A light wave travels at a speed of 3.0 × 108 meters/second. If the wavelength is 7.0 × 10-7 meters, what is the frequency of the wave?

What is the kinetic energy of a baseball moving at a speed of 40 m/s if the baseball has mass of 0.15 kg?

Which word expression describes how much to calculate pressure

A6.0-μf air-filled capacitor is connected across a 100-v voltage source. after the source fully charges the capacitor, the capacitor is immersed in transformer oil (of dielectric constant 4.5). how much additional charge flows from the voltage source, which remained connected during the process?