I believe the answer is A) Less work in less time.
Answer:
18kcal
Explanation:
Melting enthalpy of water: 80 cal/g
The melting enthalpy discribes how much heat is needed to melt a substance. So you get the heat by multiplying the mass of your substance with its melting enthalpy.
225g*18cal/g=18000cal=18kcal
Answer:
(C) 3.78 seconds
Explanation:
At the highest point, the velocity is equal to 0m/s
; t is the time to reach the highest point
The time the ball takes to return to its starting point after the ball reach its maximum height is the same:
Answer:
Explanation:
Given
initial angular velocity is
when motor is turned of it started decelerating with angular acceleration
angle turned before coming to halt
here final angular velocity is zero
No of revolutions will be