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A hydrogen like ion Mg 11+ drops from its n=2to its n=1 level. What is the wavelength of the photonemitted? What sort of radiation is this?
A toy car of mass 1.0 kg is stationary, and a child rolls a toy truck of mass 4.7 kg straight toward it with a speed of 3.2 m/s. What is the velocity of the center of mass of the system consisting of the two toys
what is the maximum instantaneous power dissipated by a3.0hp pump connected to a 240-Vrms ac power source, what is the maximum current passing through the pump
You drive your 1,345-kg car at a constant speed of 23 mph a distance of 71 m down a ramp that has a grade of 14 %. Define positive direction in the forward direction
(a) Calculate the index of refraction of the polymer if the refracted angle is 26 degrees. (b) Calculate the critical angle of the polymer in air. (c) Calculate the speed of light in the polymer.
A 0.69 cm high object generates an image that is 0.8 cm high. The lens has a focal length of 7 cm, Find the image and object distances
Conversations with astronauts on the lunar surface were characterized by a kind of echo in which the earthbound person's voice was so loud in the astronaut's space helmet, Calculate the distance from Earth to the Moon
Two spectators at a soccer game in Montjuic Stadium see, and a moment later hear, the ball being kicked on the playing field. How far is each spectator from the player
A 59.0 kg skateboarder wants to just make it to the upper edge of a "quarter pipe," a track that is one-quarter of the circle with a radius of 3.80 m.
The sound level measured 5.2 m away from a jet engine is 140 dB. What is the intensity of the sound at 5.2 m? What is the power transmitted by the sound waves? At what distance is the sound level exactly half?
Calculate the flux of F through a sphere of radius a, centered at the origin and the flux of F through a planar disk of radius a, parallel to the xy plane and centered at the z axis at z=H
If electrons are accelerated from rest in an electron gun by sending them through a potential difference of 11.0 kV
The equation of a transverse wave on a string is y = (6.1 mm) sin[(30 m-1)x + (300 s-1)t] The tension in the string is 42 N. Find the linear density of this string
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