Answer:
The minimum thickness is 
Explanation:
generally the equation for thin film interference is mathematically represented as

Where t the thickness
m is any integer
n is the refractive index of the film
is the wavelength of light
Since we are looking for the thickness we make t the subject of the formula

m= 0 cause the thickness is minimum at m=0
Substituting values


Answer:

Explanation:
Puck A's initial speed is
and move in a direction
after the collision.
#
since there's no external force on the system(
#The collision equation can be written as;

The kinetic energies before and after the collision are expressed as:


Let +x along A's initial direction and +y along A's final direction makes the angle 

#Substitute in
:


Hence, the the speed of puck A after the collision is 12.891 m/s
#. The velocity of A after the collision is;

Substitute
into
:

This is the velocity of puck B after the collision, it's speed is:

The velocity of puck B after the collision is 6.8544 m/s
c. The direction of puck B after the collision is:

Hence, the direction of B's velocity after the collision is 62°
Answer:
The poem, Going Down the Hill on a Bicycle, written by Henry Charles Beeching describes the thrilling ride of a boy going downhill. ... The poet mentions how he lifts his feet from the pedals and keeps his hands still so that he would not lose his balance and fall off the bicycle, while it is dashing down the hill.
I think it’s current= A / C
Answer: v2 = -50.8m/s
Therefore, the speed of the baseball is 50.8m/s away from the bat. (Reverse direction)
Explanation:
Using the law of conservation of momentum:
The impulse of the bat = change in momentum of the baseball
Ft = ∆M
Ft = m1v1 - m2v2
Since m1 = m2 = m (the mass remains unchanged)
Ft = m(v1 - v2) .....1
Given:
Force F = 8900N
Mass m = 0.145kg
time t = 1.3 × 10^-3 s
Initial velocity v1 = 29m/s
Substituting into eqn 1
8900(1.3×10^-3) = 0.145(29-v2)
29-v2 = 79.79
v2 = 29 - 79.79 = -50.8m/s
v2 = -50.8m/s
Therefore, the speed of the baseball is 50.8m/s away from the bat.