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1. All objects radiate energy, in much the same way as an ideal blackbody. So why is it difficult to see objects in a dark room? Explain.
2. Explain why the existence of a cutoff frequency in the photoelectric effect supports a particle model of light, rather than a wave model.
3. In a Compton scattering experiment, x-ray photons strike free electrons and are scattered in different directions as a result. Compare the energy, wavelength, and momentum of the scattered x-ray photons to those of the incident x-ray photons.
find the charge on the block. A very small charged block with a mass of 2.05g is placed on an insulated, frictionless plane inclined at an angle of 17° with respect to the horizontal.
A device for training astronauts and jet fighter pilots is designed to rotate a trainee in a horizontal circle of radius 12.0. how fast is she rotating
When a potential difference of 160 V is applied to the plates of a parallel-plate capacitor, What is the spacing between the plates
A 48.9 g ball of copper has a net charge of 3.0 µC. What fraction of the copper's electrons have been removed
An elevator and its load have a combined mass of 1600 kg. Find the tension in the supporting cable when the elevator, originally moving downward at 11 m/s
The outer one has a length of 46.0 cm and contains 6700 coils, while the coaxial inner solenoid is 4.0 cm long and 0.150 cm in diameter and contains 24 coils. Find the emf induced in the inner solenoid
What's your normal body temperature? It may not be 98.6°F, the oft-quoted average that was determined in the nineteenth century. What is the difference between these averages
an airplane undergoes the following displacements first it flies 87 km in a direction 40 east of north. next it flies
A ball is dropped from rest from the top of a building ofheight 10m. At the same instant, a second ball is projectedvertically upward from ground level, such that it has zero speed when it reaches the top of the building.
An iron ball hangs from a 21.5-m steel cable and is used in the demolition of a building at a location where the acceleration due to gravity is 9.78 m/s2. find the maximum speed of the ball during its swing
Two charged bodies exert an electrostatic force of 144 N on each other. If the distance between them is quadrupled and magnitude of one charge is cut in half, what is the new force between them.
a parallel-plate capacitor in air has a plate separation ofnbsp1.43nbspcm and a plate area of 25.0 cm2. the plates are
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