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The electric motor of a model train accelerates the train from rest to 0.665 m/s in 25.0 milliseconds. The total mass of the train is 875 gram. Determine the average power delivered to the train during the acceleration.
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Cell phone sends 1.25ghz magnetic waves. Field vector of the wave has a strength of 24 mv/m and points upward, Which direction does magnetic vector point
The speed of a bobsled is increasing, because it has an acceleration of 3.28 m/s2. Find the magnitude of the net force that acts on the bobsled
A person exerts a force of 48 N on the endof a door 86 cm wide. What is the magnitude of the torque if the force is exerted perpendicular to the door?
A 0.7 kW heater is designed to operate at 210 V. Assume that its resistance is constant. What is the power dissipated in this resistor if it operates at 120 V
A flask of volume 2.0 liters, provided with a stopcock, containsoxygen at 20 degree celcius, 1.0 ATM. how many grams of oxygen remain in the flask
Two window washers, Bob and Joe, are on a 3.00 m long, 405 N scaffold supported by two cables attached to its ends. what are the forces on each cable
a box of mass 1.0 kg sits atop a frictionless surface inclined at 30 degree above the horizontal.nbsp it is connected
Ash "the working bee" decides to gather pollen and in her quest flies 50 meters from a beginning point at 0° along the west and finds nothing. Determine the displacement and direction of the bee
A sphere of radius a has total charge Q. The volume charge density (in C/m^3) within the sphere is ρ(r) =C/r^2, where C is a constant equal to Q/(4πa).Discover expressions for the electric field both inside and outside the sphere as a function of the..
A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 1.64 hours. What is density of the planet? Suppose that the planet has a uniform density.
you have a mechanism by which you can use a magnetic spectrograph to chose the energy of the beta rays from a 137cs
A light, flexible cable is wrapped around a solid cylinder with mass 3.5 kg and radius 0.8 meters.
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