The speed of sound in fresh water at 293k is 1482 m/s. at what temperature is the speed of sound in helium gas the same as that of fresh water at 293k? helium is considered a monatomic ideal gas (y = 1.67 and atomic mass = 4.003u).
a)442k
b)377k
c)525k
d)313k
e)633k

A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

Find v1, the speed of the fluid in the left end of the main pipe. express your answer in terms of h1, h2, g, and either a1 and a2 or γ, which is equal to a1a2.