Evaporation occurs when atoms/molecules leave the surface of the liquid.
Boiling occurs when this evaporation take a place in a body of the liquid.
Answer:
Truck 
Road 
Explanation:
= Acceleration of truck = 
= Coefficient of friction = 
Frictional force is given by
Net acceleration is given by
The acceleration of the box relative to the truck is and relative to the road.
Answer:
Explanation:
Given
charge on alpha particle=+2e
mass of alpha particle=
kg
Charge on gold nucleus=+79e
Velocity at r=1m is 
Using Energy conservation
Kinetic energy of particle will be converting to Potential energy as it approaches to nucleus
therefore
![\frac{1}{2}\left ( 6.64\times 10^{-27}\right )\left ( 1.9\times 10^{7}^2\right )=\frac{9\times 10^9\times 158\times \left ( 1.6\times 10^{-19}\right )}{y}\left [\frac{1}{r_0}-\frac{1}{1}\right ]](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%5Cleft%20%28%206.64%5Ctimes%2010%5E%7B-27%7D%5Cright%20%29%5Cleft%20%28%201.9%5Ctimes%2010%5E%7B7%7D%5E2%5Cright%20%29%3D%5Cfrac%7B9%5Ctimes%2010%5E9%5Ctimes%20158%5Ctimes%20%5Cleft%20%28%201.6%5Ctimes%2010%5E%7B-19%7D%5Cright%20%29%7D%7By%7D%5Cleft%20%5B%5Cfrac%7B1%7D%7Br_0%7D-%5Cfrac%7B1%7D%7B1%7D%5Cright%20%5D)
on solving we get
Answer:
200 revolutions per minute = 20.9 rad/s
Explanation:
It is given that, a figure skater is rotating at a rate of 200 revolutions per minute. It is the angular velocity of the skater. We have to convert it into radian/second.
Revolution per minute can be converted to radian per minute as :
Since, 1 radian/second = 60/2π revolutions per minute
So, 1 revolution/minute = 2π/60 radian/second
200 revolution/minute = 200 × 2π/60 radian/second
200 revolution/minute = 20.9 radian/second
Hence, this is the required solution.
