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A doubly charged ion with velocity 6.9 × 106 m/s moves in a path of radius30 cm in a magnetic field of 0.80 T in a mass spectrometer. What is the mass of this ion?
A robot probe drops a camera off the rim of a 239 meter high cliff on Mars, where the freefall acceleration is -3.7m/s^2. Determine the time required for it to hit the ground
A 3m-long, 300 steel beams extend horizontally from the point where it has been bolted to the framework of a new building under construction. A 73 construction worker stands at the far end of the beam. What is the magnitude of the torque about poi..
A glass window pane in a home is 0.62 cm thick and has dimensions of1.0 m 1.9 m. Find how much energy is lost during the window in one day, assuming the temperatures outside and inside remain fix
The resolution of the eye is ultimately limited by the pupil diameter. What is the smallest diameter spot the eye can produce on the retina
An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has amass of 5.7×104 kg, and the force causes itsspeed to change from 7400 to 5900 m/s. (a) What isthe work done by the..
Light from an argon laser strikes a diffraction grating that has 5390 grooves per centimeter. Determine the wavelength of the laser light
The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the positive direction. From what height did the student fall? assume that the only force acting during the collision is that due to the ground.
A dartboard with a mass of 2.2kg is suspended from the ceiling such that it is originally at rest. A 0.030kg dart is thrown at the dartboard with a velocity of 1.2m\s. After the dart hits the dartboard, the dart and the board initially move by a velo..
A college student produces about 127 kcal of heat per hour onthe average. What is the rate of energy production inwatts? How many kilocalories of heat does the operation of a 1195 Whair dryer produce each second?
A glass vial filled with mercury vapor (4.88 eV between ground state and first excited state), is placed between the cathode and anode of a photoelectric effect apparatus. Assume that the glass is so thin that it will not reduce the energy of phot..
Find out the altitude of the plane
The archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from the fish's mouth. How much time will the beetle have to react
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