Express -40°C in °F
A) -72°F B) 4.4°F C) -40°F D) -54°F
C
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A 2.0-kg mass swings at the end of a light string (length = 3.0 m). Its speed at the lowest point on its circular path is 6.0 m/s. What is its kinetic energy at an instant when the string makes an angle of 50° with the vertical?
a. 21 J b. 15 J c. 28 J d. 36 J e. 23 J
Water at 4°C will contract when it is slightly
A) cooled. B) warmed. C) both of these D) none of the above
A 25.0-mH inductor, a 2.00-?F capacitor, and a certain resistor are connected in series across an ac voltage source at 1000 Hz. If the impedance of this circuit is 200 ?, what is the resistance of the resistor?
A) 100 ? B) 184 ? C) 200 ? D) 552 ? E) 579 ?
A grandfather clock that is regulated by a pendulum is orbiting the Earth aboard the space station. Compared to an identical clock on Earth, the grandfather clock aboard the space station will
A. run fast. B. not run at all. C. run slow. D. keep time at the same rate.