3. What is the total mechanical energy of that ball in the ball return when it comes back from striking the pins if it is .8m above the ground and moving at 1.2m/s?o
ME=mgh + 1/2mv^2 m=6kg
ME= 6kg(9.8m/s^2)(0.8) + 1/2(6kg)(1.2m/s)

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

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.

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force