A black hole is a star whose gravitational field is so strong that light cannot escape from it
Indicate whether the statement is true or false
TRUE
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Mass on a Spring: A 0.16-kg block on a horizontal frictionless surface is attached to an ideal spring whose force constant (spring constant) is 360 N/m. The block is pulled from its equilibrium position at x = 0.000 m to a position x = +0.080 m and is released from rest. The block then executes simple harmonic motion along the horizontal x-axis. When the position is x = -0.037 m, what is the acceleration of the block?
A. 83 m/s2 B. 43 m/s2 C. 64 m/s2 D. 270 m/s2 E. 370 m/s2
Because a white dwarf is no longer burning fuel, it is more accurately described as being a
A) stellar remnant. B) failed star. C) protostar. D) black elf.
Harlow Shapley found the Milky Way was:
A) centered on the Earth. B) much smaller than previously thought. C) rapidly expanding. D) much larger than previously thought. E) uniformly spherical in shape.
What is the frequency of 20-mm microwaves? (c = 3.0 × 108 m/s)
A) 100 MHz B) 400 MHz C) 15 GHz D) 73 GHz