Car A (mass = 1000 kg) moves to the right along a level, straight road at a speed of 6.0 m/s. It collides directly with car B (mass = 200 kg) in a completely inelastic collision
What is the momentum after the collision if car B was initially at rest?
A) 2.0 KN-s to the right
B) 6.0 KN-s to the right
C) 8.0 KN-s to the left
D) 10. KN-s to the right
E) zero
B
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A transverse periodic wave is represented by the equation y(z, t) = 2.0 cm sin(1,200 rad/s t - 20.0
z). Another transverse wave is represented by the equation y(z, t) = 2.0cm sin(1,200 rad/s t + 20.0
z). What is the equation that represents the superposition of the two waves?
A. y(z, t) = 4.0 cm sin(1,200 rad/s t - 20.0 
z)
B. y(x, t) = 4.0 cm sin(1,200 rad/s t) cos(20.0x)
C. y(x, t) = +4.0 cm cos(1,200 rad/s) sin(20.0
x)
D. y(x, t) = +4.0 cm cos(1,200 rad/s) + (20.0x)