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A gas of hydrogen-like ions is prepared in a particular excited state A. It emits photons having wavelength equal to the wavelength of the first line of the Lyman series together with photons of five other wavelengths. Identify the gas and find the principal quantum number of the state A
A 65 kg crate slides on a rough plane inclined upward at an angle of 28 degrees, what is the magnitude of the sliding friction force on the box, what is the coefficient of kinetic friction between teh box and the incline
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A 1.0-kg block of ice at -5ºC is dropped into a 55-gallon barrel of water at 80ºF. What is the final state of the mixture
A 54 kg person is parachuting and experiencing a downward acceleration of 2.0 m/s2. The mass of the parachute is 7.6 kg. (a) What is the upward force on the open parachute from the air? (b) What is the magnitude of the downward force on the parachute..
A 17,000-kg airplane lands with a speed of 82 m/s on a stationary aircraft carrier deck that is 115 m long. Find the work done by no conservative forces in stopping the plane.
A uniform sphere and a uniform cylinder with the same mass and radius roll at the same velocity side by side on a level surface without slipping. What will be the percentage difference of the heights
the magnitude jr of the current density in a certain cylindrical wire is given as a function of radial distance from
A car is rounding a level curve at 60 mph (approximately 27 m/s). At this speed, the car is right on the verge of having its tires slip so that it skids off the road. what is the radius of the curve
a parallel plate capacitor has a capacitance of 6.7 microf when filled with a dielectric. the area of each plate is 1.4
A 5kg block starts at rest at the top and slides down an inclined ramp that is 10 m high at the top. What is the velocity of the block when it is 5 m off the ground
A 2.93kg stone is tied to a thin, light wire wrapped around the outer edge of the uniform 9.83kg cylindrical pulley, Find the angular acceleration of the pulley
An air-filled toroidal solenoid has a mean radius of 14.6cm and a cross-sectional area of 4.95cm^2. What is the last number of turns that the winding must have
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