Answer:
B
Explanation:
Heat increase molecular motion
 
        
                    
             
        
        
        
Answer a would be correct since velocity is a vector and has a magnitude and a direction. In this case v₁ = - v₂.
        
                    
             
        
        
        
Answer: the airy pattern can only arise from wave propagation
Explanation:if particles went in straight lines through a slit, they would progate linearly and not interfere. The airy pattern arises from diffraction as waves interfere, producing peaks (constructive interference where peaks of waves from each slit coincide) and troughs (destructive interference where peaks and troughs of waves from each slit cancel out). If intensity rather than field is measured nodes occur where 0 values line up instead of troughs
 
        
             
        
        
        
Answer:

Explanation:
Given data

To find
Mutual inductance of the two-coil system
Solution
The mutual inductance given as:
M= (-VΔt)/ΔI
Substitute the given values
So

 
        
             
        
        
        
Answer:twice of initial value
Explanation:
Given
spring compresses  distance for some initial speed
 distance for some initial speed
Suppose v is the initial speed and k be the spring constant 
Applying conservation of energy
kinetic energy converted into spring Elastic potential energy

When speed doubles

divide 1 and 2


Therefore spring compresses twice the initial value