If you were in a rocket ship in distant space, far from all gravitational influences, and accelerating at 2g, you would feel
A) your normal weight.
B) twice your normal weight.
C) weightless.
D) This cannot be answered without knowing your speed.
B
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Stars in a star cluster
a. all have the same age. b. all have the same chemical composition. c. all have the same luminosity. d. all of the above e. a and b above
Calorimetry: A 35-g block of ice at -14°C is dropped into a calorimeter (of negligible heat capacity) containing 400 g of water at 0°C. When the system reaches equilibrium, how much ice is left in the calorimeter? The specific heat of ice is 2090 J/kg ? K, that of water is 4186 J/kg ? K, and the latent heat of fusion of water is 33.5 × 104 J/kg.
A. 32 g B. 33 g C. 35 g D. 38 g E. 41 g
The central peak of a crater is formed by ________.
A. ejected material falling back into the crater B. molten rock being thrown upward and then solidifying C. the upward rebounding of compressed rock D. regolith drifting toward the center of the crater E. None of these choices are correct.
A string is stretched and fixed at both ends, 200 cm apart. If the density of the string is 0.015 g/cm, and its tension is 600 N, what is the fundamental frequency?
A. 316 Hz B. 632 Hz C. 158 Hz D. 215 Hz E. 79 Hz