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When 170 V is applied across a wire that is 7.7 m long and has a 0.25 mm radius, the magnitude of the current density is 1.4 x 104 A/m2. Find the resistivity of the wire.
Consider 1cm³ of liquid nitrogen contained within a 5cm³ sealed container. If the temperature of the container is raised to 293 K and all of the liquid nitrogen were to subsequently evaporate, what would the pressure be within the container?
A 12-kg box is free from the top of an incline that is 5.00m long and makes an angle of 40 degrees to the horizontal. A 60-N friction force impedes the motion of the box.
How much work has he done? (b) Another player, wearing clothes that offer better protection against heat loss, is able to remain in the game long enough to do 2.1 × 105 J of work. What is the magnitude of the heat that he has lost?
The ground state for a single valence electron of a rubidium atom (Z=37) is 5s and its energy is –4.18 eV. The valence electron is excited into the 5g state. We want to determine the energy of this 5g electron. Assume that the wave function for th..
Although the evidence is weak, there has been concern in recent years over possible health effects from the magnetic fields generated by transmission lines. Estimate the magnetic field strength on the ground
A boat moves relative to water with a velocity which is n =2 times less than the river flow velocity. At what angle to the stream direction should the boat move to minimize drifting.
When two sticks are laid end-to-end they cover a length of 8.32 feet. One stick is 2.90 ft longer than the other. What is the length of the shorter stick in feet.
A door with width L = 1.0 m and mass M = 15 kg is hinged on one side so that it can rotate freely. What is the angular velocity of the door with respect to the hinge just after the bullets embeds itself in the door
Eq: D(x,t) = 2.4sin(0.60x)cos(42t) where x and D are in cm and t is in sec. what is the distance between nodes
A student throws a baseball at a large gong 76 m away and hears the sound of the gong 1.95758 s later. What was the average speed of the base- ball on its way to the gong
A block of mass 445 g is attachedto one end of a cord of mass 3.10 g;the other end of the cord is attached to a fixed point. Through what angle does the block rotate
a battery has an internal resistance of 1.3 omega and a voltage of 48 v. what is the load resistance which causes the
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