Abilliard ball moving at 5.00 m/s strikes a stationary ball of the same mass. after the collision, the first ball moves at 4.33 m/s at an angle of 30 degrees with respect to the original line of motion. a. find the velocity (magnitude and direction) of the second ball after the collision. b. was the collision inelastic or elastic? (make a claim and support with evidence.)

Answer

given,

initial speed of the billiard ball,u = 5 m/s

initial speed of second ball, u' = 0 m/s

after collision

final speed of first billiard, v = 4.33

at 30° from the original line

second velocity of the second billiard = ?

b)Collision between the two block is elastic.

mass of both the balls are not same

so,

θ₁ + θ₂ = 90°

 θ₁ = 30°

θ₂ = 90° - 30°

θ₂ = 60°

a) using conservation of momentum

  m u + m u' = m v cos θ₁ + m v' cos θ₂

  m x 5  + 0 = m x 4.33 x cos 30° + m x v' x cos 60°

  0.5 v' = 1.25

    v' = 2.5 m/s

i think if it were me i whould divide 300 dide 15

step-by-step explanation:

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle  

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.