A proton with mass 1.67 × 10^-27 kg moves in an accelerator with a speed of 0.600c. What is its total energy? (c = 3.00 × 10^8 m/s)
a. 3.26 × 10^-10 J
c. 0.540 × 10^-10 J
b. 1.88 × 10^-10 J
d. 2.51 × 10^-10 J
B
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If the net force on a body is zero the net torque ________ (is always, is not necessarily, cannot be) zero.
Fill in the blank(s) with the appropriate word(s).
Power: How many joules of energy are used by a 2.0 hp motor that runs for 1.0 hour? (1 hp = 746 W)
Fill in the blank(s) with the appropriate word(s).
A 50-kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 30.0° below the horizontal is applied to the box
The coefficient of static friction between the box and the surface is 0.40, and the coefficient of kinetic friction is 0.30. What is the force of friction on the box? A) 250 N B) 200 N C) 32 N D) 620 N E) 220 N
Imagine that the wave shown below moves right along a stretched string. It meets and passes through one of the left-going waves provided in the choices. For which choice is there an instant where the string is flat?
A. A
B. B
C. C
D. D
E. None of the above