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A lightning bolt may carry a current of 1.00 x 104 Amp for a short time. Determine what is the resulting magnetic field 50 meter from the bolt? Assume that the bolt extends far above and below the point of observation.
µT
q1. a child goes down a playground slide with an acceleration of 1.20 ms2. compute the coefficient of kinetic friction
The work needed to remove an electron from the surface of sodium is 2.3 eV. How big maximal velocity will have electrons if the surface of sodium will be illuminated with ultraviolet light wave length
A copper rod 81 cm long is used to poke a fire. The hot end of therod is maintained at 105° C and the cool end has a constanttemperature of 24° C. What is the temperature in degrees Celsius of the rod 23 cm from the cool end?
A piece of ice of mass 0.0240 kg at an initial temperature of-11.0o C is placed in a well-insulated cup containing0.100 kg of water at 35.0o C. Calculate the equilibrium temperature of this system.
a bullet is moving at a speed of 367 ms when it embeds into a lump of moist clay. the bullet penetrates for a distance
A student sits on a rotating stool holding two 3.5 kg objects. When his arms are extended horizontally, Find the kinetic energy of the student before and after the objects are pulled in
Two conductors having net charges of +17.0 µC and -17.0 µC have a potential difference of 17.0 V between them. What is the potential difference between the two conductors
You stand at the center of a carousel spinning at rate w. You throw a ball horizontally with velocity Vo from a heigh h. what is the centrifugal force on the ball? what is the coriolis force on the ball?
A beam of protons moves in a circle of radius 0.34 m. The protons move perpendicular to a 0.29-T magnetic field. (a) What is the speed of each proton? (b) Determine the magnitude of the centripetal force that acts on each proton
nichrome wire of cross-sectional radius 0.769 mm is to be used in winding a heating coil. if the coil must carry a
As a baseball is being caught, its speed goes from 31 to 0 m/s in 0.005 seconds. The mass of the baseball is 0.145 kg. What is the force acting on the ball
Rivets can be cooled before they are put in place, thus when they reach equilibrium temperature they are more firmly fixed in place. If the volume expansion of iron is 35.0 X 10-6 K-1
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