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A certain laboratory experiment requires an aluminum wire of length of 36.0 m and a resistance of 2.80 ? at 20.0°C. What diameter wire must be used? (The resistivity of aluminum at 20.0°C is 2.82 10-8 ? · m.)
An isotope of the element Thallium, Tl-206, undergoes beta decay with a half life of 3.1 minutes. what mass of the isotope will be left after 9.3 minutes have elapsed
A 500-kg elevator is pulled upward with a constant force of 5500 N for a distance of 50.0 m. What is the net work done on the elevator
A uniform 210N ladder rests against a perfectly smooth wall, making a 40.0 degrees angle with the wall. Find the normal forces that the wall exert on the ladder
A 30 k? resistor has a current of 63 mA passing through it. Determine the voltage drop across the resistor
what is the ball's speed immediately after the collision?
A playground merry go round of a diameter 6m and mass 240 kg is rotating at 12 rev/min about a frctionless vertical axle. Facing the axle, a 30kg child hops on to the merry go round and manages to sit down on its ledge. What is the new angular spe..
The electric potential at a position located a distance of 18.0 mm from a positive point charge of 7.60×10-9C, Calculate the value of the second charge
Consider a beam of electrons passing through a region with crossed electric and magnetic fields. What is the speed (in m/s) of the electrons
Gold has one conduction electron per atom. Its density is 19.3gr/cm3,molar mass is 197 gr/mole, determine The drift speed vd of the electrons in the wire
The masses of the particles are m1 = m3 = 5.0 kg and m2 = m4 = 8.0 kg. Find out the moment of inertia of the system about the z axis.
Two identical pellet guns are fired simultaneously from the edge of a cliff. These guns impart an initial speed of 24.1 m/s to each pellet. Gun A is fired straight upward, with the pellet going up and then falling back down, eventually hitting the..
A proton travels through uniform magnetic and electric fields. The magnetic field is in the negative x direction and has a magnitude of 2.77 mT. what is the magnitude of the net force acting on the proton
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