Infrared radiation has wavelengths ranging from about 800 nm to 1 mm. What is the corresponding frequency of radiation of a wavelength of 970 nm?.

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.

Of is j/kg·k. if a 2.6 kg of isk to k,is ?