Describe the arguments supporting the idea that quasars are at the distances indicated by their redshifts.

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 3.33 times a second. A tack is stuck in the tire at a distance of 0.309 m from the rotation axis.

A guitarist is tuning a guitar. She hears a low beat every 2.0 seconds. What is the difference between the correct frequency and measured frequency of the guitar string?

Which factor affects elastic potential energy but not gravitational potential energy? spring constant acceleration due to gravity distance from a given position amount of matter in the object

How to know if an element is a good conductor?

Which of the following is NOT a factor that affects the apparent brightness of a star as seen from Earth? A. how old the star is B. how big the star is C. how hot the star is D. how far away the star is

How is ecology diffrent from earth science

Which theory was first proposed by Albert Einstein? A. the theory of special relativity B. the theory of universal gravitation C. the theory of inertia D. the theory of radioactivity ... the answer is A i just found out

For each of the following, describe the relationship as directly or inversely proportional: a) wavelength vs. frequency b) wavelength vs. energy c) frequency vs. energy ... ?

Can hand sanitizer be used as rubbing alcohol

Two objects experience a 12 N electrical force between them. What force will the objects experience if the distance between them is doubled?