The stopping potential for electrons emitted from a surface illuminated by light of wavelength 507 nm is 0.780 v. when the incident wavelength is changed to a new value, the stopping potential is 1.42 v. (a) what is this new wavelength? (b) what is the work function for the surface?

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 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.

As seen in a us weather map, the h (or high) and l (or low) symbols indicate regions where surface air pressures are high or low, respectively, compared to surrounding areas. an h is plotted where the air pressure is highest and an l is plotted where the air pressure is lowest. proceeding outward and away from the center of a high pressure system, the air pressure "