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The human eye is most sensitive to yellow-green light having a frequency of about 5.45 x 1014 Hz (a wavelength of about 550 nm). What is the energy in joules of the photons associated with this light?
charge moving perpendicularly to an electric. an electron has a kinetic energy equal to 2e-16 j moves horizontally into a uniform field. find the force of the electron between the plates and acceleration
A 12 DC power supply is connected to the primary coil of a transformer. What is the rms voltage across the secondary
A 815-kg car stopped at an intersection is rear-ended by a 1740-kg truck moving with a speed of 13.0 m/s. find the final speed of both vehicles after the collision
A 245 kg person lays on board that is supported only on the ends and that has a mass of 12.0 kg. what is the force on either side where the board is supported
An x-ray tube is operated at 48200 V. Calculate the minimum wavelength of the radiation emitted by this tube
Suppose an astronomical telescope is being designed to have an angular magnification of 31.6. If the focal length of the objective lens being used is 84.5 cm, Find the distance between the two lenses for a relaxed eye
A SLR digital camera often has pixels measuring 8.00m × 8.00m. How many such pixels does the height of this image cover
Two identical wires with a weight of 4.95E+4 N/m, are located one above the other, in a vertical plane above the surface of the earth. The wires are aligned north-south so that the earths's magnetic field will not affect them.
a person moves 25.0 m along 30 degrees north of east and then he moves 50.0 m due west. how far and in what direction
A long uniform wooden bar with square crosssection floats on water. Show that , if the relativedensity of wood is 0.50, the bar will float with all fourfaces making an angle of 45 degrees with the water surface.
You make a capacitor by cutting the 15.5 cm--diameter bottoms out of two aluminum pie plates, separating them by 3.40 mm, What's the capacitance of your capacitor
An object moves in a straight line with a constant acceleration. For a particular one-second interval, its average velocity is 2 m/s. What is the total displacement for the combined intervals
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