:
Four states of matter and describe the particles arrangement of each
Answer:
There are four natural states of matter: Solids, liquids, gases and plasma.
Explanation:
The fifth state is the man-made Bose-Einstein condensates. In a solid, particles are packed tightly together so they don't move much.
If a skateboarder is moving at 4 meters per second then changes its velocity to 10
meters per second over the course of 10 seconds what is the skateboards acceleration?
Answer:
i was doing this is it actually 0.6
Explanation:
;D
The acceleration of the skateboard from its initial velocity to the final velocity over the given time is 0.6m/s².
What is Motion?Motion is simply the change in position of an object over time.
From the First Equation of Motion;
v = u + at
Where v is final velocity, u is initial velocity, a is acceleration and t is time elapsed.
Given the data in the question;
Initial velocity u = 4m/sFinal velocity v = 10m/sTime elapsed t = 10sAcceleration of the skateboard a = ?To determine the acceleration of the skateboard, we substitute our given values into the expression above.
v = u + at
10m/s = 4m/s + ( a × 10s)
( a × 10s) = 10m/s - 4m/s
a × 10s = 6m/s
a = 6m/s ÷ 10s
a = 0.6m/s²
Therefore, the acceleration of the skateboard from its initial velocity to the final velocity over the given time is 0.6m/s².
Learn more about Equations of Motion here: brainly.com/question/18486505
A plant is moved from direct sunlight and placed into complete darkness.
Which structure in the plant's cells would be most affected by this change?
Choose 1 answer:
(Choice A)
A
Mitochondria
(Choice B)
B
Chloroplast
(Choice C)
C
Vacuole
(Choice D)
D
Golgi body
a,
Explanation:
because when its moved thats the sugar of it
Answer:
b. Chloroplast
Explanation:
Arrange the following lengths in their increasing magnitude 1 meter, centimeter, 1 kilometer, 1 millimeter
Answer:
1 millimetre, 1 centimeter, 1 meter, 1 kilometer
Hope it helped u if yes mark me BRAINLIEST
A 1.35 kgkg block is attached to a spring with spring constant 15.0 N/mN/m . While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 34.0 cm/scm/s . What are
Given :
Mass of block , m = 1.35 kg .
Speed constant , k = 15 N/m .
Speed at centre , v = 34 cm/s = 0.34 m/s .
To Find :
The amplitude of oscillation .
Solution :
Now , we know total energy is conserved in SHM .
So , K.E at zero displacement :
[tex]K.E=\dfrac{mv^2}{2}\\\\K.E=\dfrac{1.35\times 0.34^2}{2}\\\\K.E=7.8\times 10^{-2}\ J[/tex]
Now , this K.E is equal to maximum P.E :
[tex]P.E=K.E=7.8\times 10^{-2}\ J[/tex] .
[tex]P.E=\dfrac{kA^2}{2}\\\\7.8\times 10^{-2}=\dfrac{kA^2}{2}\\\\A=\sqrt{\dfrac{2\times 7.8 \times 10^{-2}}{15}}\ m\\\\A=0.1019 \ m\\\\A=10.2\ cm[/tex]
Therefore , the amplitude is 10.2 cm .
Hence , this is the required solution .