In a hot star, a multiply ionized atom with a single remaining electron produces a series of spectral lines as described by the bohr model. the series corresponds to electronic transitions that terminate in the same final state. the longest and shortest wavelengths of the series are 63.3 nm and 22.8 nm, respectively. (a) what is the ion? (b) find the wavelengths of the next three spectral lines

nearest to the line of longest wavelength.

Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?

70 give a real life example showing how sensory neurons work with the motor neurons

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?