<span>P= work/time and work is = to force x distance so its 500x4 =2000joules
and 2000/4 =500 watts</span>
Answer:
The distance of the second dark band away from the central bright spot be located is 
Explanation:
Given that,
Wave length = 500 nm
Radius 
Distance from the hair sample D= 6 m
We need to calculate the distance of the second dark band away from the central bright spot be located


Using formula for dark fringe

Put the value into the formula




Hence, The distance of the second dark band away from the central bright spot be located is 
Thermal equilibrium is achieved when two objects or systems reach the same temperature and cease to exchange energy through heat. When two objects are placed together, the object with more heat energy will lose that energy to the object with less heat energy.
Speed equals distance times time