Answer:
Minimum speed will be equal to 2.213 m/sec
Explanation:
We have given radius of the r = 2 m
Coefficient of friction 
At minimum speed frictional force will be equal to centripetal force
So 


So the minimum speed will be equal to 2.213 m/sec
B. North Pole because it’s pointing at the north pole, and not the others
Answer:
its velocity is 51, or 51.42 to be exact it would be: 51.4285714286
Blue light has a shorter wavelength than does red light, and since it travels at the same speed (in vacuum) as red light, has a higher frequency. This gives it a higher energy per photon.