If the momentum of an object is doubled, its speed must have increased by
A. 4
B. 2
C. 0.5
D. 0.25
B. 2, since p = mv
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Two identical balls are at rest and side by side at the top of a hill. You let one ball, A, start rolling down the hill. A little later you start the second ball, B, down the hill by giving it a shove. The second ball rolls down the hill along a line parallel to the path of the first ball and passes it. At the instant ball B passes ball A:
A. it has the same position and the same velocity as A. B. it has the same position and the same acceleration as A. C. it has the same velocity and the same acceleration as A. D. it has the same displacement and the same velocity as A. E. it has the same position, displacement and velocity as A.
__________is an apparent change in the wavelength of radiation caused by relative motion of a source and observer
A) The black drop effect B) The Doppler effect C) The Casimir effect D) The common ion effect
How does Venus release its interior heat?
a. Through solar wind b. Through active plate tectonics c. Through large convective currents of hot magma that rise beneath its crust d. Through periodic outgassing of the atmosphere e. Through CO2 outgassing
How big are nebulae in size?
A.) 10^5 m. B.) 10^10 m. C.) 10^25 m. D.) 10^17 m. E.) 10^50 m.