An ideal spring has a spring constant (force constant) of 60 N/m. How much energy does it store when it is stretched by 1.0 cm?
A) 0.30 J B) 60 J C) 0.0030 J D) 600 J
C
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A man pulls a sled at a constant velocity across a horizontal snow surface. If a force of 85 N is being applied to the sled rope at an angle of 56° to the ground, what is the force of friction between sled and snow?
a. 85 N b. 70 N c. 48 N d. 5 N e. 43 N
Uncharged particles in an atom are called ________.
A. neutrinos B. protons C. positrons D. electrons E. neutrons
The energy released from a nuclear reaction is equal to:
a. energy associated with momentum conservation. b. the exothermic endothermy. c. energy associated with the change in mass. d. the total charge involved.
When light passes through two or more narrow slits, an alternating dark and bright pattern is observed on a screen because of
a. interference b. diffraction c. specular reflection d. diffuse reflection e. polarization