Find the maximum velocity of a roller coaster with a mass of 3,320 kg when it reaches the bottom of a 83 meter drop

Explanation:

In the absence of friction, the potential energy at the top of a hill will equal the   kinetic energy at the bottom.

Assume that friction is negligible and velocity is essentially zero at the top.

½mv² = mgh

v = √(2gh)

v = √(2(9.8)83)

v = 40.333608...

v = 40 m/s   (145 kph)

low freq = 100 mhz

low wavelength =101.7m

length = 3x10^8/freq

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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