An oil drop of mass 6.6x10^-14 Kg is
Suspended in an electric field of 2.0 x 10^-14
NC between horizontal plates that are
4.0x10^-2am apart. The number of excess
elections on the oil drop is

A)1 C)5
B)2 D)20

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?

Which two particles are found in the center of an atom

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.