The period of oscillation of a near-Earth satellite (neglecting atmospheric effects) is 84.3 min. What is the period of a near-Moon satellite? (R?= 6.37 × 10^6 m; RMoon= 1.74 × 10^6 m; m? = 5.98 × 10^24 kg; mMoon = 7.36 × 10^22 kg.)
a. 6.03 × 10^?3 min.
b. 0.713 min.
c. 84.3 min.
d. 108 min.
e. 140 min.
d
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A basketball player jumps to make a basket and remains in the air for a moment. A sportscaster then remarks that she has "defied gravity." Which of the following accurately describes the situation?
A) The player did stay in the air in spite of the Law of Gravitation, but a single counter-observation is not enough to warrant revisiting a theory that usually works. B) The player produced enough force with her legs to accelerate upward and remains above ground only until the acceleration of gravity brought her back down. C) The player can "defy gravity" because the Universal Law of Gravitation makes an exception for basketball players. D) The player has defied gravity, so scientists must go back into the lab to refine their theory.
A 78 kg object is travelling due North at 15.2 m/s, and experiences a constant net force of 1.72 kN toward the South. 0.75 s later, what will its velocity be?
A. 18.8 m/s, South B. 1.4 m/s, South. C. 1.4 m/s, North. D. 18.8 m/s, North. E. 16.5 m/s, North F. 16.5 m/s, South
Carbonaceous meteorites are believed to come from:
A) coal formed on Mars, then blown into space by asteroid impacts. B) the core of a differentiated type M asteroid, now broken up. C) the crust of a differentiated C type asteroid, now broken up. D) a broken up cometary nucleus, dark like Comet Halley's nucleus. E) deep space, far beyond the solar system, hence their very low density.
The most abundant gas in Earth's atmosphere is oxygen
Indicate whether the statement is true or false