A 15-kg block rests on a level, frictionless surface and is attached by a light string to a 10-kg hanging mass where the string passes over a massless frictionless pulley. If g = 9.8 m/s2, what is the tension in the connecting string?
a. 65 N
c. 59 N
b. 17 N
d. 37 N
C
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2.00 moles of an ideal gas is at a pressure of 1.50 atmospheres and a volume of 0.00100 m3. What is the total kinetic energy of the gas?
A. 175 J B. 228 J C. 267 J D. 303 J E. 367 J
Why was it advantageous for the Voyager mission to consist of flybys rather than orbiters?
A) Spacecraft making flybys can return to Earth more quickly than orbiters. B) Each individual spacecraft was able to visit more than one planet. C) It was easier for data to be radioed back to Earth with flybys than orbiters. D) Flyby spacecraft can get closer to a planet than an orbiting spacecraft.
The process by which electricity can be generated by using running or falling water is known as
a. groundwater generation. b. hydroelectric generation. c. geothermal generation. d. steam generation.
The fact that a particle cannot be precisely localized is the
a. photoelectric effect. b. uncertainty principle. c. principle of a hologram. d. principle of a laser. e. reason why photons are emitted.