Question

A tire swing of length L = 6.3 m hangs from a tree over the water.   On a hot day, a swimmer uses the swing to jump into the lake, and afterward the swing oscillates as a simple pendulum. What is the period of this pendulum?

Question options:

	5.0 s
	6.0 s
	none of these
	3.1 s
	4.3 s

Question

An electric field of magnitude 100. N/c points vertically downward near Earth's surface. What force does a free electron experience in this space? Take the charge on the electron to be 1.60x10^-19 C.

Question options:

	1.60x10^-17 N upward
	none of these
	1.6x10^-19 N downward
	1.60x10^-17 N downward
	1.60x10^-19 N upward

Question

For the water in the pictures (it's a little bit muddy) the index of refraction is 1.366. What is the angle of refraction for the light ray shown?

Question options:

	37 degrees
	23 degrees
	19 degrees
	43 degrees
	48 degrees

Question

In thin film problems, the condition for bright reflection when 1 wave (only) is phase shifted becomes

Question options:

	2t=mλ0/n2t=mλ0/n
	2t=(m+1/2)λ0/n2t=(m+1/2)λ0/n
	2t=(m+1/2)λ02t=(m+1/2)λ0
	2t=mλ02t=mλ0
	none of these

Answer 1

length (1) = 6.3m T=25 a = (2) (3.14) 6.3 9.8 -> T: 5.0 SEL ② F EU = (100) (1.6x1019) - -19 1.68 ION down world (3 how = 1.366 0; = 30° nair= 1 09-? no sindi - nais mon (1.366) sin 30 = 1. sinon on = 43 Degrees © 2n+(2n+1) → 27 = (m++) do