What is the percent uncertainty in the measurement 2.58 ± 0.15 cm?
A)
2.9%
B)
5.8%
C)
8.7%
D)
12%
E)
15%
B
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The unit of resistance is called a(n)
a. volt. b. ampere. c. coulomb. d. ohm. e. watt.
Thermodynamic Processes: The figure shows a pV diagram for 8.3 g of ideal nitrogen gas N2 in a sealed container. The temperature of state 1 is 59°C, the atomic mass of the nitrogen atom is 14 g/mol, and R = 8.31 J/mol ? K. What are (a) pressure p1 and (b) temperature T2?
A. (a) 81 atm, (b) 660°C B. (a) 14 atm, (b) 660°C C. (a) 81 atm, (b) 120°C D. (a) 14 atm, (b) 120°C
A motor drives a shaft at f 5 10 Hz and delivers P 5 35 kW of power. The allowable shear stress in the shaft is 45 MPa. The minimum diameter of the shaft is approximately:
(A) 35 mm
(B) 40 mm
(C) 47 mm
(D) 61 mm
Spacecraft have landed on all the terrestrial worlds except
A) Mercury. B) Venus. C) Moon. D) Mars. E) Spacecraft have landed on all of the terrestrial worlds.