Answered: Einstein said that gravity exists…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Einstein said that gravity exists because: *

A. massive objects warp space.

B. of the existence of black holes.

C. massive objects attract one another.

D. light moves randomly throughout the universe.

How do scientists / astronomers spot a black hole? *

A. by using gamma rays and x-rays to detect high energy sources

B. by using radioactive waves to detect high energy sources

C. By using high energy to detect gamma rays and x-rays

D. By using massive telescopes to detect gamma ray

If you place your index just in front of you and try to look at it with you right eye open and your left eye close, then look at it with your left eye open and right eye close this time. You will notice that there is a slight change of the position of your index finger. What concept is applied how astronomers were able to measure the distance of heavenly bodies from the Earth? *

A. Cosmic distance ladder

B. Parallax

C. Luminosity

D. Transit

How is Doppler shift used in detecting extra solar planets? *

A. Scientists observe those stars which have red shift only.

B. Scientists observe those stars which have blue shift only.

C. Scientists observe those stars which do not have Doppler shifts.

D. Scientists observe those stars which have blue and red shifts periodically.

Planets around stars other than the sun have recently been discovered by: *

A. The variation in the Doppler shift in the star's spectrum.

B. The astrometric motion of the stars on the sky.

C. Direct imaging

D. It is impossible to detect planets around other stars

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