An object is at rest on an inclined plane. in which direction does the static friction force act? 1) opposite to the direction of the gravitational force 2) in the direction of the gravitational force 3) in the direction of the normal force 4) along the surface of an inclined plane in an upward direction

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j

Research and discuss the aurora borealis in terms of electric charges, magnetic fields, and forces. which times of the year are best for seeing the northern lights, and where are the best places to view them? explain your answers. also identify links to good images. if you’ve ever seen the aurora borealis, describe your experience and note the time and place that you saw it.