Centripetal means
a. center seeking
b. pulls outward
c. constant
d. fast
e. none of these
a
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What is "uncertain" in the Heisenberg Uncertainty principle?
A. The energy of the particle when it has wave properties B. The exact number of protons in the nucleus C. The value of the particle's position when the particle's momentum is known precisely D. The value of the Planck's constant E. The time period of the wave describing the particle
The great contribution of Nicholas Copernicus was to
A) create a detailed model of our solar system with the Sun rather than Earth at the center. B) prove that the Earth is not the center of the universe. C) discover the laws of planetary motion. D) discover the law of gravity.
According to general relativity, a photon emitted by a star
A) loses energy. B) reduces in frequency. C) is red-shifted. D) all of the above E) none of the above
The acceleration of gravity can vary locally on the Earth's surface because of the presence of rocks of different densities
Indicate whether the statement is true or false