The energy associated with the stone from a height of 7.70 m can be calculated by multiplying the mass, gravitational acceleration and height. We do as follows:
Energy = mgh
Energy at 7.70 m = m(9.81)(7.70) = 75.537m
Energy at 5.25 m = 0.5mv^2 =75.537m
v = 12.29 m/s
The frequency cannot change, as it depends on the source. now, imagine light as a particle, when it's going through glass, which is a denser medium than air, is more tightly packed with particles than air is. think of it this way, will you walk faster in a crowd or on an empty street? going through the empty street (air) there are lesser objects to bump into so what do you think will happen to the speed now?
The answer is A,B,C that apply. I believe this is the answer i hope this helps have a good day.
93.64 grams
Explanation:mass of platinum =number of moles x molar mass molar mass = atomic mass of any element ,0.48 ×195.084 = 93.64 grams