While
You
Were
Out...

A stretched string, clamped at its ends, vibrates in its fundamental frequency. To double the fundamental frequency, one can change the string tension by a factor of

2
4
Square Root of 2
1/2
1/(Square Root of 2)

The intensity of a certain sound wave is 6 microwatts/cm2. If its intensity is raised by 10 decibels, the new intensity (in microwatts/cm2) is

60
6.6
6.06
600
12

A clear sheet of polaroid is placed on top of a similar sheet so that their polarizing axes make an angle of 30 degrees with each other. The ratio of the intensity of emerging light to incident unpolarized light is

1:4
1:3
1:2
3:4
3:8

The separation of white light into colors by a prism is associated with

Total internal reflection
Partial reflection from each surface
Variation of index of refraction with wavelength
A decrease in the speed of light in the glass
Selective absorption of various colors

As more slits with the same spacing are added to a multiple-slit system the lines

Spread further apart
Move closer together
Become wider
Become narrower
Do not change in position or width

A meter stick moves at 0.95c in the direction of its length through a laboratory. According to measurements taken in the laboratory, its length is

0 m
0.098 m
0.31 m
3.2 m
1.0 m

An object is moved from the center of curvature of a concave mirror toward its focal point. Its image will

Remain virtual and become larger
Remain virtual and become smaller
Remain real and become larger
Remain real and become smaller
Remain real and approach the same size as the object

A millionairess was told in 1973 that she had exactly 15 years to live. However, if she travels away from the earth at 0.8c and then returns at the same speed, the last New Year she can hope to celebrate is

1982
1984
1988
1998
2001

A cube of aluminum is 20cm on edge. Aluminum has a density 2.7 times that of water and a specific heat 0.217 times that of water. The heat in calories needed to raise the temperature of the cube from 20degree C to 30degree C is about

27
37
47
27000
47000

A thermometer indicates 98.6degree C. It may be

Outdoors on a cold day
In a comfortable room
In a cup of hot tea
In a normal person mouth
In liquid air