Answer:
As the car travels up the coaster it is gaining potential energy.
Explanation:
Because It has the greatest in amount of potential energy at the top of the coaster. when the car travels down the roller coaster it obtains speed and kinetic energy.
 
        
                    
             
        
        
        
Answer:
310 meters
Explanation:
Given:
v₀ = 0 m/s
t = 8.0 s
a = -9.8 m/s²
Find: Δy
Δy = v₀ t + ½ at²
Δy = (0 m/s) (8.0 s) + ½ (-9.8 m/s²) (8.0 s)²
Δy = -313.6
Rounded to two significant figures, the object fell 310 meters.
 
        
             
        
        
        
The velocity is 4374.45 m/s. 
I got the answer by using v=d/t.
20,000meters / 25min= 4,374.45 m/s.
        
             
        
        
        
Answer:

Explanation:
We are given that  
The wavelength of sound wave=
1 cm/s=
Speed of sound wave,v=
We have to find the period of the wave.
We know that 
Frequency=
Using the formula 
Frequency = Hz
 Hz
Time period=
Using identity:
Hence, the time period of the wave=
 
        
             
        
        
        
Answer:
Amount of  Energy transferred 
Explanation:
Given:
Initial volume=V
Initial pressure=P
Final volume=2V
Final pressure=3P
Now w know that the Energy transferred in constant pressure pressure is given by

Now the Energy transferred in constant volume process is given by

The total Energy transferred is given by
