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Nora jogs several times a week and always keeps a journal ofhow much time she runs. One day she forgets her stopwatch. As shepasses a particular bank, she remembers that it is 4.3km from herhouse. She knows from her previous training that she has aconsistent pace of 4.0 m/s. How long has Nora been jogging when shereaches the bank?
The vertical displacement due to a travelling wave moving horizontally is given by y(x,t) = 5.4cos(.4(rad/s) t (sec)) where x and y are in centimeters. The horizontal distance between the points whose phase differs by pi/3 is A. 1.05 cm B. 2.62 cm C...
A 40 turn coil of radius 5.4 cm rotates in a uniform magnetic field having a magnitude of 0.49 T. find the magnitude of the maximum torque exerted on the coil
A car slows down with an acceleration that has a magnitude of 3.5 m/s2, What was the car's initial velocity
A 150 MW laser pulse is focused with a lens to a diameter of 1.39 %u03BCm. What is the laser beam's electric field amplitude at the focal point
Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 410 N and F2 = 376 N. (Assume up and to the right as positive directions.), What is the resultant of these two forces
A car of mass 1200kg is heading east at 10m/s. A second car of mass 1500kg is heading west at 20.0m/s. They meet in an elastic collision. What was the initial kinetic energy of the system
Two particles of mass m1= 2.6 kg and mass m2 = 4.8 kg that are free to move on a horizontal track are initially held at rest so that they compress a spring, Find the final velocities of the two particles
A "75 Watt" light bulb uses an average power of 75 W when connected to an rms voltage of 120V. what is the maximum current in the light bulb
A container holds 1.4 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 8.2x10-3 kg bullet with a speed of 780 m/s
What is the speed of the runner. What is the total translational kinetic energy of gas molecules.
A simple pendulum has a mass of 0.650 kg and a length of 2.00 m. It is displaced through and angle of 7.0 degrees and then released. what is the maximum restoring force using harmonic
A crate of 45.2-kg tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it and observe that the crate just begins to move when your force exceeds 310N. find the coefficient of static friction between the crate and ..
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