The gravitational red shift is caused by

A) gravitational lensing.
B) rotating black holes.
C) time dilation.
D) Rayleigh scattering in the atmosphere.


C

Physics & Space Science

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At a pressure of 1 atmosphere, a mixture of two metals (A and B) has the three phases ?, ?, and ? in equilibrium. Can the temperature be changed and still have the ?, ?, and ? phases in equilibrium? _____________

Fill in the blank(s) with the appropriate word(s).

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Some quasars have fuzz around them that produce spectra similar to normal galaxies

Indicate whether the statement is true or false

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What is the intensity of a 70. dB sound?

What will be an ideal response?

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A flat horizontal plate of area 400 cm2 is dragged over a 0.20 cm thick layer of oil at a speed of 30.0 cm/s. The oil is resting on a fixed horizontal surface. It takes a force 1.20 N applied to the plate to sustain this speed

What is the viscosity of the oil? A) 6.00 kg/m • s B) 20.0 kg/m • s C) 60.0 kg/m • s D) 0.200 kg/m • s E) 200 kg/m • s

Physics & Space Science