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A certain lightbulb has a tungsten filament with a resistance of 19.1 ? when at 20.0°C and 142 ? when hot. Assume the resistivity of tungsten varies linearly with temperature even over the large temperature range involved here. Find the temperature of the hot filament.
Kim says that she was less than 10 ft away from the president when she took a picture of him with her 53-mm focal length camera lens. How close was Kim to the president when she took the picture
Using Newtons law of gravitational force Find the magnitude of the gravitational exerted by one mass on the other
The secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter. The turns ratio of the transformer is 45:1. Find the power consumed by the air filter
If a 68.3 kg person were travelling at 0.960c (where c is the speed of light), what would be the ratio of the person's actual kinetic energy to the person's classical kinetic energy
450 nm of light falls on a single slit of width 0.30 mm. What is the angular width of the central diffraction peak
The average lifetime of a pi meson in its own frame of reference (i.e., the proper lifetime) is 2.6 10-8 s. What is the average distance it travels before decaying
A steel beam that is 5 m long weighs 320N. It rests on two supports, 3.00 m apart, with same amounts of the beam extending from each end. Suki, who weighs 525N, stands on the beam in the center and then walks toward one end. How close to the end c..
Ceres, the smallest identified dwarf planet in the Solar System, has a radius R = 480 km, Use these numbers to calculate the escape speed from the surface of Ceres
Light of a certain frequency has a wavelength of 442 nm in water. The index of refraction of water for this light is 1.333. What is the wavelength of this light in benzene
A standard violin string is 32.8 cm long from the tuning peg to the bridge. When played open(without pressing a finger against the fingerboard), What is the speed of the wave on the string
When the temperature of a coin is raised by 71.8 C°, the coin's diameter increases by 2.11 x 10-5 m. find the coefficient of linear expansion
A modern sculpture has a large horizontal spring, with a spring constant of 276 N/m, that is attached to a 49.0-kg piece of uniform metal at its end, By how much has the spring stretched in meters
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