Which of the following best describes the energy transformations that take place when a battery-powered dvd player is used to watch a movie?

a. electromagnetic to sound
b. chemical to sound
c. electrical to chemical to sound and electromagnetic
d. chemical to electrical to sound and electromagnetic

The pressure increases by 1.0 x 104 n/m^2 for every meter of depth beneath the surface of the ocean. at what depth does the volume of a pyrex (bulk modulus 2.6 x 1010n/m^2) glass cube, 9.8 x 10^−2m on an edge at the ocean's surface, decrease by 7.5 x 10−10m^3? explain the formula beyond this point: p=1.0x10^4, b=2.6x10^10, l=9.8x10^−2, delta v=7.5x10^−10. at some point l needs to be cubed. why p is divided by delta v?

What kind of simple machine is a catapult?

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation