Physics Answers

A particle of charge 4.25 x 10-⁹C moves at 3.0 x 10 ⁴ m/s at 60° up the x-y plane through a uniform magnetic field of

5.0 x 10-³T directed along the +z - axis. Find the magnetic force on a particle.

16. In a circuit 20 C of charge is passed through a battery in a given time. The plates of the battery are maintained at PD of 20 V . How much work is done by the battery?

The magnetic field strenght of a solenoid is 0.0270T. Its radius is 0.40 m and length is 0.40 m. How many turns are there in the solenoid if the steady current passing through it is 12.0 A?

A 12 mA steady current is flowing on a copper wire at a time interval of one

minute. Calculate the number of electrons passing on the copper wire

A section of iron wire having a diameter of 0.030 inch is measured to have a resistance of

2500

Ω (at a temperature of 20°C).

a. Determine the cross

-sectional area in square meters and in square millimeters.

(Note: 1 inch = 2.54 cm = 25.4 mm)

b. Calculate the length of the wire in meters.

3. Measurements shows that 500 muons fall on the top of Mt. Washington, altitude 2000m. Muons travel at 99% the speed of light or 0.99 x 3.0 x 10⁸ m/s.

a. Calculate the time in microseconds it would take muons to travel from the top of Mt. Washington to its base.

b. Use your calculation and the muon clock graph to find how many muons should reach the bottom of Mt. Washington.

. A compressed spring above the piston exerts a force of 60 N on the piston. If the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.

The range of projectile is 4 times of the height of projectile at an angle of?

A. 75

B. 76

C. 60

D. 90

two charges Q1=+3nC and Q2=-5nC are separated by a distance of 6cm and 2cm for point A amd 2cm and 10cm for point B (a) Calculate the electric potential at point A and point B.

(b) How much work is done by the electric field in a moving 4.00nC particle from point A and point B.

calculate the amount of electric potential energy possesses by a 2.5x10^-10C at a point where electric potential is 4.70 volts?