If energy is released when the parts of a system are allowed to disperse to infinity, its binding energy is
A. Positive.
B. Negative.
C. Zero.
D. Not defined in such a case.
B. Negative
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A teaspoonful of neutron star material on Earth would weigh
A) about the same as a teaspoonful of Earth-like material. B) a few tons. C) more than Mt. Everest. D) more than the Moon. E) more than Earth.
A diver in midair is pulled toward the pool below by the force of gravity from Earth. Earth experiences an upward force from the diver that ________.
A. is greater than the force on the diver by Earth B. is less than the force on the diver by Earth C. is equal to the force on the diver by Earth D. There is no upward force by the diver on Earth. E. There is insufficient information to determine the gravitational pull on Earth by the diver.
What is the frequency of yellow-green light that has a wavelength of 550 nm?
In ultrasound the __________ of the sound is much greater than in normal sound
Fill in the blank(s) with correct word