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A spring has a force constant of 20,000 N/m. Compute how far must it be stretched for its potential energy to be 36 Joule?
Answer in units of meter.
On an airplane's takeoff, the combined action of the air around the engines and wings of an airplane exerts a 7960-N force on the plane, What is the weight of the plane
A string 1.3 m long with a mass of 3.9 g is stretched between two fixed points with a tension of 93 N. Find the frequency of the fundamental on this string
Consider a system of 2 particles , each of which can stay in 0,ε,3ε.Let temp =T=(kB)^-1.
A 1500 microfarad capacitor and a 5600 microfarad capacitor are connected in parallel across a 12.0 V potential difference. Determine the total energy stored in the capacitors
A swimmer heads directly across a river, swimming at 1.60 m/s relative to the water. She arrives at a point 58.0 m downstream from the point directly across river, 63 m wide. What is the speed of the river current.
A car moves in a flat, circular path of radius R on a surface with a coefficient of kinetic friction of 0.25 and a coefficient of static friction of 0.35. How long does it take the car to complete one orbit
A 4.0 m long horizontal boom (of negligible weight) can pivot at the wall to which it is attached and it is supported by a cable hooked 0.6 m from the far end that is at an angle of 37.2 degrees to the boom. find the normal force of the wall pushin..
The current in a 100 watt lightbulb is 0.770A . The filament inside the bulb is 0.300mm in diameter. What is the electron current in the filament
Electrons are ejected from a certain metallic surface with speeds ranging up to 4.2 105 m/s when light with a wavelength of ? = 615 nm is used. What is the work function of the metal?
A frictionless pulley system at equilibrium has a m1 of 6 kg, mass 2 9kg and mass 3 6kg. Find the angle of theta
A generator uses a coil that has 490 turns and a 0.75 T magnetic field. The frequency of this generator is 60.0 Hertz, find the length of the wire from which the coil is made
At a certain time a particle had a speed of 84 m/s in the positive x direction, What was the average acceleration of the particle during this 2.7 s intervl
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