Physics, 23.12.2019 21:31 faithcalhoun
Only a fraction of the electrical energy supplied to a tungsten light bulb is converted to visible light. the rest of the energy shows up as infrared radiation (i. e., heat). a 75-w light bulb converts 15.0% of the energy supplied to it into visible light. assuming a wavelength of 550 nm, how many photons are emitted by the light bulb per second? (recall 1 w = 1 j/s)
Answers: 2
Physics, 21.06.2019 21:30
One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?
Answers: 3
Physics, 21.06.2019 22:30
The integral design hub incorporates thento the bearing unit. n a. cv joint n b. mounting carrier n c. brake rotor n d tie rod end
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Physics, 22.06.2019 15:30
Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?
Answers: 2
Physics, 23.06.2019 00:30
Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero
Answers: 3
Only a fraction of the electrical energy supplied to a tungsten light bulb is converted to visible l...
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