A(n) ______________is denser than a neutron star
Fill in the blank(s) with correct word
black hole
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How many Saros cycles does it take for the same eclipse to occur at about the same location on Earth?
a. one cycle b. three cycles c. 18 cycles d. 22 cycles e. 54 cycles
An irreversible engine operating between the temperatures of 550 K and 300 K extracts 1200 J of heat from the hot reservoir and produces 450 J of work. How much entropy is created in the process?
A) 0.32 J/K B) 0.68 J/K C) 0.44 J/K D) 0.73 J/K E) 0 J/K
The figure shows a cross section of three parallel wires each carrying a current of 24 A. The currents in wires B and C are out of the paper, while that in wire A is into the paper. If the distance R = 5.0 mm, what is the magnitude of the force on a 4.0-m length of wire A?
a.
15 mN
b.
77 mN
c.
59 mN
d.
12 mN
e.
32 mN
A 3.50 kg block is pulled along a moving conveyor belt at a constant speed of 0.500 m/s relative to a stationary observer while the belt moves at a constant speed of 0.200 m/s in the opposite direction. If the coefficient of kinetic friction is 0.400, the magnitude of the mechanical energy dissipated, in J, caused by the force of friction on the block in 8.00 s is
a. 5.6. b. 22.0. c. 32.9. d. 54.8. e. 76.8.