Which of the following best describes a sound level of intensity 1 W/m2?
a. extremely loud
b. about that of a power mower
c. normal conversation
d. like a whisper
a
You might also like to view...
The Milky Way galaxy contains about ________ stars
Fill in the blank(s) with correct word
Kepler's second law implies that
a. a planet should move at its greatest speed when it is closest to the Sun. b. the most massive planets will have the greatest speed in their orbits. c. the speed of a planet in its orbit depends on the size of the epicycle. d. the mass of the planet determines how far the planet is from the Sun. e. the deferent and the epicycle have to be attached to the Sun and not Earth.
Refracting Telescope: A refracting telescope has a magnification M. If the focal length of the objective lens is doubled and the eyepiece focal length is halved, what is the new magnification?
A. 4M B. 2M C. M/2 D. M/4 E. M
You see a crescent Moon setting after the Sun sets. Is it waning or waxing?
A) can't distinguish based on the information provided B) waxing C) waning