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It takes 1.4×106J of heat to bring a quantity of water from 14 ? C to a boil.
What is the mass of the Water?
a ball is thrown upward from the roof of a building, passes the roof going down three seconds later, how fast did the ball strike the ground
A runner covers one lap of a circular track 40.0m in diameter in 63.5s a) average speed for that lap? b) average velocity for that lap? c) If she covered the first half-lap in 28.6s , what was her average speed for that half-lap?
In a skating stunt known as crack-the-whip, a number of skaters hold hands and form a straight line. obtain the magnitude of the centripetal force
Two friends are carrying a crate of mass 200 kg up a flight of stairs. The crate has length 1.25 m and height 0.500 m, What is the magnitude of the upper person's force
A ballerina spins initially at 1.06 revs/second when her arms are extended. She then draws in her arms to the body, find the work involved in increasing her angular speed
You have determine that it takes 3s for a toy car ti travel through the distance of 162 cm. Calculate the average speed of the toy car
A 25-g string is streched with a tension of 43.0 N between two fixed points 12.0 m apart. What is the frequency of the second harmonic
Calculate the number of electrons in a steel (iron) pinhead. The pinhead may be assumed to be spherical with diameter 2 mm
A 1.00-kg glider attached to a spring with a force constant 25.0 N/m oscillates on a frictionless, horizontal air track. Find the period of the glider's motion
A newly discovered planet has a mean radius of 1350 km. A vehicle on the planet\'s surface is moving in the same direction as the planet\'s rotation, what is the period of the planet\'s rotation
Determine the power distribution in carrier and sidebands if the transmitted power is 1,000 W and mf = 1.
an object with a mass of 5g hangs from a cord around a pulley.? the length of the cord between point p and the pulley
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