Physics Answers

An isotope ²⁴Mg moves through a velocity selector of a mass spectrometer has an electric field of 150 Vcm^-1 and a magnetic field of 0.70 T. Calculate the velocity of the isotope that exits the velocity selector.

A plane of two turns coil of area 0.0127 m² is placed in a uniform magnetic field of 0.7 T. The current in the coils is 3 A. If the plane makes an angle of 50° with the magnetic field, calculate the torque exerted on the coil.

An electron moves in a uniform magnetic field. At a particular instant the speed of the

electron is 3.0x10^(6) m/s and the magnitude of the magnetic force acting on it is

5.0x10^(-13) N. The velocity of the electron makes an angle of 30^o with the direction of

the magnetic field. Calculate the magnetic field strength at that instant.

What is the magnitude and direction of the electric field at .35 m from a -6.5 x 10^-8 C point charge?

How is an electric field produced by an object with an electric charge?

How do charged bodies interact with other charged bodies?

The human hair is comb using a rubber comb. What charge acquired by the hair and by the comb?

3. A ball is thrown vertically upward with a speed of 30 ft/s from the edge of a cliff 50 ft above sea level with what velocity with it hit the water?

a. 32.2 ft/s b. 58.6 ft/s c. 64.2 ft/s d. 52.3 ft/s

If in the process oof rubbing the lenses of the eyeglasses, 6.28 x 10^10 electrons were transferred,

a) what is the charge of the lenses and the nylon cloth?

b) what is the change in their masses?

Calculate the specific weight, specific mass, specific volume and specific gravity of a liquid having a volume of 5 cubic meters and its weight is 35 kilo newton