Two cars start at the same point, but travel in opposite directions on a circular path of radius R, each at speed v. While each car travels a distance less than 
, one quarter circle, the center of mass of the two cars
A. remains at the initial point.
B. travels along a diameter of the circle at speed v' v.
E. remains at the center of the circle.
Answer: B
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_____ are reactions that join the nuclei of atoms to form more massive nuclei
A) Endothermic reactions B) Nuclear fission reactions C) Nuclear fusion reactions D) Chemical reactions
Work Done by a Gas: The figure shows a pV diagram for an ideal gas that is carried around a cyclic process. How much work is done in one cycle if p0 = 4.00 atm and V0 = 3.00 L? (1.00 atm = 101 kPa)
A. 1210 J B. 485 J C. 2280 J D. 2420 J E. 4850 J
Mercury orbits the sun about once every 80 days. Mercury is observed to keep the same side facing the sun at all times. If Mercury had oceans, how much time would elapse between its high tides
A. there would be no tides B. 40 days C. 80 days D. 160 days
A coaxial cable has an inner cylindrical conductor surrounded by cylindrical insulation and an outer cylindrical conducting shell. The outer shell carries the same current but in the opposite direction from that in the inner conductor as shown. If the coaxial cable sits in a uniform magnetic field directed upwards with respect to the cable, the effect of the field on the cable is
a.
a net force to the left.
b.
a net force to the right.
c.
a net force upwards.
d.
no net force but a slight shift of the inner conductor to the left and the outer conductor to the right.
e.
no net force but a slight shift of the inner conductor to the right and the outer conductor to the left.