The force of repulsion between two like–charged table tennis balls is 8.2 × 10-7 newtons. if the charge on the two objects is 6.7 × 10-9 coulombs each, what is the distance between the two charges? (k = 9.0 × 109 newton·meters2/coulomb2)

If steel is more dense that lake water, why can a boat float

The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?

We will use a video to study faraday’s law of electromagnetic induction by analyzing the induction that occurs due a coil of copper wire sliding along an air track that passes through an external magnetic field. specifically, we will: examine some of the main principles behind faraday’s law. apply lenz’s law to determine the direction of the induced emf. take measurements of the induced emf from the voltmeter as the coil passes into and out of the external magnetic field. use the horizontal scale provided to determine the speed of the coil. calculate the magnetic field induced in the coil as it passes into and out of the external magnetic field.