Estimate the number of pennies that would fit in a box one foot across by one foot wide by one foot tall
A)
5 × 102
B)
5 × 103
C)
5 × 104
D)
5 × 105
E)
5 x 104
C
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A charged particle (mass = M, charge = Q> 0) moves in a region of space where the magnetic field has a constant magnitude of B and a downward direction. What is the magnetic force on the particle at an instant when it is moving horizontally toward the north with speed V?
A. QVB toward the east B. Zero C. QVB toward the west D. QVB upward E. QVB toward the south
On a scale where the distance from Earth to the Sun is about 15 meters, the distance from Earth to the Moon is
A) small enough to fit within your hand. B) about 1 meter. C) about 5 meters. D) about 30 meters.
Explain why white clothing keeps us cool, whereas black clothing warms us. Which is the better reflector? Which is the better absorber?
What will be an ideal response?
A container has a large cylindrical lower part with a long thin cylindrical neck. The lower part of the container holds 12.5 
of water and the surface area of the bottom of the container is 5.00 
The height of the lower part of the container is 2.50 m and the neck contains a column of water 8.50 m high. The total volume of the column of water in the neck is 0.200 
What is the magnitude of the force exerted by the water on the bottom of the container?
A. 
B. 
C. 
D. 