(OT 100) Sedimentation as a method of water purification results in
O
a. an increase in the bacterial count.
b. a decrease in the amount of organic matter.
c. an increase in the amount of hydrogen.
d. a more rapid water flow.
e. the destruction of vitamins.
O
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o

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90