The speed of a particle moving in a circle 2.0 m in radius increases at the constant rate of 4.4 m/s2. At an instant when the magnitude of the total acceleration is 6.0 m/s2, what is the speed of the particle?
A. 3.9 m/s
B. 2.9 m/s
C. 3.5 m/s
D. 3.0 m/s
E. 1.4 m/s
Answer: B
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Binary black holes have much higher masses than their white dwarf and neutron star counterparts, which should lead to a much stronger emission of gravitational waves
What is the most reasonable explanation for why we have not yet observed gravitational waves from black-hole binaries? A) Black hole binaries are very rare, and wave detection is difficult. B) The waves disappear into the black hole. C) The waves must be coming from very far away and haven't reached us yet. D) Our current theories must be wrong.
State Newton's Law of Universal Gravitation
What will be an ideal response?
Just as a sustained flow of water in a hydraulic circuit needs a pump, the flow of charge in an electric circuit needs
A) current. B) voltage. C) resistance.
The gravitational field is equivalent to:
a. the inertial mass. c. a clock running slowly. b. an event horizon. d. an accelerated frame of reference.