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An electron traveling due North with speed 4.0 x 10 m/s enters a region where the earth?s magnetic field has the magnitude 5.0 x 10^-5 T and is directed to the north and upward at 30 degree above horizontal. What magnitude force acts on the electron?
A 46-N lithograph is supported by two wires. One wire makes a 27° angle with the vertical and the other makes a 12° angle with the vertical. Find the tension in each wire
A projectile with mass .065 kg is fired at and embeds itself in a pendulum with mass .19 kg. What is the percent kinetic energy loss during the perfectly inelastic collision
An opening of area 0.264 cm2 in an otherwise closed beverage keg is 48.4 cm below the level of the liquid (of density1.05 g/cm3) in the keg. Find the speed of the liquid flowing through the opening
A steel rod with a length of l = 1.55 m and a cross section of A = 4.84 cm2 is held fixed at the end points of the rod. What is the size of the force developing inside the steel rod
A 67 kilogram crate is dragged across a floor by pulling on a rope attached to the crate and inclined 15 degree above the horizontal. find what is the magnitude of the initial acceleration of the crate
The motion of a piston in an auto engine is simple harmonic. If the piston travels back and forth over a distance of 10cm, calculate the maximum speed of the piston
According to Equation 20.7, an ac voltage V is given as a function of time t by V = V0sin(2?f t), what is the smallest value of the time at which the voltage equals two-thirds of the peak value
A wrecking ball swings at the end of a 11.4-m cable on a verticalcircular arc. The crane operator manages to give the ball a speedof 12.0 m/s as the ball passes through the lowest point of itsswing and then gives the ball no further assistance.
The combination of an applied force and a friction force produces a constant total torque of35.3N · m on a wheel rotating about a fixed axis. Find the magnitude of the torque due to friction
A ball is thrown in a horizontal direction from the roof of a building with an initial speed of 20 m/s. How high is the building
Aluminum has a density of 2.70 g/cm3. We would like to make aluminum foil that is 96 micrometers thick and 35.8 centimeter in width. find how many meters long of an aluminum foil can we make
A cylinder 10 m high, with a cross-sectional area of 0.1 m2, has a mass-less piston at the bottom with water at 20 degrees Celsius on top of it. Find the total heat transfer to the air when all of the water has been pushed out
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