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a shopper pushes a grocery cart by exerting a force on the handle. if the force equal 76 N at an angle of 40.0 degrees below the horizontal, how much force is pushing the cart in the forward direction? What is the component of force pushing the cart against the floor?
A current of 0.307 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heartbeat and disrupting the flow of blood (and thus oxygen) to your brain. If that current persists for 2.90 min, how many conduction elec..
two plates of radius R are separated by a distance 2h.the top plate rotates with velocity w. find the velocity as a function of radius r and and height z
It takes 18 minutes to fill a 1.2 m3 horse trough. It is filled with water from a hose with diameter 2 cm. What is the flow rate of the water
A sample of the radioactive nuclide is prepared that has an initial activity of 7.28×1011 .92.4 after the sample is prepared, What is the half-life of this nuclide
A circuit contains a 150-? resistor, a 0.0530-H inductor, a 0.420-?F capacitor, and a source of time-varying emf connected in series. Determine the voltage drop across the inductor
A person pulls on a 50kg desk with a 200 N force acting at a 30 degree angle above the horizontal. The desk does not budge.
Three point charges have equal magnitudes, two being positive and one negative. These charges are fixed to the corners of an equilateral triangle, as the drawing shows. The magnitude of each of the charges is 7.1 µC, and the lengths of the sides o..
A typical power plant uses some fuel as the source of heat (QH) to drive a heat engine that does work (W) to drive a generator that is connected to the electrical grid. What is the efficiency and how do we express this in power
An extremely large nonconducting sheet creates equipotential surfaces, which are planes. What is the surface charge density on the sheet
A uniform diving board, 12m long and 20kg mass is placed on a platform. How far can a 60kg person walk down the board from the edge of the platform without board tipping over.
A copy of The History of the Decline and Fall of the Roman Empire by Edward Gibbon lies exactly in the middle of an otherwise empty 6.1m long bookshelf in Robarts Library. What is the speed at which the librarian raised the shelf
A converging lens with a focal length of 7.00cm forms an image of a 3.80mm -tall real object that is to the left of the lens. Where are the object and image located
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