
A converging lens has a focal length of 10 cm.
If an object is placed 50 cm from the lens, what will be the magnitude of the
magnification of the image? 1/5
1/4
1/2
2
5 

Viewed from one frame of reference, a 1500 kg
automobile with a velocity of 25 m/s collides with a 1000 kg automobile at rest. The two
automobiles stick together. What would be the velocity of the two cars immediately after
the collision in a frame of reference moving at 10 rn/s in the same direction as the 1500
kg automobile? 25 m/s
15 m/s
5 m/s
0 m/s
5 m/s 

The most common isotope of Uranium, ^{238}_{92}U,
radioactively decays into ^{206}_{82}Pb, Lead, by means of a series of
alpha and beta particle emissions. How many of each particle must be emitted? 32 alphas and 10 betas
16 alphas and 16
betas
16 alphas and 8
betas
8 alphas and 6
betas
4 alphas and 16
betas 

A small bird with a mass of 0.5
kg takes off from the ground and flies with an upward velocity of 3 m/sec for 10 seconds.
Which of the following is closest to the minimum power that must be developed by the bird? 60 watts
15 watts
9 watts
6 watts
1.5
watts 

Two iron spheres separated by some distance have
a minute gravitational attraction, F. If the spheres are moved to one half their original
separation and allowed to rust so that the mass of each sphere increases 41%, what would
be the resulting gravitational force? 2F
4F
6F
8F
10F 

After the switch in the accompanying circuit has
been clossel for a very lorg time, what would be the total current in the circuit shown
below? 0.53
amperes
0.90
amperes
1.5
amperes
1.9
amperes
2.0
amperes 

Which of the following graphs would best
represent the resistance versus temperature relationship for a superconductor? 

A moving charged particle experiences no
magnetic force Which of the following statements MUST be true? The
particle must be moving parallel to a magnetic field.
The particle
must be moving perpendicular to a magnetic field.
The particle
must NOT be moving in a magnetic field.
The particle
must be moving in an electnc field.
None of the
above must be true. 

The NEXT two questions refer to the following
situation. Three electric charges (Q_{1}, Q_{2} & Q_{3}) are
arranged at three comers of a rectangle as shown in the diagram and each has a charge of
40 nC. What is the magnitude of the net force on Q_{2}?
1.4 x
10^{ 5} N
1.7
x 10^{ 5} N
4.2
x 10^{ 5} N
4.6
x 10^{ 5} N
14.7
x 10^{ 5} N 

What would be the magnitude of the total
electric field at center point X? 1440 N/C
720 N/C
360 N/C
180 N/C
90 N/C 