A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5.0 sin (?t + ?/3). The velocity (in m/s) of the body at t = 1.0 s is
a. +7.9
b. ?7.9
c. ?14
d. +14
e. ?5.0
b
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What is the Big Bang theory?
A) the idea that the universe as we see it formed when two massive galaxies collided together B) the idea that all matter and energy in the universe began in an unimaginably dense state, and then space itself began expanding C) the idea that the galaxy formed from the supernova explosion of a massive star
A star is seen to have two transiting planets. Planet 1 transits every 3 months, and Planet 2 transits every 15 months. What can we infer about their orbits?
A) Planet 2's semimajor axis is larger than Planet 1's. B) Planet 1's orbit is more eccentric than Planet 2's. C) Planet 2's orbit is more eccentric than Planet 1's. D) Planet 1's semimajor axis is larger than Planet 2's.
Comets are visible chiefly because of reflected ______________
Fill in the blank(s) with correct word
The point along a planet's orbit where it is closest to the Sun is called the orbit's
A) period. B) perihelion. C) eccentricity. D) semi-major axis. E) aphelion.