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When an incandescent light bulb is turned on, the tungsten filament becomes white hot. The temperature coefficient of resistivity fortungsten is a positive number. What happens to the power deliveredto the bulb as the filament heats up? Does the power increase,remain the same, or decrease? Justify your answer. Does the resistance of a copper wire increase or decrease when both the length and the diameter of the wire are doubled? Justify your answer.
A straight horizontal garden hose 37.0 m long with an interior diameter of 2.10 cm is used to deliver 20oC water at the rate of 0.430 liters/s.
a doorframe is twice as tall as it is wide. there is a positive charge on the top left corner and an equal but negative
A 5.00?F capacitor that is initially uncharged is connected in series with a 5.50k? resistor and an emf source with E= 145V negligible internal resistance, Just after the circuit is completed, what is the voltage drop across the capacitor
a car can decelerate at -4.80 ms2 without skidding when coming to rest on a level road. what would be the magnitude of
a 1.6 kg block is released from rest and allowed to slide down a frictionless surface and into a spring. the far end of
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 8.77 m, what is the magnitude of the astronaut's linear speed
a thin metallic spherical shell of radius 42.1 cm has a total charge of 9.05 oc uniformly distributed on it. at the
An unstable particle produced in a high-energy collision is measured to have an energy of 483 MeV and an uncertainty in energy of 84 keV. Use the Heisenberg uncertainty principle to estimate the lifetime of this particle.
Not sure how to relate 'bandwidth' to wc+wm and wc-wm (w =omega = angular frequency) ie upper and lower sideband. We know audio range max is 20 kHz, how do we get band width from this data
In an experiment designed to measure the speed of light, a laser isaimed at a mirror that is 59.0 km due north. A detector is placed122 m due east of the laser. The mirror is to be aligned so thatlight from the laser refelects into the detector.
question light of wavelength 631 passes through a diffraction grating having 485. what is the angle of the bright spot
An artificial lens is implanted in a person's eye to replace a diseased lens. The distance between the artificial lens and the retina is 2.82 cm. What is the power of the implanted lens
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