Graphical Addition: Consider two vectors 
and 
shown in the figure. The difference 
-
is best illustrated by
A. choice (a)
B. choice (b)
C. choice (c)
D. choice (d)
Answer: C
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The flow rate of a liquid through a 2.0-cm radius pipe is 0.016 m3/s. The average fluid speed in the pipe is:
a. 0.64 m/s. c. 0.040 m/s. b. 13 m/s. d. 6.4 m/s.
In which case does an electric field do positive work on a charged particle?
a. A negative charge moves opposite to the direction of the electric field. b. A positive charge completes one circular path around a stationary positive charge. c. A positive charge is moved to a point of higher potential energy. d. A positive charge completes one elliptical path around a stationary positive charge.
What does the phenomenon of diffraction demonstrate?
A) the wave nature of light B) the polarization of light waves C) the quantization of atomic orbitals D) the particle nature of the photon E) the process of ionization
A 4.20-g bullet embeds itself in a 20.0-kg block, which is attached to a horizontal spring with a force constant of 950 N/m. The maximum compression of the spring is 2.10 cm. What is the speed of the bullet just before it hits the block?
A) 690 m/s B) 700 m/s C) 672 m/s D) 900 m/s E) 952 m/s