For angular momentum to be conserved, the net torque must be zero
Indicate whether the statement is true or false
TRUE
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How far above the horizon is the Moon when its image reflected in calm water is completely polarized? (nwater = 1.333)
a. 53.12° b. 18.44° c. 22.20° d. 36.88°
A photocathode having a work function of 2.4 eV is illuminated with monochromatic light whose photon energy is 3.4 eV. What is maximum kinetic energy of the photoelectrons produced?
(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 1.6 × 10-19 J B) 3.8 × 10-19 J C) 4.4 × 10-19 J D) 4.9 × 10-19 J E) 5.4 × 10-19 J
If 30 kJ of heat flows out of a system and 15 kJ of work is done by the system, then what is the change in internal energy?
A. 85 kJ B. 70 kJ C. 45 kJ D. 15 kJ E. 10 kJ
A 7.5 kg bowling ball is dropped from the top of a 25m tall building. Ignoring air resistance, when the bowling ball hits the sidewalk below, its kinetic energy is equivalent to how many food calories (one food calorie = 1 kilocalorie in SI measure)
A. 0.44 B. 880 C. 440 D. 0.22 E. 0.88 F. 220