In eq. (10.1) in the lab manual, the constant rhoυ is 41.1 gm-cm^{-2} −2 sec^{-1} −1  in air. a piece of paper has a mass per unit area of approximately 7x10^{-3} −3 gm/cm^{2} 2 . if the frequency is 3.6 khz, what does theory predict for the ratio of the transmitted amplitude to the incident amplitude of the sound wave? (a sound wave is a pressure wave.)

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

the answer is b, have negligible mass