Answer:
They all have frequency, wavelength, amplitude, speed and also all transfer energy.
 
        
             
        
        
        
Answer:
(A) V = 9.89m/s
(B) U = -2.50m/s
(C) ΔK.E = –377047J
(D) ΔK.E = –257750J
Explanation:
The full solution can be found in the attachment below. The east has been chosen as the direction for positivity.
This problem involves the principle of momentum conservation. This principle states that the total momentum before collision is equal to the total momentum after collision. This problem is an inelastic kind of collision for which the momentum is conserved but the kinetic energy is not. The kinetic energy after collision is always lesser than that before collision. The balance is converted into heat by friction, and also sound energy.
See attachment below for full solution.
 
        
             
        
        
        
When an object does not move even on pushing , static frictional force acts on in opposite direction of the applied force to stop the object from moving. static frictional force is a self adjusting force and it adjust its value according to the applied force if the applied force is smaller than the maximum value of static frictional force. The object starts moving once the applied force on it becomes greater than the maximum static frictional force.  hence the statement is true.
 
        
             
        
        
        
Answer:

Explanation:
 = Vacuum permittivity =
 = Vacuum permittivity = 
 = Area =
 = Area = 
 = Distance between plates = 1 mm
 = Distance between plates = 1 mm
 = Changed voltage = 60 V
 = Changed voltage = 60 V
 = Initial voltage = 100 V
 = Initial voltage = 100 V
 = Resistance =
 = Resistance = 
Capacitance is given by

We have the relation

The time taken for the potential difference to reach the required level is  .
.