Asimple atwood's machine uses two masses, m1 and m2. starting from rest, the speed of the two masses is 2 m/s at the end of 5 s. at that instant, the kinetic energy of the system is 87 j and each mass has moved a distance of 5 m. determine the values of m1 and m2.

What would the difference of spectral lines emitted by hydrogen gas in distant galaxies which is normally found at a wavelength of 21 cm on earth, be observed at 21.1 centimeters?

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering