Thursday
December 12, 2013

# Posts by Alice

Total # Posts: 501

physics question
Why will dropping or heating a magnet weaken it?

physics
Pigeons have multiple-domain magnetite magnets within their skulls that are connected through a large number of nerves to the pigeon's brain. How does this aid the pigeon in navigation? (Magnetic material also exists in the abdomens of bees.)

physics opinion
A common pickup for an electric guitar consists of a coil of wire around a permanent magnet. The permanent magnet induces magnetism in the nearby guitar string. When the string is plucked, it oscillates above the coil, thereby changing the magnetic field that passes through th...

physics
What is the primary difference between an electric motor and an electric generator?

physics
Calculate the cost of operating a 65 W light bulb continuously for a 30-day month when electrical energy costs \$0.23/kW·h. \$ 1 How do you calculate cost? whats the equation?

physics
A color television has a power rating of 325 W. How much current does this set draw from a potential difference of 120 V? 1 . A i got 2.42 but its wrong?

physics
How much charge passes through a cross-sectional area of a copper wire in 0.8 s if I = 3.5 A? 1 C -Work equation?

physics
A net charge of 47 mC passes through the cross-sectional area of a wire in 19.0 s. (a) What is the current in the wire? 1 A (b) How many electrons pass the cross-sectional area in 1.0 min? 2 electrons

physics
A hair dryer draws a current of 9.7 A. (a) How much charge passes through the hair dryer in 3.5 min? 1 C (b) How many electrons does this represent? 2 electrons

Math
A landscaper is choosing a compost bin. He wants it to hold exactly 12 cubic feet of compost. Using whole numbers only, how many different sizes can he choose from?

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