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Using a wheel and axle machine, a force of 100 Newton applied to the rim of a wheel can lift a load of 80 kilogram. The diameters of the wheel and axle are 1 meter and 80 centimeter correspondingly. Obtain the actual mechanical advantage and the efficiency of the machine.
Water flowing through a hose at 4 m/s fills a 900L child's pool in 8 min, What is the diameter in cm of the hose
Four small charged bodies of equal charges Q=-1nC are placed at four vertices of a rectangle with sides a=4cm and b=2cm. Determine the direction and magnitude of the electric force
a river of width 34 m flows in a straight line the x direction with a speed of 0.24 ms. a boat is rowed such that it
What is the magnitude of the total linear acceleration of a piece of metal on the very outer edge of the flywheel 4.1 seconds after it started to rotate
A 2 meter wire carrying 1 A of current is at a 90 degree angle to a magnetic field. If the current feels a force of 1 N from the magnetic field, what is the strength of the field
two large parallel conducting plates each having an area of 2.00 m2 are 6.25 mm apart and have charges of equal
Two boxes, A and B, are connected by a (mass-less) cord and are resting on a smooth (frictionless) table. Find the tension force in the cord connecting the two boxes
A 0.590-kg slab of granite isheated so that its temperature increases by 7.10° C. what is the specific heat of granite
If, on other hand, she first kicks it to player 2, who then kicks it into the net, the ball undergoes two successive displacements, y and x. What are the magnitude and direction of x and y.
Light intensity of a 100 W bulb at a certain distance is 1 W/m2. The distance is doubled. What are the electric field amplitude and the magnetic field amplitude at that new distance
A comet with a mass of 7.75 1011 kg strikes Earth at a speed of 26 km/s. Find the kinetic energy of the comet in joules
You are designing a small coil (called a search coil) to measure magnetic fields. It is to have a diameter of 3.80 cm, How many turns should the coil have
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