Select the correct answer.
Which statement best explains that sound waves are pressure waves?
A.
Sound waves have regions of compressions and rarefactions.
B. Sound waves cannot propagate through metals.
C. Sound waves move perpendicular to the medium particles.
D. Sound waves cannot propagate through water.

What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same? o a. resistance is directly related to length. ob. resistance is directly related to the square of the length. c. resistance is inversely related to the length. d. resistance is inversely related to the square of the length. reset next

Which accurately compares concave and convex lenses?

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)