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An incandescent lightbulb has a tungsten filament that is heated to a temperature of 4.00 x103 K when an electric current passes through it. If the surface area of the filament is approximately 1.00 x 10-4 m2 and it has an emissivity of 0.42, what is the power radiated by the bulb?
How to find the position and height of an image
A rope pulls a 100-kg skier up a frictionless slope inclined at300 to the horizontal. What is the work done by tension
A way to produce a fairly uniform magnetic field over a large accessible region is with a pair of identical circular loops of wire those shares the same axis and are physically parallel to each other, but whose centers are a certain distance apart.
An ambulance moving at 40 m/s sounds its siren whose frequency is 440 Hz. What frequency does a person in the car hear
The length of a string of a pendulum is increased by a factor of9. By what factor has the period of the oscillation changed
A spaceship of proper length 310 m takes 0.79 µs to pass an Earth observer. Determine the speed of this spaceship as measured by the Earth observer
Zach, whose mass is 64kg , is in an elevator descending at 10m/s. What is Zach's apparent weight while the elevator is braking
Bob has just finished climbing a sheer cliff above a beach, and wants to figure out how high he climbed. How high up is Bob
1 a student throws a ball vertically upward such that it travels 6.9 m to its maximum heightif the ball is caught at
A gamma ray photon produces an electron-positron pair each with a kinetic energy of 210 KeV. What was the energy and wavelength of the photon
A uniform magnetic field is decreasing at a rate of 0.23T/s. What is the magnitude of the induced electric field at a distance of 3.0 cm from the center of the magnetic field
A standing wave interference pattern is set up by radio waves among two metal sheets 6.20 m apart. This is the shortest distance among the plates that will produce a standing wave pattern. What is the fundamental frequency?
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