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The small black strip on the battery is the positive (+) side of the battery. The long grey side is the negative (-) end. What end of the battery do the blue electrons "move out" from?
An aluminum rod of length l has a resistance of .8 ohms. Half of the rod is machined down so that half of the rod now has half of the radius of the original radius. What will be the new resistance
To drive to Chicago, a distance of about 150 km in 2 hours, you must average a speed of 75 km/hr. How fast must you drive to keep an average speed of 75 km/hr
A rocket of mass 10,000 kg undergoes an acceleration of 2 m/s2. a) Find the force supplied by the rocket's engines. b) Find the rocket's speed two seconds after it leaves the ground.
Consider a black body of surface area 28.0 cm2 and temperature 5600 K. How much power does it radiate
A wooden raft has a mass of 67 kg. When empty it floats in water (density 1000 kg/m3) with 51 percent of its volume submerged. What mass of sand can be put on the raft without it sinking.
A speck of dirt is embedded 3.00cm below the surface of a sheet of ice having a refractive index of 1.309. What is the apparent depth of the speck
A 10 cm long solenoid with 222 turns and radius R = 3.00 cm has a current flowing through it of Io = 200 mA. What is the magnetic field strength inside the solenoid
A bullet of mass 8.80 x 10-3 kilogram, moving at 1250 m/s impacts a tree stump and penetrates 4.00 centimeter into the wood before coming to rest. If the similar force acted on the bullet and it had the equal impact speed but half the mass, calcul..
1. gaseous helium is to be used to quench a hot piece of metal. the helium is in storage in an insulated tank with
The new earth-Pluto SuperShuttle line boasts that it can take you between the two planets (which are about 5.0 h apart in time) in 2.5 h, what is the shuttle's cruising speed
A solenoid 1.30m long and 2.60cm in diameter carries a currentof 18.0A. the magnetic field inside the solenoid is 23.0mT. Find the length of the wire forming the solenoid
As a result the needle becomes polarized, with +7.3 nC on the end that is close to the sphere, and -7.3 nC on the end that is far. What is the magnitude of the total force acting on the needle?
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