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Find the total number of lines in a 3.0cm -wide diffraction grating whose third-order spectrum has the 660nm hydrogen theta spectral line at an angular position of 41degree celcius.
The bugle and the Bach - Trumpet have no keys and thus play only the natural scale (open pipes). If the lowest note you can play on a bugle is D2 (73.42 Hz), what other notes can you play
Calculate the UNCERTAINTY of the specific gravity of a liquid given the following information: m = 54.50 +/- 0.05 grams, mA = 33.50 +/- 0.05 grams
In a television picture tube, electrons strike the screen after being accelerated from rest through a potential difference of 20000 V. find the electron speed just before the electron strikes the screen
A cancer patient is undergoing radiation therapy in which protons with an energy of 1.2 MeV are incident on a 0.25 Kg tumour. (a) If the patient receives an effective dose of 1.0 rem, what is the absorbed dose? (b) How many protons are absorbed by..
A horizontal slingshot consists of two light, identical springs (with spring constants of 90 N/m) and a light cup that holds a 1-kg stone. Determine the system's total mechanical energy
A patient with a dislocated shoulder is put into a traction apparatus, How large should these pulls be
A circular coil of 57 loops and diameter 30.0cm is lying flat on a tabletop, and carries a clockwise current of 1.90A . A magnetic field of 0.370T , What is the torque on the coil
Two people with a combined mass of 123kg hop into an old car with worn-out shock absorbers. Find the total load supported by the springs
A copper rod of cross-sectional area 11.2 cm2 has one end immersed in boiling water and the other in an ice-water mixture, which is thermally well insulated except for its contact with the copper. How many grams of ice melt each second
A paratrooper pilot fell 360 m after jumping without his parachute opening. He landed in a snow bank, creating a crater 1.50 m deep, but survived with only minor injuries. Assume the pilot's mass was 80 kg and his terminal velocity was 50 m/s.
A large, cold (1.20 C) block of iron is immersed in a tub of hot (99.7C) water. Calculate the change in entropy of the system this time
An electric dipole has opposite charges of 5.0x10^-15 C separated by a distance of .40mm. Determine the magnitude of the torque exerted on the dipole by the electric field
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