The Moon lacks an atmosphere because its surface gravity is only ________ the Earth's
Fill in the blank(s) with correct word
one-sixth
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What is the approximate diameter of the roundish region with a temperature of 300—500 K?
This frame from Figure 16.12 is from a supercomputer model of the formation of one of the first stars in the universe. Color indicates gas temperature: Blue and green represent cool gas (100—300 K), orange and red represent warm gas (500—3000 K), and yellow represents gas at intermediate temperatures (300—500 K). Use the information in the figure to answer the following questions.
Which of the following correctly describes what we mean by a great circle on the surface of the Earth?
A) any circle whose center is at the center of the Earth B) any circle of latitude C) any circle larger than 10,000 km in diameter D) a circle of longitude
If a block is set sliding on a huge imaginary frictionless plane in contact with Earth's surface, it will NOT sustain a constant speed because
A) a component of gravitational force parallel to the plane soon acts on it. B) gravity gets weaker as distance increases. C) it is not free from the shackles of Earth's gravity. D) of its inertia.
Hector drives a pickup truck horizontally at 9.00 m/s. He is transporting a crate of delicate lead crystal. If the coefficient of static friction between the crate and the truck bed is 0.740, what is the minimum stopping distance for the truck so the crate will not slide?
a. 5.58 m b. 6.66 m c. 81.0 m d. 15.6 m e. 2.79 m