The index of refraction is a dimensionless number greater than unity because is always less than . Furthermore, is equal to unity for vacuum.

Q: The amplitude of the wave shown is ---.

A: Answer is (d)  2 m, explanation is in next step

Q: A 5.50 cm tall object is 24.0 cm from a concave mirror with f = 20.0 cm. Find the image distance.

A: object distance from concave mirror, u = 24 cm focal length , f = 20 cm height of object, h = 5.5 cm

Q: a) negative; negative b) negative; positive c) positive; positive

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Q: Page 102 Practice Problem 4.2: Suppose the counter attendant pushes a 0.35kg bottle with the same…

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A: Given data:  A solid object  Relative density (RD) = 2.21 Mass (m) = 4130 g Required: The volume (V)…

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Q: A signed value is one that can be positive, negative, or zero.   True   False

A: Signed value is 32 bit datum that encodes an integer which may be positive, negative or zero.

Q: FIRST QUESTION IS INCORRECT

A: a) Since the turntable is initially at rest, the initial angular momentum of the system will be…