If the velocity ratio of a machine is 4, what does it mean?
Which of the following materials has a very large energy gap band?
A red shirt under a red light appears pale because red
An electron falls from an energy level of -5.44eV to another energy level, E. If the emitted photon is of wavelength 5.68 x 10\(^{-6}\)m, calculate the energy change. [ Plank's constant = 6.63 x 10\(^{-34}\)Js, emitted radiation speed = 3.0 x 10\(^8\)ms\(^{-1}\)]
Using the diagram above, the effective force pushing it forward at an angle 60º is
