Answer: false
Explanation: friction makes objects slow down and stop
Answer:
Explanation:
We are given that
Speed of light,v=
Diameter of ring,d=92 m
Radius,r=
Current, I=0.40 A
We have to find the number of electrons in the beam.
We know that
Current,I=
Where q= ne
Using the formula
Answer:
Change in mechanical energy,
Explanation:
It is given that,
Mass of the projectile, m = 12 kg
Speed of the projectile, v = 20 m/s
Maximum height, h = 18 m
Initially, the projectile have only kinetic energy. it is given by :
K = 2400 J
Finally, it have only potential energy. it is given by :
P = mgh
P =2116.8 J
The change in mechanical energy is given by :
So, the change in mechanical energy is 283.2 J. Hence, this is the required solution.
20,000,000 kg*m/s
p=mv
10,000,000=m(v/2)
20,000,000=mv