Simple Harmonic Motion: If your heart is beating at 76.0 beats per minute, what is the frequency of your heart's oscillations in hertz?
A. 4560 Hz
B. 1450 Hz
C. 3.98 Hz
D. 2.54 Hz
E. 1.27 Hz
Answer: E
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A ball thrown into the air follows a parabolic trajectory. At the highest point in the trajectory
A. both the velocity and the acceleration are zero. B. the velocity is zero, but the acceleration is not zero. C. neither the acceleration nor the velocity are zero. D. the acceleration is zero but the velocity is not zero.
The far side of the Moon was first mapped
A) by early Russian spacecraft. B) by Galileo in 1610 with his first telescope. C) by NASA with its Lunar Orbiters in the 1960s. D) by the Apollo astronauts on the first orbit of the Moon with Apollo 8. E) by William Herschel with his large reflectors in the early 1800s.
In the H-R diagram, what are the two most important types of data plotted?
A) sizes and temperatures B) luminosities and masses C) absolute and apparent magnitudes D) apparent magnitudes and temperatures E) spectral classes and absolute magnitudes
The positively charged particle inside an atom is the
a. electron b. proton c. neutron d. nucleus e. none of the above