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A metal surface is susceptible to a photoelectric threshold frequency of 8.529 x 1014 Hertz. Will the monochromatic UV light sources of wavelengths 283 nanometer, 342 nanometers, and 363 nanometers be able to eject photoelectrons from the metal, if so Obtain the speed of the fastest electron ejected?
A single pane window is 25mm thick. It measures 1.2 m by 2.5m One side of the window is 25 o C and theother side is -22 o C How much heat is lost through the window in 24 hours? Kglass = .84J/kgoC
Object A is metallic and electrically neutral. It is charged by induction so that it acquires a charge of -2.86E-6 C. Object B is identical to object A and is also electrically neutral.
Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Determine the period of the orbit
On a hot summer day, a young girl swings on a rope above the local swimming hole. how high above the water was she when she let go of the rope
A rectangular container measuring 10cmx20cmx25cm is filled with gas. What is the mass volume of water in kilograms.
Athletes sometimes do an exercise called "curling weights." Obtain the torque about the elbow caused by a 40-pound weight that makes an angle of 55o with respect to the body
100g of unknown material is heated to 80 o C, and then dropped into 50g of water at 20 o C in an insulated container. The water temperature rises within a few seconds to 38 o C. Discover the specific heat of the metal.
Calculate both absolute and relative pressure on the bottom of the tank if the meniscus (mercury surface) of the leg opening in the open air is a / 100 mm above the other b / 100 mm below the other.
On an essentially frictionless, horizontal ice rink, a skater moving at 4.1 m/s encounters a rough patch that reduces her speed by 49% due to a friction force that is 26% of her weight. find the length of this rough patch
A laser emits a narrow, circular beam of light. The radius of the beam is 1.37×10-3 m, and the power is 1.44×10-3 W
Human blood contains plasma, platelets, and blood cells. To separate the plasma from other components, centrifugation is used. Effective centrifugation requires subjecting blood to an acceleration of 2000g or more.
The time constant of a RC circuit is 5 sec. How long does it takefor the capacitor in this circuit to accumulate about 50% voltage of the total voltage? Assume the capacitor has zero volt at the beginning.
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