An object moving at a constant speed requires 6.0 s to go once around a circle with a diameter of 4.0 m. What is the magnitude of the instantaneous acceleration of the particle during this time?
a. 2.2 m/s2
b. 2.7 m/s2
c. 3.3 m/s2
d. 3.8 m/s2
e. 4.4 m/s2
a
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Two thermometers are calibrated, one in degrees Celsius and the other in degrees Fahrenheit. At what temperature (in kelvins) do their readings measure the same temperature?
a. 218.15 b. 233.15 c. 273.15 d. 40.15 e. 0
When you touch a piece of ice,
A) work flows from your hand to the ice. B) chemical energy flows from the ice to your hand. C) thermal energy flows from the ice to your hand. D) work flows from the ice to your hand. E) thermal energy flows from your hand to the ice.
What simple observation inspired Alfred Wegener's hypothesis of continental drift?
What will be an ideal response?
A 1500-kg car moving at 25 m/s hits an initially uncompressed horizontal ideal spring with spring constant (force constant) of 2.0 × 106 N/m. What is the maximum distance the spring compresses?
A) 0.17 m B) 0.34 m C) 0.51 m D) 0.68 m