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A D-cell of the type utilized in flashlights can supply a half mole of electrons to an external circuit before all of its stored chemical energy has been dissipated. (One mole =6.02*1023 particle,) If this cell is connected to a small lamp of the kind used in our second lab experiment, the electron current in the bulb will be 2.40*1018 electrons per second. Compute the number of hours the bulb will remain lit.
a proton is released in a uniform electric field and it experiences an electric force of 8.65times10-14n toward the
A uniform steel beam has a mass of 490 kg. On it is resting half of an identical beam. What is the vertical support force at each end
An airplane is flying with a velocity of 260 m/s at an angle of 30.0° with thehorizontal, as the drawing shows. When the altitude of the plane is2.0 km, a flare is released from theplane. The flare hits the target on the ground. What is the angleθ?
a wire is 1.2 m long and has a mass of 0.027 kg. the wire is stretched between two points and when driven by an
Two point charges have a total charge magnitude of 576 µC. When placed 1.19 m apart, the force each exerts on the other is 20.2 N and is repulsive. What is the charge magnitude on each? Please include solution.
an automobile with a mass of 1000kg including passengers settles 1.0cm closer to thenbspground for every 100kg of
A tennis player swings her 1000g racket with a speed of 11m/s, If the tennis ball and racket are in contact for 12ms, find the average force that the racket exerts on the ball
An arrow, starting from rest, leaves the bow with a speed of 26.6 m/s. If the average force exerted on the arrow by the bow were tripled, with what speed would the arrow leave the bow
Calculate the gravitational force between the Sun and the Earth. Use the following numbers. G = 6.67 x 10-11 m3/kg/s2, Mass of the Sun (M_sun) = 2.0 x 1030 kg
A 0.39 V potential di?erence is maintained across a 1.7 m length of tungsten wire that has a cross-sectional area of 0.85 mm2, What is the current in the wire
A flowerpot is accidently knocked off the edge of a balcony 50 m above the ground. Find the velocity and acceleration of the flowerpot at t=2.0s
a convex mirror of radius of curvature 1.73 m is placed 0.237 m from a chess piece which is on the reflecting side of
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