Which type of friction keeps a mound of rocks from falling away from each other a) rolling friction b) static frictionc) cohesive frictiond) kinetic friction

How can you increase the strength of an electromagnet?

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.

Why does the liquid rise up through the dip tube when the valve is open