Problem: Determine the equivalent resistance of a pair of 65.5 kΩ resistors that are connected in parallel. A proton is moving towards the Earth at a velocity of 4.75x107ms-1. It experiences a magnetic force of 1.83x10-16 N. Calculate the strength of the magnetic field if there is a 48o angle between the direction of the field and the proton's velocity.
A ray of light, emitted beneath the surface of an unknown liquid with air above it, undergoes total internal reflection at an angle of 47.2o. Determine the refractive index for the liquid.