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You want a screen to be illuminated with an intensity of 440 mW/m2. The screen is 12.97 m away from the light source, which is a bare light bulb radiating light in all directions.
What is the power of the light source?
_________W
What is the rms value of the electric field at the screen?
_________V/m
Prepare a multiple-step income statement for the year ended December 31, 2012, concluding with earnings per share.
A shuffleboard disk is accelerated to the speed of 6.1 m/s and released. If the coefficient of kinetic friction between disk and the concrete court is 0.30, how far does the disk go before it comes to a stop? The courts are 14.5m long.
How fast should the car be traveling just as it leaves the cliff in order to just clear the river and land safely on the opposite side?
How much time is spent in pushing the mower
a block 20cm wide by 60 cm long balances (symetrically on a similar block which is fixed to the ground. What is the mass of the upper block
Calculate the velocity of the object for an elapsed time.
What is the angular frequency in rev/s of combination.
You're carrying a 3.2-m-long, 25 pole to construction site when you decide to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35 from its tip. How much force must you exert to keep the pole motionl..
Does current through a power supply increase when parallel bulbs are added? For example, if you have a circuit with one bulb and measure the current through the bulb to be 100 mA, what is the current through the power source when you add another b..
A pair of in-phase stereo speakers is placed side by side, 2m apart. You stand directly in front of one of the speakers, 5m from the speaker. What do you hear.
A parallel plate capacitor has plates that measure 13.5 cm long by 9.75 cm wide. The plates are separated by a distance of 2.75 mm, What is the capacitance in the capacitor
Two bars of identical mass are at 32 °C. One is made from glass and the other from another substance. The specific heat capacity of glass is 840 J/(kg · C°).
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