Why couldn't Newton determine the value of the gravitational constant?
a. The constant was too large to measure with existing instruments.
b. The constant was too small to measure with existing instruments.
c. If the gravitational constant were known, the mass of Earth could be calculated.
d. Although Newton believed there was a constant, no one has ever discovered one.
e. Although the right equipment and techniques for this measurement existed, Newton did not have access to them.
b
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The Moon is about one-quarter the diameter of Earth. How does its mass compare?
A. The Moon is 1/81 as massive as Earth. B. The Moon is 1/4 as massive as Earth. C. The Moon is 1/6 as massive as Earth. D. The Moon is 1/32 as massive as Earth.
Which of the following is an advantage that liquid water has as a biological solvent compared to other alternatives?
A) when it freezes it becomes less dense B) it is a liquid over a wide temperature range and remains liquid at higher temperatures C) it is able to dissolve many things D) all of these are advantages
A bank vault is opened by applying a force of 140 N perpendicular to the plane of the door, 1.20 m from the hinges. Find the torque due to this force about an axis through the hinges
a. 117 N·m b. 308 N·m c. 140 N·m d. 168 N·m e. 154 N·m
Near the surface of the planet, the Earth's magnetic field is about 0.50 × 10^?4 T. How much energy is stored in 1.0 m3 of the atmosphere because of this field?