If there is a 25 [lbs] of force acting on a 5 [lbs] of mass, what is the acceleration of that mass?

Consider a metal rod of uniform temperature. Is it possible that heat spontaneously flow from one end of the rod to the other en

raketka [301]

Answer:

No its not possible in that yes heat flow is due to temperature different but with time equilibrium in temperature is reached hence there is no temperature difference at both ends at this time

4 0

3 years ago

Alyse runs to her classroom which is 20 meters away. She forgets her physics book in her locker and must return 20 meters in the

notka56 [123]

The average velocity of Alyse is 0 m/s.

<h3>What is the average velocity of an object or a person?</h3>

The average velocity of a person is the average of all the velocities of moving as it moves.

Velocity on its own is the ratio of the displacement of a body and the time taken for that displacement.

Mathematically:

Average velocity = total displacement / time taken

Displacement is a vector quantity that measures the distance traveled by a moving body in a specific direction.

Hence, average velocity and velocity are both vector quantities.

Displacement takes a measure of the shortest possible distance along a straight line from the beginning of the motion until the end of the motion.

Calculating the average velocity of Alyse:

Assuming the initial direction is positive and n=backeard direction is negative:

Total displacement = 20 m + - (20 m)

Total displacement = 0 m

total time = 3 minutes

Average velocity = 0 m/ 3

Average velocity = 0 m/s

Learn more about average velocity at: brainly.com/question/4931057

#SPJ1

3 0

1 year ago

How does collision time affect impact forces

Licemer1 [7]

Answer:

A large increase in collision time can mean decrease in impact force. This is essentially what an air bag in your car does. It increases the time over which it stops you and decreases the force. ... In this case, the piano would have a smaller change in momentum and a smaller impact force.

Explanation:

5 0

3 years ago

By what factor would your weight change if the earth's diameter were doubled and its mass were also doubled?

coldgirl [10]

Aha! This is a fun question, likely AP Physics 1 if I'm not mistaken. This is how you solve it, you need the following equation.

$F=G\frac{m_{1} *m_{2}}{r^2}$

Now on this question you don't need to actually use the mass and diameter of the earth as we are only looking at the factor of how much your weight would change, so you can just plug in some random numbers for the mass and radius. In my case I will use the original radius as being 2 meters and the original mass of the earth as being 20kg. You can actually just omit the mass of your body and the gravitational constant isn't necessary to be multiplied by because they will remain the same in both scenarios.

Original weight:

$F= \frac{20kg}{2^2m}$
$F=5N$

So the original weight in this circumstance is 5N. Now then if we double the mass to 40kg and the radius to 4m you will have the following.

$F= \frac{40kg}{(4)^2m}$
$F=2.5N$

So the original weight was 5N and after doubling the mass and radius the weight reduced to 2.5N. This means the factor which your weight would change by is .5 or decrease by 1/2.

I hope this helps you :) You can ask me if you have any additional physics questions.

7 0

3 years ago

A __________ change occurs when the bonds between atoms or molecules change and a new substance forms. nuclear permanent physica

algol13

<span>A chemical change occurs when the bonds between atoms and molecules change, and a new substance forms. This chemical change may or may not be permanent and may or may not physically affect an object. However, it always affects the chemical composition.</span>

8 0

3 years ago