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Suppose in the drawing that I1 = I2 = 13.6 A and that the separation between the wires is 0.0244 m. By applying an external magnetic field (created by a source other than the wires) it is possible to cancel the mutual repulsion of the wires. This external field must point along the vertical direction. What is the magnitude of the external field?
You are pushing a 150-kg wooden crate in a straight line a distance of 4.5 m across a wooden floor. What is the work done by friction on the crate
At one instant a bicyclist is 40m due east of a park's flagpole, going due south with a speed of 10m/s. Then 30.0s later, the cyclist is 40m due north of the flagpole.
A clarinetist, setting out for a performance, grabs his 3.37-kg clarinet case (including the clarinet) from the top of the piano, Find the case's vertical acceleration
A sample of helium behaves as an ideal gas as it is heated at constant pressure from 273 K to 373 K. what is the mass of helium present
A guitar string is 90.0 cm long and has a mass of 3.23g. find the frequencies of the fundamental and first two overtones
Conservation of Energy A 100kg skier at the top of a 2km high mountain tucks the whole thing but only gets a final speed of 50m/s
A bicyclist is finishing his repair of a flat tire when a friend rides by with a constant speed of 3.6 m/s. Two seconds later the bicyclist hops on his bike and accelerates at 2.2 m/s2 until he catches his friend.
A 45.2-kg girl is standing on a 143-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, What is the girls velocity relative to the ice surface
The intensity of a cylindrical laser beam is 0.800 {rm W}/ {rm m} ^ {2}. The cross-sectional area of the beam is 3.0 times 10^ {- 4} {rm m} ^ {2} and the intensity is uniform across the cross section of the beam.
During a Carnot cycle, in the first process, an ideal gas is expanded isothermally at 500 K. 1,000 J of heat enters the system, What is the magnitude of Q that leaves the system
The ball rebounds straight upward to a height of 0.700 m. Illustrate what are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?
Drag race tires in contact with an asphalt surface have an extremely high coefficient of static friction. Assuming a constant acceleration and no slipping of tires, estimation the coefficient of static friction needed for a drag racer to cover 1.0 km..
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