Answer: a change from one state of matter to another
Explanation: Phase change is an example of a physical change. The chemical composition does not alter during phase change. For example when ice melts its composition is still H2O but in liquid form.
Answer:
The apparent weight of the person as she pass the highest point is 
Explanation:
From the question we are told that
The radius of the Ferris wheel is 
The period of revolution is 
The weight of the person is 
Generally the speed of the wheel is mathematically represented as

substituting values


The apparent weight (the normal force exerted on her by the bench) at the highest point is mathematically evaluated as

Where m is the mass of the person which is mathematically evaluated as

substituting values


So


Answer:
When an object vibrates, it causes the molecules in the air around it to move. These molecules collide with nearby molecules, forcing them to vibrate as well. As a result, they collide with more surrounding air molecules.
Explanation:
To the right, if you push something left the friction is to the right
Answer:
Explanation:
Given
Total time=27 min 43.6 s=1663.6 s
total distance=10 km
Initial distance 
time taken=25 min =1500 s
initial speed 
after 8.13 km mark steve started to accelerate
speed after 60 s


distance traveled in 60 sec


time taken in last part of journey

distance traveled in this time


and total distance


