What is gravitational lensing? According to general relativity, why does it occur?
What will be an ideal response?
It is the distortion of the appearance of distant objects due to gravity and occurs because their light passes through regions of space that are curved.
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A mass is attached to a spring. It oscillates at a frequency of 4.0 Hz when displaced a distance of 2.0 cm from equilibrium and released. What is the maximum velocity attained by the mass?
A) 0.08 m/s B) 0.32 m/s C) 0.02 m/s D) 0.40 m/s E) 0.50 m/s
The primary purpose of adding chromium to stainless steel is to improve the resistance to _________.
Fill in the blank(s) with the appropriate word(s).
Doubling the distance between two objects halves the gravitational force between them
Indicate whether the statement is true or false
The wavelength of a radio wave from an FM station broadcasting at 93.9 megahertz on your radio dial is 0.313 meters
a. True b. False Indicate whether the statement is true or false