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3 years ago

Help. Science is getting on my nerves

Physics

2 answers:

anyanavicka [17]3 years ago

8 0

The correct answer is the First choice

NISA [10]3 years ago

7 0

Both objects must have mass

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At a given instant in time, two cars are traveling at different velocities, one twice as large as the other. Based on this infor

Sati [7]

Answer: No, is not possible.

Explanation:

We have two cars traveling at different velocities, one with velocity v and other with velocity 2*v

We want to know of it is possible to say which of these two cars has the larger acceleration at this instant of time.

Acceleration is the rate of change of the velocity, for example, if acceleration = 0, the velocity does not change.

Notice that knowing only the velocity at a given instant of time, we do not have any way of knowing the acceleration of each car.

Such that acceleration is given by the second Newton's equation:

F = m*a

force equals mass times acceleration.

We do not know any of these quantities for the cars, so we can not say anything about the accelerations.

We also could know the average acceleration if we know the change in velocity over an interval of time, such that:

Av acceleration = (change in velocity)/(interval of time)

But here we do not have a change in velocity, so again, we can't say anything about the acceleration.

3 0

3 years ago

Velocity differs from speed in that velocity indicates a particle's __________ of motion.

masha68 [24]

Velocity differs from speed in that velocity indicates a particle's direction of motion.

Therefore, your correct answer is: Direction

Good luck with your studies, I hope this helps~!

5 0

3 years ago

If at 10m above the ground an object has 50J of Kinetic Energy, with 50J of Potential Energy. How high can the object travel?

steposvetlana [31]

Hi there!

$\large\boxed{\text{B) 20 meters}}$

We know that:

$E_T = U + K$

U = Potential Energy (J)

K = Kinetic Energy (J)

E = Total Energy (J)

At 10m, the total amount of energy is equivalent to:

U + K = 50 + 50 = 100 J

To find the highest point the object can travel, K = 0 J and U is at a maximum of 100 J, so:

100J = mgh

We know at 10m U = 50J, so we can solve for mass. Let g = 10 m/s².

50J = 10(10)m

m = 1/2 kg

Now, solve for height given that E = 100 J:

100J = 1/2(10)h

100J = 5h

h = 20 meters

3 0

3 years ago

What forms when air masses with different temperatures meet?

WARRIOR [948]

Clouds and fog and it may rain or snow

7 0

3 years ago

Read 2 more answers

Two rocks, A and B, are thrown horizontally from the top of a cliff. Rock A has an initial speed of 10 meters per second and roc

maria [59]

Answer:

i need help

Explanation:

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2 years ago