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A tungsten light bulb filament has a surface area of 2.6*10-5 m2 and is maintained at a temperature of2.5*103 oC. Calculate the rate of energyradiation from the filament. Assume an emissivity of 0.240 and takethe temperature of the surroundings to be 20.0o C.
A copper ball with a radius of 1.7cm is heated until its diameter has increased by 0.19mm a)Assuming an initial temperature of 22 degrees celsius, find the final temperature of the ball.
A 0.50 kg ball that is tied to the end of a 1.30 m light cord is revolved in a horizontal plane with the cord making a 30° angle, with the vertical. If the cord can withstand a maximum tension of 9.5 N, what is the highest speed at which ball can ..
What inductance must be connected to a 25 pF capacitor in the oscillator capable of generating 480 nm (i.e., visible) electromagnetic waves.
Suppose a string of length l under a certain tension has a fundamental frequency of 120 Hz. what is the new fundamental frequency
A radio tuner is built by connecting an L=0.48mH inductor and variable capacitor in series with an antenna. What is the quality factor of the circuit with the capacitance you found
Leigh is doing a knee extension exercise using a 100 N dumbbell strapped to her ankle 40 cm from her knee joint. For this position, what torque is created by the dumbbell about her knee joint axis
A new record for running the stairs of the Empire State Building was set on February 3, 2003. what was his average power output during the climb
A hunter wishes to cross a river that is 2.10 km wide and that flows with a speed of 4.4 km/h. The hunter uses a small powerboat that moves at the maximum speed of 12.60 km/h with respect to the water.
Light of wavelength 5.60 multiply.gif 102 nm passes through a slit of width 0.180 mm. Determine the width of the first-order bright fringe
light with a wavelength range of 145-295 nm shines on a silicon surface in a photoelectric effect apparatus, What is the longest wavelength of the light that will eject electrons from the silicon surface
You hold a small plane mirror 0.50 m in front of your eyes, Find the height of the bottom of the mirror such that the lowest point the person can see on the building is 22.9 m above the ground
A 200-turn rectangular coil having dimensions of 3.0 cm by 6.0 cm is placed in a uniform magnetic field of magnitude 0.98 T. Find the current in the coil if the maximum torque exerted on it by the magnetic field is 0.23 N · m.
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