Which equations represent the relationship between wavelength and frequency for a sound wave? Check all that apply.

v = lambdaf

A = vf

f = v

A = StartFraction v over f EndFraction.

A = StartFraction f over v EndFraction.

f = StartFraction v over f EndFraction.

f = StartFraction lambda over v EndFraction.

A40.0 l tank of ammonia has a pressure of 12.7 kpa. calculate the. volume of the ammonia if it’s pressure is changed to 8.4 kpa while its temperature remains constant.

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2