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A cylinder with a diameter of 9 microns and a height of 40 microns is composed of Al2O3. Calculate the number of aluminum atoms and the number of oxygen atoms. Given: density is 3.97 Mg/m^3.
A ball of mass 5.8 kg and radius 13 cm rolls without slipping horizontally at 5.6 m/s and hits a spring attached to a wall. What is the maximum change in length of the spring
Two trains, each having a speed of 28 km/h, are headed at each other on the similar straight track. A bird that can fly 56 km/h flies off the front of one train, when they are 66 km apart and heads directly for the other train. On reaching the other ..
A proton of mass mp and charge qp =e, deuteron of mass 2mp and charge qd =e, Find the velocities and derive the radii of the paths for deuteron and alpha particle in term of the mass and charge of proton
A soccer player 'heads' the size 5 ball deflecting it by 46.0°, and keeps its speed of 15.90 m/s constant. A size 5 ball has a mass of approximately 0.421 kg. What is the magnitude of the impulse which the player must impart to the ball.
An electron remains in an excited state of an atom for typically 10-8 s. What is the minimum uncertainty in the energy of the state
Venus has a mass of 4.86x10^24 kg and a radius of 6.05x10^6 m. What is the acceleration due to gravity on Venus
If the bar has mass of 200g, a length of 15 cm, and th magnetic field has a magnitude of 0.2T, what must be the minimum current(direction and magnitude) to lift the bar
A toroid having a 7.2 cm square cross section and inside radius of 22.8 cm has 170 turns of wire and carries a current of 1.8 A. What is the magnetic flux through the cross section
In attempting to pass the puck to a teammate, a hockey player gives it an initial speed of 2.47 m/s. However, this speed is inadequate to compensate for the kinetic friction between the puck and the ice.
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
Two metal spheres, each of mass 20 g and initially at rest, are dropped from a height of 10 m in an evacuated chamber. Find the difference in final speeds of the two spheres
a cylindrical tube oriented vertically on earths surface closed at the bottom and open at the top height 100 m cross
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