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Calculate the energy density of the magnetic field at a distance of 4.0 mm from a wire with a current 2.9 Amps. (in J/m^3)
A mass-spring system oscillates with an amplitude of 5.40 cm. If the spring constant is 239 N/m and the mass is 474 g, Determine the maximum acceleration of the object
when the chassis of a car is moved into a painting chamber a mist of paint is sprayed around the chassis. when the car
In the dangerous "sport" of bungee-jumping, a daring student jumps from a hot-air balloon with a specially designed elastic cord attached to his waist, Calculate the required force constant of the cord
Will a toroidally-wound, circular tubing continuously propel a magnet around the tube when a current is applied to the wiring?
a 0.50-kg mass hangs from a spring attached to the top of an elevator. the spring constant of the spring is 19.6 N/m. what is the period of the spring motion
A ball of mass 160 g is released from rest at a height of2.10 m above the floor and it rebounds straight up to a height of 0.900 m. Decide the magnitude of the ball's change in momentum due to its contact with the floor. If the contact time by the fl..
Here is one way in which nature regulates the size of animal populations: high population density attracts predators, who remove a higher proportion of the population than when the density of the prey is low.
A loudspeaker of mass 19.0 kg is suspended a distance of h = 2.00m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l= 3.50m. Illustrate what is the tension T in each of the cables?
An object is placed 25 cm in front of a lens of focal length 20 cm. 60 cm past the first lens is a second lens of focal length 25 cm. How far past the 25 cm lens does the final image form?
a boat is traveling upstream at 19 kmh with respect to the water of a river. the water is flowing at 7.0 kmh with
A 42kg child decides to make a raft out of empty 1.0 L soda bottles and duct tape. what is the minimum number of bottles needed in order to keep the child dry
A -kg box is being lifted by means of a light rope that is threaded through a single, light, frictionless pulley that is attached to the ceiling, what average power is delivered by the person pulling on the rope
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