Atypical laboratory diffraction grating has 5.00x10^3lines/cm and these lines are contained in a 3.5cm width of grating. a. what is the chromatic resolving power of such a grating in the first order . b. could this grating resolve the line of the sodium doublet in the first order? while doing spectral analysis of a star you ate using this grating in the secondorder to resolve spectral lines that are very close to the 587.8002 nm spectral line of iron 1 for wavelength longer than the iron line . what is the shortest wavelength you could. distinguish from the iron line. for wavelength shorter than the iron line what is the longest wavelength you could distinguish from the iron line

Aroll in a paper machine is powered by a separately excited dc machine. operating point 1 (under load): the roll typically operates at 764 rpm and must provide 301 nm of torque to oppose the load of the paper. the armature voltage is 230v for this operating point operating point 2 (no load): when the load is removed the speed of the roll increases to 900 rpm (the field characteristics are unchanged) la ea dev m (a) calculate the maximum torque (units of nm) that the motor can supply with this applied voltage (b) calculate the value of the armature resistance, ra (in ohms) (c) at operating point 1 (loaded condition), the field current, i, and the total input power (armature field), are measured to be to be 10 a and 28,600 w respectively. use this information to calculate the value of the field resistance, rf (in ohms). (d) (d) at operating point 1 (loaded condition), calculate the motor efficiency. express your answer as a percent to at least 2 significant digits. (d) if the field voltage is reduced by 1/2, calculate the new stall torque (in nm) of the motor (f). if the field voltage is reduced by 1/2, calculate the new no-load speed (in rad/sec)

In a good thermo flask the main cause of heat loss is

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.