Our Sun, along with most of the stars in our neighborhood, probably formed:
A) a few million years ago.
B) about 10 million years ago.
C) hundreds of millions of years ago.
D) billions of years ago.
E) at the beginning of the universe.
D
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The laws of physics demand that a neutron star has a maximum mass of ____ solar mass(es)
a. 1 b. 1.4 c. 3 d. 8 e. 20
Free Fall: A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and experience no significant air resistance. If the 10-kg rock reaches a maximum height h, what maximum height will the 20-kg ball reach?
A. h/4 B. h/2 C. h D. 2h E. 4h
If the resistance in a constant voltage circuit is doubled, the power dissipated by that circuit will
A) increase by a factor of two. B) increase by a factor of four. C) decrease to one-half its original value. D) decrease to one-fourth its original value.
9/5 of a Fahrenheit degree is equivalent to
A) 273.16 K. B) 1°C. C) 1 K°. D) 1 C°. E) 373.16 K.