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Aircraft equipped with powerful radar units are forbidden from turning them on when on the ground near people. Explain why this is so.
find out the magnitude of the gravitational force exerted.
A copper rod has a length of 1.2 m and a cross-sectional area of4.0 x10-4 m2. One end of the rod is incontact with boiling water and the other with a mixture of ice andwater. What is the mass of ice per second that melts? Assume that no heat is lo..
The end milling cutter has two teeth and its diameter = 15.0mm. Find out the feed rate and time to complete the cut.
Two solenoids are part of the spark coil of an automobile. What is the mutual indictance M of the solenoids
A 1.83 kg book is placed on a flat desk. Suppose the coefficient of static friction between the book and the desk is 0.442 and the coefficient of kinetic friction is 0.240. How much force is needed to begin moving the book
A heat engine has an efficiency of 61.5% and it exhausts 7500 J of waste heat into the environment. How much work is performed by the previous heat engine
A solenoid is constructed with a total of 1500 turns wound around a length of 25 cm. A constant current of 1.7 A flows through the solenoid. Calculate the magnetic force on the proton
Sally thinks she has an easy win and so, during the remaining portion of the race, deaccelerates at a constant rate of 0.40 m/s2 to the finish line. What constant acceleration does Mar now need during the remaining portion of the race, if she wish..
in a ballistic pendulum an object of mass m 0.2kg is fired with an inital speed of v 700ms at a pendulum bob. the bob
An electric fan not only does not decrease the temperature of the air, but it really increases air temperature. How can you then explain that you are cooled by a fan on a hot day
A baseball player rounds second base in an arc with a radius ofcurvature of 4.88 m at a speed of 6.1 m/s If he weighs 845Newton's, what is the centripetal force that must be acting
In a pan on a stove 125 g of water at 100 degrees Celsius is converted to steam. What s the entropy change of water the is now steam
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