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A beam of electrons is incident on a barrier 5eV high and 1nm wide. Discover what energy the electron should have at .1% of them to get during the barrier.
A 10.0 kgblock is dragged over a rough, horizontal surface by a 84.0 N force acting at 20.0° above thehorizontal. The block is displaced 6.00 m, Find the work done on the block by the normal force
A 50.0 g ball of copper has a net charge of 1.7 µC. What fraction of the copper's electrons have been removed
a 100.0 m long rod with a diameter of 3.0 mm has a charge of 1028 c. what is the approximate electric field 4 mm from
An object of mass m=2.5kg is moving along a straightroad in a direction pointing 18o north of east. A forcewhose magnitude is 47.0N, pointing 55o to the West ofSouth acts on the object. What is the magnitude of the parallel andvertical components of ..
A pilot flying a constant 215 km/h horizontally in a low-flying helicopter, At what angle (to the horizontal) should the car be in his sights
a 46 v battery is connected in series with a resistance of 5.7 o and an inductance of 3.2 h. find the energy stored
In a parallel circuit I=10.0A. There are 4 resistors. R1=13ohms R2=7ohms R3=15ohms R4=21ohms. What is the voltage drop across each resistance
What is the total power of Sunlight that is absorbed by the disk? The disk reradiates this power back to outer space as infrared light
A certain concrete will support a maximum compressive stress of 1.28 107 N/m2 before being crushed. A column of uniform width is to be made with this concrete. How tall can the column be if the stress in it at any point is not to exceed one half t..
A large cruise ship of mass 6.80 107 kg has a speed of 12.8 m/s at some instant. what is the ship's kinetic energy at this time
A college student is working on her physics homework in her dorm room. Her room contains a total of gas molecules. As she works, her body is converting chemical energy into thermal energy at a rate of 125 . If her dorm room were an isolated system (d..
swatville sluggers is a small manufacturer of baseball bats made from highquality 3-by-3-inch blocks of wood. once the
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