How are elements more massive than iron produced?
A) inside white dwarfs
B) inside two merging white dwarfs
C) inside neutron stars
D) inside two merging neutron stars
D
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Which of the following is a consequence of the laws of thermodynamics?
A.Heat can be completely changed into work B.Heat transfers from a cold object to a hot object until equilibrium is reached
C.Atoms can be at any temperature, even absolute zero D.Work can be completely changed into heat
The escape velocity from the Moon is 2.4 km/s. If an astronaut hits a golf ball such that it just reaches this speed, the ball will ________.
A. follow a very elliptical orbit around the Moon B. continue moving away from the Moon, never to return C. move away from the Moon, but return some time later D. either orbit the Moon or escape its gravitational pull, depending on the direction the ball is hit
When water evaporates from the ocean and rises into the atmosphere, the energy transformation is
A) radiant energy ? gravitational energy. B) gravitational energy ? electromagnetic energy. C) kinetic energy ? thermal energy. D) chemical energy ? gravitational energy. E) chemical energy ? thermal energy.
Mass on a Spring: A 0.150-kg air track cart is attached to an ideal spring with a force constant (spring constant) of 3.58 N/m and undergoes simple harmonic oscillations. What is the period of the oscillations?
A. 2.57 s B. 0.527 s C. 0.263 s D. 1.14 s E. 1.29 s