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A man moves his head back and forth between the poles of a powerful magnet. He moves perpendicular to the field at a maximum speed of 150m/s. If he can taste on his tongue, an electric field of 10V/m, how powerful must the magnetic field be so that he may taste it?
A duck has a mass of 2.6 kg. As the duck paddles, a force of 0.11 N acts on it in a direction due east. In addition, the current of the water exerts the force of 0.12 N in a direction of 44° south of east. When these forces begin to act, the velocity..
A certain centrifuge produces a centripetal acceleration of magnitude exactly 1220g at a point 11.7 cm from the axis of rotation. Find the number of revolutions per second
Two balls of equal mass (0.70kg) approach the origin along the positive x- and y-axes at the same speed (3.6m/s). What is the magnitude of the total momentum of the system
Two identical small insulating balls are suspended by separate 0.23-m threads that are attached to a common point on the ceiling, Determine the charge on each ball
A heat engine operates in a Carnot cycle between 83.0°C and 353°C. It absorbs 21004 J of energy per cycle from the hot reservoir. What is the mechanical power output of this engine
A 8500-kg boxcar traveling at 13m/s strikes a second boxcar at rest. what is the mass of the second car
determine the scalar potential due to a 1m-long horizontal line of charge with 10mc total charge. use this result to
an electron with a kinetic energy of 10ev is moving from left to right along the x-axis. the potential energy is v0 for
A parachutist descending at a speed of 13.4 m/s loses a shoe at an altitude of 54.2 m. Illustrate what is the velocity of the shoe just before it hits the ground? The acceleration of gravity is 9.81 m/s2.
You use a concave mirror to focus the light from the sun to a small point. Is this point located at the focal point, further from the mirror than the focal point, or closer than the focal point? Explain
An ideal gas has a pressure of 2.0 atm and temperature 27 degrees celcius. what is the volume of this gas
A wedge of mass M and angle a slides freely on a horizontal plane. A particle of mass m moves freely on the wedge. Determine the motion of the particle as well as that of the wedge.
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