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A space station in the form of a large wheel, 311m in diamter, rotates to provide an "artificial gravity" of 5.2m/s^2 for people located on the outer rim. Find the rotational frequency of the wheel that will produce this effect. Answer in rpm.
An electron orbiting a hydrogen atom has an initial energy of -0.544 eV. The atom emits a photon, then absorbs a photon, What was the wavelength of the emitted photon
Suppose that a particle accelerator is used to move two beams of particles in opposite directions. what is the magnitude of the average current in this region
The drill pipe has an outer diameter of 75 mm, a wall thickness of 6 mm, and a weight of 0.8 kN/m. If it is subjected to a torque and axial load as shown, determine the principal stresses and maximum in-plane shear stress
In an action movie, the heroine is supposed to jump with a motorcycle from the roof of one skyscraper to another one. what minimum initial speed would she need to make the jump
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 , length 84.4, Calculate the weight of the rod
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +3q. Sphere B carries a charge of -q. Sphere C carries no net charge.
A cube of ice is taken from the freezer at -8.50C and placed in a 95-g aluminum calorimeter filled with 310 g of water at room temperature of 200C. Find the mass of the ice cube
A vertical straight wire carrying an upward 11 A current exerts an attractive force per unit length of 8.8 multiplied by 10-4 N/m on a second parallel wire 8.0 cm away
An electromagnetic wave in a vacuum has a magnetic field with a magnitude of 1.27 × 10-6 T. What is the intensity S of the wave
A sphere of radius R has a charge Q. The electric field strength at a distance r > R is Ei. What is the ratio Ef/Ei of the final to first electric field strength if Q is halved.
A horizontal 799-N merry-go-round is a solid disk of radius 1.45 m, started from rest by a constant horizontal force of 49.9 N applied tangentially to the edge of the disk
A heat pump extracts 7.0*10^6 J heat per hour from a well at 280K and delivers its output heat into a house at 320K. what minimum work must be supplied to the heat pump per hour
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