What is the period of a satellite circling Mars 100 km above the planet's surface? The mass of Mars is 6.42 × 1023 kg, its radius is 3.40 × 106 m, and G = 6.67 x 10-11 N•m2/kg2
A) 1.75 hours
B) 1.25 hours
C) 1.15 hours
D) 1.00 hours
E) 1.45 hours
A
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Conservation laws can be used even when the details of what is occurring inside a system aren't known
a. True b. False Indicate whether the statement is true or false
Which of the following is an example of convection?
a. Heat radiates from a planet into space. b. Heat travels from atom to atom, from inside a planet to the outside. c. Hot material inside a planet rises, and cool material sinks toward the center. d. Metal conducts energy throughout Earth's core.
An object with mass m and moment of inertia I is spinning with an angular momentum L. Its kinetic energy is:
a. 0.5I2/L. c. 0.5L2/m. b. 0.5L2/I. d. 0.5I2/m.
Process of Science: Given that Einstein's equations naturally showed the possibility of an accelerating Universe, why have astronomers only recently found strong evidence for dark energy?
What will be an ideal response?