Which of these two collisions is more damaging; driving into a concrete wall with no "give," or colliding head-on with an identical car moving toward you at your same speed?
A) collision with the car
B) collision with the wall
C) both the same
Answer: C
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In general, ____
a. spiral galaxies are the most common galaxies, and are make up most of the cataloged galaxies b. elliptical galaxies are the most common galaxies, and are make up most of the cataloged galaxies c. most cataloged galaxies are spiral, but dwarf galaxies are the most common d. most cataloged galaxies are elliptical, but spiral galaxies are the most common e. most cataloged galaxies are spiral, but elliptical galaxies are the most common.
Photon Energy: If the wavelength of a photon is doubled, what happens to its energy?
A. It is reduced to one-half of its original value. B. It stays the same. C. It is doubled. D. It is increased to four times its original value. E. It is reduced to one-fourth of its original value.
The figure shows a ‘snapshot’ of four different waves in identical ropes stretched with the same force
The wave where the speed is greatest is
a.
I.
b.
II.
c.
III.
d.
IV.
e.
all of the above.
When light of wavelength 700 nm is used in a single-slit diffraction pattern, the central maximum has a width of 3.5 cm. When the light source is replaced by one of wavelength 500 nm, what central width will result?
A. 3.5 cm B. 3.0 cm C. 2.5 cm D. 4.9 cm E. 4.0 cm