I use a rope 1.00-m-long to swing a 1.00-kg weight around my head. The tension in the rope is 20.0 N. In half a revolution how much work is done by the rope on the weight?

a. 20.0 J
b. 31.4 J
c. 123 J
d. 0


D

Physics & Space Science

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An electron moving perpendicular to a magnetic field of 3.2 × 10-2 T moves in a circle of radius 0.40 cm. How fast is this electron moving?

A) 2.3 × 107 m/s B) 1.9 × 10-53 m/s C) 1.9 × 10-30 m/s D) 3.0 × 109 m/s E) 0.80 × 107 m/s

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Temperature is a relative measure of

a. latent heat. b. hotness and coldness. c. internal energy. d. specific heat.

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A parallel plate capacitor with circular plates having radius 0.07 m and a dielectric with constant 2.2. If it is desired to store J in this capacitor, what must the separation distance be for a voltage of 1.5 kV?

A. 2.8 cm B. 5.5 cm C. 1.3 cm D. 0.90 cm E. 1.4 cm

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Collisions between low density continental plates create the tallest mountain chains, such as the Himalayas

Indicate whether the statement is true or false

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