Answer:
(a) 
(b)
Explanation:
Given that , the power of the laser beam is,

and time is given is,

Now the energy formula for the laser beam is,

Now,
(a) The value of energy is given,

Now the no of photons's fraction fluctuation is,

Therefore the no of photons is
.
(b)The value of energy is given,

Now the no of photons's fraction fluctuation is,

Therefore the no of photons is
.
Answer with Explanation:
We are given that
Charge on alpha particle=q=2 e=
1 e=
Mass of alpha particle=m=
Potential difference,V=
Magnetic field,B=3.49 T
a.Speed of alpha particle=v=
By using the formula


b.Magnetic force,F
F=
c.Radius of circular path, r=

r=0.084 m
Answer:
90m/h N
Explanation:
we consider janes velocity to the positive X axis so Vj=280km/s
and the final position a dot in on the graph r=294km, we find the x and y components:
294*cos(17.8)=280 X+ confirming our theory
294*sin(17.8)=90 Y+ or N and that's the winds' velocity.