A car moving initially with velocity v0 with deceleration a comes to a full stop after traveling a distance d. We can say that the velocity of the car after traveling a distance d/2 is
A) greater than v0/2.
B) equal than v0/2.
C) smaller than v0/2.
D) has no relationship to v0.
A
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Most of the light that makes the hazy band of the "milky way" visible in the night sky comes from reflection and emission nebulae
a. True b. False Indicate whether the statement is true or false
If satellite A is in a 2:1 resonance with satellite B, this means that:
A) satellite A is twice as large as satellite B. B) satellite A moves twice as fast as satellite B. C) satellite A completes one orbit for every two orbits of satellite B. D) the orbit of satellite B takes twice as long to complete as that of satellite A. E) satellite B spins on its axis one time for every two orbits of satellite A.
In its lowest quantum state, the energy of a diatomic harmonic oscillator is
A) (1/4)hf. B) (1/2)hf. C) hf. D) 2hf. E) (3/2)hf.
How do astronomers detect the movement of galaxies?
A. the steady dimming of the galaxy's light B. the disappearance of the most distant galaxies as they move past the cosmic horizon C. the shift in spectral lines of the galaxies D. the rapid brightening of the galaxy's light