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A spacecraft that is initially at rest turns its engine at t=0. Ifits mass is m=3000kg and the force from the engine is 45N, what is the acceleration of the spacecraft?
The "size" of the nucleus in Rutherford's model of the atom is about 1.00 fm = 1.00E-15 m. find the electrostatic potential energy of the pair of protons
A bullet of mass 7.00g is fired horizontally into a wooden block of mass 1.29kg resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.250. The bullet remains embedded in the block, which is observed to..
Two long parallel wires each carry a current of 5. A directed to the east. The two wires are separated by 8 cm. What is the magnitude of the magnetic field at a point that is 5.0 cm from each of the wires.
The rms speed of the molecules in 1.8 of hydrogen gas is 1600 m/s. What is total translational kinetic energy of the gas molecules.
A thick spherical shell of charge Q and uniform volume charge density ? is bounded by radii r1 and r2, where r2 > r1. With V = 0 at infinity, find the electric potential V as a function of the distance r from the center of the distribution, consideri..
question1an airplane flies 200 km due west from city a to city b and next 335 km in direction of 30.0deg north of west
Two wheels have the same mass and radius of 4.5 kg and 0.39 m, respectively. determine the net external torque that acts on each wheel
A concave shaving mirror has a radius of curvature of 40.1 cm. It is positioned so that the (upright) image of a man's face is 2.7 times the size of his face. How far is the mirror from the man's face?
A stone is dropped at t = 0. A second stone, with 6 times the mass of the first, is dropped from the same point at t = 56 ms. How fast is the center of mass of the two-stone system
A soprano saxophone is an open pipe. If all keys are closed, it is approximately 65 cm long. Using 343 m/s as the speed of sound, find the lowest frequency that can be played on the instrument.
a solid cylinder (M=2.07 kg, R=0.117 m) pivots on a thin, fixed, frictionless bearing. Calculate the angular acceleration of the cylinder
A uniform disk of mass 10 kg and radius 3.0 m can rotate without friction about its fixed center like a merry-go-round. What is the angular velocity of the two disks together about the center of the large disk after the small disk have moved
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