A 2.00 kg mass is located at (4.00 m, 0.00 m, 0.00 m) and a 4.00 kg mass is located at (0.00 m, 3.00 m, 0.00 m). The center of gravity of the system of masses is
A. (1.33 m, 2.00 m, 0).
B. (1.33 m, 1.00 m, 0).
C. (1.50 m, 1.33 m, 0).
D. (2.00 m, 1.33 m, 0).
E. (1.33 m, 1.50 m, 0).
A. (1.33 m, 2.00 m, 0).
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Heat Engines: A certain heat engine extracts 1.30 kJ of heat from a hot temperature reservoir and discharges 0.70 kJ of heat to a cold temperature reservoir. What is the efficiency of this engine?
A. 46% B. 54% C. 86% D. 27% E. 13%
A projectile is launched from the surface of a planet (mass = m, radius = r). What minimum launch speed is required if the projectile is to rise to a height of 2r above the surface of the planet? Disregard any dissipative effects of the atmosphere.
A.
B.
C.
D.
E.
The theory that Earth's lithospheric plates are in constant, slow motion is called plate ______________
Fill in the blank(s) with correct word
The circuit below contains three resistors, A, B, and C, which all have equal resistances. The emf ? = 110V. Which resistor generates the most thermal energy after the switch is closed?
a.
A
b.
B
c.
C
d.
A and B
e.
All three generate equal amounts of thermal energy.