Which of the following quantities expressed in derived units includes the unit of length?

a. Area
b. Volume
c. Speed
d. Density
e. All of these


e

Physics & Space Science

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The look-back time is

a. the time it takes for the light from an object to reach Earth. b. numerically equal to the distance in light-years. c. smaller for more distant objects. d. all of the above e. a and b above

Physics & Space Science

An important factor in producing and controlling a fission chain reaction is the fact that _________ neutrons are much better a causing fission in uranium-235

Fill in the blank(s) with correct word

Physics & Space Science

An organ pipe closed at one end and open at the other end has two successive harmonics with frequencies of 2170 Hz and 2790 Hz. What is the fundamental frequency of the pipe?

What will be an ideal response?

Physics & Space Science

Applying Newton's version of Kepler's third law (or the orbital velocity law) to the a star orbiting 40,000 light-years from the center of the Milky Way galaxy allows us to determine

A) the mass of the Milky Way Galaxy that lies within 40,000 light-years of the galactic center. B) the total mass of the entire Milky Way Galaxy. C) the mass of the black hole thought to reside in the center of the galaxy. D) the percentage of the galaxy's mass that is made of dark matter.

Physics & Space Science