The temperature at witch the velocity of sound in oxygen gas becomes equal to the velocity of sound in hydrogen gas at 0c is
1)0c 2)273c 3) (273 x 4)c 4) (273 x15) c 5) (273x16) c

Explanation:

Trinklein, Frederick E. Modern Physics. New York. 1990: 256. "The speed of sound in air is 331.5 m/s at 0 °C."

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )