In the context of black holes, if an object collapses to zero radius, its density and gravity _____
A) remain constant
B) increase
C) become infinite
D) decrease
C
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The two strongest forces that protons in a nucleus exert on each other are
A) the weak nuclear and electromagnetic forces. B) the weak nuclear and the gravitational forces. C) the electrostatic and the gravitational forces. D) the strong nuclear and the electrostatic forces.
Pre-main-sequence stars are above and to the right of the main sequence
a. True b. False Indicate whether the statement is true or false
Radioactive Decay: What happens to the half-life of a radioactive substance as we increase its temperature?
A. It does not change. B. It increases. C. It decreases at a constant rate. D. It decreases at an exponential rate.
An AM station is broadcasting at 980 kHz, while an FM station up the road is assigned 98 MHz. How do their carrier waves compare?
What will be an ideal response?