After a massive-star supernova, what is left behind?
A) always a white dwarf
B) always a neutron star
C) always a black hole
D) either a white dwarf or a neutron star
E) ether a neutron star or a black hole
E) ether a neutron star or a black hole
Physics & Space Science
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Arcturus has an mV = –0.04 and MV = –0.3 . Its distance is 10^–3.4 pc
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
If two vectors are perpendicular to each other, their cross product must be zero
A) True B) False
Physics & Space Science
The open universe would require ?o be less than zero
Indicate whether the statement is true or false
Physics & Space Science
Acceleration, a, velocity, v, and displacement, s, can be related to each other without the use of time as:
A. v dv = a ds. B. v = a d2/ds2. C. a dv = v ds. D. a = v d2v/ds2.
Physics & Space Science