A 68 kg driver gets into an empty taptap to start the day's work
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A 68 kg driver gets into an empty taptap to start the day's work

1. A 68 kg driver gets into an empty taptap to start the day's work. The springs compress 2.2×10−2 m. What is the effective spring constant of the spring system in the taptap?

Enter the spring constant numerically in newtons per meter using two significant figures.

2. Which phenomenon provides the BEST evidence that light has a wave nature?

a.     reflection of light from a mirror

b.     diffraction of light passing through a narrow opening

c.      absorption of light by a black sheet of paper

d.     emission of light from an energy-level transition in a hydrogen atom 

Hint
EconomicsReflection Of Light From a Mirror: According to wave-based theories, the light waves spread out from the source in all directions, and upon striking a mirror, are reflected at an angle determined by the angle at which the light arrives. The reflection process inverts each wave back-to-front, which is why a reverse image is observed....

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