Our Sun is a first-generation star.
Answer the following statement(s) true (T) or false (F)
Ans: False
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Energy Conservation With Conservative Forces: A rock falls from a vertical cliff that is 4.0 m tall and experiences no significant air resistance as it falls. At what speed will its gravitational potential energy (relative to the base of the cliff) be equal to its kinetic energy?
A. 3.1 m/s B. 4.4 m/s C. 6.3 m/s D. 8.9 m/s E. 13 m/s
After a supernova event, 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) either a neutron star or a black hole
The first to be credited with the idea that energy was quantized was
A) Max Planck. B) Albert Einstein. C) both Planck and Einstein at about the same time.
An astronaut has landed on another planet and conducts an experiment to determine the acceleration of gravity on that planet. She uses a pendulum 0.640 m long and determines that the period of oscillation is 2.60 s
What is the acceleration of gravity on that planet? A) 4.85 m/s2 B) 1.66 m/s2 C) 3.74 m/s2 D) 2.39 m/s2 E) 9.81 m/s2