A string is wrapped around a pulley with a radius of 2.0 cm and no appreciable friction in its axle. The pulley is initially not turning
A constant force of 50 N is applied to the string, which does not slip, causing the pulley to rotate and the string to unwind. If the string unwinds 1.2 m in 4.9 s, what is the moment of inertia of the pulley? A) 0.17 kg?m2
B) 17 kg?m2
C) 14 kg?m2
D) 0.20 kg?m2
E) 0.017 kg?m2
D
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A planetary nebula is
a. the expelled outer envelope of a medium mass star. b. produced by a supernova explosion. c. produced by a nova explosion. d. a nebula within which planets are forming. e. a cloud of hot gas surrounding a planet.
Electric Field of Point-Charges: Three equal positive point charges +q are placed at the corners of a square of side d as shown in the figure. Which one of the arrows shown represents the direction of the net electric field at the center of the square?
A. A B. B C. C D. D
The fundamental particles that are the building blocks of hadrons are __________
Fill in the blank(s) with correct word
Which of the numbers 0.1, 1.0, and 2.0 represent possible values for the COP of a heat pump?
1.0.1 only 2.1.0 only 3.2.0 only 4.all of these.