Physics Answers

Two point charges reacted with each other to produce 4.32 x 10⁻⁴ J. the magnitude of q is 27 nC with a distance from the point charge of 19 cm. Find the magnitude of the point charge

Find the electric flux in a sphere of radius 0.48 cm from a charge of 55 nC.

A tennis ball of mass 0.0551kg is served. It strikes the ground with a velocity of 54.0m/s at an angel of 22° below the horizontal. Just after the bounce it is moving at 53.0m/s at an angel of 18° above the horizontal. If the interaction with the ground lasts 0.0610 s, what is the magnitude of the average force exerted by the ground on the ball?

An archer shoots an arrow towards a 300g target that is sliding in her direction at a speed of 2.50m/s on a smooth frictionless surface. The 22.5g arrow is shot with speed of 35m/s and passes through the target without changing the mass of the target, which is stopped by the impact. Calculate the speed of the arrow after passing through the target?

Two particles have a total mass of 10.0g. Particle A is located on the x-axis at xA=2.0 cm, while particle B is located on the x-axis at xB=4.0 cm. The center of mass of this two-particle systems is located at xcm=3.4 cm. Calculate the mass of each particle?

A 0.010 0-kg wire, 2.00 m long, is fixed at both ends and vibrates in its

simplest mode under a tension of 200 N. When a vibrating tuning fork is placed

near the wire, a beat frequency of 5.00 Hz is heard. (a) What could be the

frequency of the tuning fork? (b) What should the tension in the wire be if the

beats are to disappear?

A 0.010 0-kg wire, 2.00 m long, is fixed at both ends and vibrates in its

simplest mode under a tension of 200 N. When a vibrating tuning fork is placed

near the wire, a beat frequency of 5.00 Hz is heard. (a) What could be the

frequency of the tuning fork? (b) What should the tension in the wire be if the

beats are to disappear?

A proton makes a (radius = 30.0 cm) circular orbit in a 2.5 T magnetic field. What is the velocity of the proton?

mass of proton = 1.67x10^-27 kg, e = 1.602x10^-19 C

A proton makes a (radius = 30.0 cm) circular orbit in a 2.5 T magnetic field. What is the velocity of the proton?

mass of proton = 1.67x10^-27 kg, e = 1.602x10^-19 C

A taut string, fixed at both ends, is driven by an oscillator at a constant frequency of 175 Hz. The amplitude of each of the two interfering waves that produce the standing wave is A = 3 mm. In the observed standing wave pattern, the maximum transverse speed at an antinode is: