Which of the following is not considered to be one of the four fundamental forces?
A)
the gravity force
B)
the meson force
C)
the weak nuclear force
D)
the strong nuclear force
E)
the electromagnetic force
B
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Multiple-Object Accelerating Systems: A 5.0-kg block and a 4.0-kg block are connected by a 0.6 kg rod, as shown in the figure. The links between the blocks and the rod are denoted by A and B. A vertical upward force of magnitude F is applied to the upper block. The blocks and rod assembly are moving downward at constant velocity of 85 cm/s.(a) What is the magnitude of the applied force F?(b) What magnitude force does link A exert?
Fill in the blank(s) with the appropriate word(s).
The first pulsars were observed using ________ telescopes.
A. gamma ray B. X-ray C. infrared D. radio E. optical
Which ray diagrams are correct? The three rays in each diagram are distinguished by different types of lines. Hint: Check the behavior of each ray as it interacts with the lens.
A. B and C B. C and D C. D and E D. C and E E. C, D and E
An object is moving with constant non-zero velocity on the +x axis. The velocity versus time graph of this object is
A) a horizontal straight line. B) a vertical straight line. C) a straight line making an angle with the time axis. D) a parabolic curve. E) a hyperbolic curve.