In this book we repeatedly make estimates using the bohr model of the atom. test the validity of this approximation by calculating the k-shell binding energy, er(n-1): the l-shell binding energy, el(n = 2); the wavelength at the k-shell absorption edge, (nw = ek), and the k x-ray energy (ek-el) for si, ni, and w. compare with the accurate values given in the appendices.

Explain why you think this diagram shows what happened to the carbon in the biodome.

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d

Ablue car pulls away from a red stop-light just after it has turned green with a constant acceleration of 0.5 m/s 2 . a green car arrives at the position of the stop-light 6.5 s after the light had turned green. if t = 0 when the light turns green, at what time does the green car catch the blue car if the green car maintains the slowest constant speed necessary to catch up to the blue car? answer in units of s.