Some charged particles in a bubble chamber are seen to move in spirals due to
A) decreasing magnetic field.
B) decreasing electric charge.
C) perspective and parallax.
D) energy dissipation.
Answer: D
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A worker lifts a heavy load using a two-pulley system as in the figure. If the tension in the rope segment labeled A is 725 N, what are the weight of the load, and the force that the worker exerts on the rope, respectively?
A. 363 N, 725 N
B. 725 N, 363 N
C. 1450 N, 725 N
D. 1450 N, 1450 N
E. Insufficient information is given to answer this question.
A 10-gram wire that is 6.0 m long is under tension. When a transverse wave of frequency 280 Hz travels along the wire, its wavelength is 0.60 m,and its amplitude is 8.4 mm
How much time does it take for a crest of the transverse wave to travel the length of the wire? A) 36 ms B) 31 ms C) 40 ms D) 44 ms E) 49 ms
Objects A and B, of mass M and 2M respectively, are each pushed a distance d straight up an inclined plane by a force F parallel to the plane. The coefficient of kinetic friction between each mass and the plane has the same value mk. At the highest point,
a. KA = Fd = KB. b. KA = (F - mkMg cosq)d; KB = (F - 2mkMg cosq)d. c. KA = (F - Mg sinq)d; KB = (F - 2Mg sinq)d. d. KA = (F - Mg sinq - mkMg cosq)d; KB = (F - Mg sinq - mkMg cosq)d. e. KA = (F - Mg sinq - mkMg cosq)d; KB = (F - 2Mg sinq - 2mkMg cosq)d.
If we divide the mass of a star by its volume we calculate the star's ____________________
Fill in the blank(s) with correct word