Which one of the following frequencies of a wave in the air can be heard as an audible sound by the human ear?
a. 1,000 hz
b. 100,000 hz
c. 0.10 hz
d. 10 hz

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

A4.0-cm tall light bulb is placed a distance of 32.0 cm from a concave mirror having a focal length of 16.0 cm. determine the image distance

Scientist have use computer models to create a series of maps that show how susceptible coastal cities in island countries are to the sea rising at different levels.the map shows that a 1 meter rise would swap cities all along the us eastern seaboard. a 6-meter sea level rise with sub merge a large part of florida. thermal expansion has already raise the oceans 10 to 20 centimeters the most likely cause,directly and indirectly, for such a rise in sea level is