Answer:
A) the liquid particals move slower
Explanation:
vapor has a higher temp and have more energy than liquid so it's not c or d. and liquid has a lower boiling point than vapor
The forces that were exerted during the air resistance was the gravity.
<u>Explanation:</u>
Air resistance is the frictional power air applies against a moving article. As an article moves, air opposition backs it off. The quicker the article's movement, the more prominent the air obstruction applied against it.
The force acting upon the objects dropped in the air was air resistance and gravity. The force acting upon the objects dropped in the vacuum was gravity only.
First you need to calculate the velocity of the stone when it reaches the ground level. This is easy to find from energy conservation, since the potential energy it had at the top of the tower has been totally converted into kinetic energy.
We don't know the mass of the stone, but it cancels from both equations. This gives
so v=44.27 m/s.
Now, the time it took the stone to fall from the top of the tower to the ground is calculated easily from
.
The initial velocity is 0, the initial height is 100 meters and the final height is 0 since we are taking the ground floor as height 0.
This gives
So the time it took the stone to fall from the ground level to the bottom of the well is 5-4.52=0.48 s.
We can now use
where v is the velocity we calculated before v=44.27 m/s, time is t=0.48 s and xf is the depth of the well.
So the solution is 22.5 m
Answer:
Friction is a force that slows down moving objects. If you roll a ball across a shaggy rug, you can see that there are lumps and bumps in the rug that make the ball slow down. The rubbing, or friction, between the ball and the rug is what makes the ball stop rolling.