If a planet has 9 times the radius of the Earth, but has the same density as the Earth, what is the gravitational acceleration at the surface of the planet? (g = 9.8 m/s2)
a. 29.4 m/s2
c. 265 m/s2
b. 88.2 m/s2
d. 39.2 m/s2
Question 2
An Earth satellite is orbiting at a distance from the Earth's surface equal to two Earth radii. At this location, the acceleration due to gravity is what factor times the value of g at the Earth's surface?
a. There is no acceleration since the satellite is in orbit.
b. 1/9
c. 1/4
d. The answer is not given.
Humanmade pollutants may be driving the expansion of the Earth’s tropical belt seen
The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star
Lobster in a bucket looks like a gigantic monster on a metallic planet, and...
Pneumonia patient’s chest x-ray. Note the irregular areas of density.
The Arctic is warming faster than any other region on Earth
A 5.0-m radius playground merry-go-round with a moment of inertia of 2000 kg ∙ m2 is rotating ...