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A human sprinter of mass 65kg starts a run at the maximum possible acceleration, pushing backward against a block set in the track. What is the force of his foot on the block?
A steel wire with mass21.8g and length1.6m is strung on a bass so that the distance from the nut to the bridge is 1.10 m. Calculate the tension required to obtain the proper frequency
A skier of mass 62.00 kg is pulled up a slope by a motor-driven cable. (a) Explain how much work is required to pull him 55.00 m up a 30° slope (assumed frictionless) at a constant speed of 3.40 m/s?
A piece of radium has an activity of 10 mCi. What is the mass of the radium
A grindstone with radius 0.65m starts from rest and rotates counter-clockwise through 3 rev at which point its angular speed is 25 rad/s
A concave shaving mirror has a radius of curvature of 40.1 cm. How far is the mirror from the man's face
A 47 microfarad capacitor is connected to a 9 volt battery. How many electrons is this charge equivalent to
A highway curve with radius 1000{\rm ft} is to be banked so that a car traveling 48.0{\rm mph} will not skid sideways even in the absence of friction
q1. a 62.6-kg chandelier is suspended 1.5 m below a ceiling by three wires each of which has the same tension and the
A 250 gram sample of a metal is warmed from 60 degrees celcius to 85 degrees celcius when 1000 cal are added. What is the specific heat constant of the metal.
What is the relationship between electric potential and electric field, If we know the electric potential everywhere in a region
A 2.00 kg steel ball strikes a massive wall at 15.0 m/s at an angle of 60.0 degrees with the plane of the wall. compute the average force exerted by the wall on the ball
The masses of astronauts are monitored during long stays in orbit, such as when visiting a space station. What is the mass of an astronaut who has an oscillation period of 2.00 s when in the chair
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