Express planck's radiation law in terms of wavelength (a) as opposed to frequency. hint: start by performing a change of variable from v to 2 in equation 1.7 using c = va.

What will a positive and a negative charge do if they are separated from each other?

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?