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Some positively charged particles passed un-deflected through perpendicular magnetic and electric fields. If the magnetic field strength was 0.650 T and the electric field strength was 2.10x10^5 N/C, what was the speed of the particles?
in a hydrogen atom in its lowest energy state the single electron and the single proton are separated by a tiny
Assume that the value of n in a radioactive transition in hydrogen changes only with unity, as is suggested by the correspondence principle. Estimate for what range of values of n the photon that is emitted will have wavelengths in the visible range ..
Compute the reduced stiffness [Q] and compliance [S] matrices, and the intralaminar shear stiffness [Q∗ ] and compliance [S ∗ ] matrices for a lamina with E1 = 35 GP a, E2 = 3.5 GP a, ν12 = 0.3, G12 = 1.75 GP a, G23 = 0.35 GP a.
The coefficient of area expansion of steel is 24 ? 10-6/°C.
A 3.0 m organ pipe is open at both ends and contains air. The velocity of sound in air is 331 m/s. What is the wavelength of the lowest frequency mode in m
Two very large parallel sheets are 5.00 apart. Sheet carries a uniform surface charge density of -8.60 , and sheet , Find the magnitude of the net electric field these sheets produce at a point 4.00 to the right of sheet
four passengers with combined mass 250 kg compress the springs of a car with worn out shock absorbers by 4.00cm when
A horizontal force of 750 N is needed to overcome the force of static friction between a level floor and a 250 kg crate. What is the acceleration of the crate if the 750 N forces is maintained after the crate begins to move and coefficient of kine..
A compound microscope has a 18-cm-long barrel and an objective lens with a focal length of 8.0 mm. What is the focal length of the eyepiece to give a total magnification of 240
A 290kg metal box is on an incline of 29 degrees and slides down4.3 m. It is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coeff of kinetic friction is 0.40.
A person standing on a bridge 120m above a river drops a 250g rock. At what speed does the rock hit the water
A falling stone takes ?t = 0.26s to travel past a window2.2 m tall, From what height above the top of the window did the stone fall
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