Equal charges are located at the vertices of a 3-4-5 triangle. The charge experiencing the largest force is located at
A)
the 90° vertex.
B)
the 37° vertex.
C)
a vertex that depends on the size of the charges.
D)
the 53° vertex.
E)
cannot be determined.
D
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versus t for an object moving along straight line. What is the acceleration at t = 11 s?
A. -10 
B. 10
C. 22
D. -22
The white dwarf that remains when our Sun dies will be mostly made of
A) hydrogen. B) helium. C) carbon. D) neutrons.
Because of absorption, a Polaroid will actually transmit about 40% of incident nonpolarized light. Two Polaroids with their axes aligned will transmit
A) 0%. B) 40%. C) 100%. D) between 0% and 40%. E) between 40% and 100%.
When we speak of time dilation, we mean that time
A) compresses with speed. B) stretches with speed. C) is constant at all speeds.