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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.
An airplane maintains a speed of 567 km/h relative to the air it is flying through as it makes a trip to a city 745 km away to the north.
One object is at rest, and another is moving. The two collide in a one-dimensional, completely inelastic collision. when the small-mass object is the one moving initially
Suppose that water waves coming into a dock have a velocity of 1.7 m/s and a wavelength of 2.6 m. With what frequency do these waves meet the dock
A particle moves in the x - y plane under the constraint that its velocity vector is always directed towards a point on the x axis whose abscissa is some given function of time f(t). Show that for f(t) differentiable, but otherwise arbitrary, the con..
An athlete at a gymnasium holds a 3.0kg steel ball in his hand. His arm is 70cm long and has a mass of 4.0kg. Calculate the magnitude of the torque about his shoulder if he holds his arm
A fan is rotating at a rate of 740 rpm. When the motor is turned off, What is the angular acceleration of the blades as they slow down
An electrical heating coil is immersed in 4.0kg of water at 21 degrees C. What is the potential difference at which the coil operates
a the star zog has a mass of 1.57 e30 kg. calculate the angle by which light from a distant star is deflected at a
Two point charges are on the y-axis. A 5.0 µC charge is located at y = 1.05 cm, and a -2.42 µC charge is located at y = -1.30 cm. Find the total electric potential at the origin
A 38 ohm resistor is made from a coil of copper wire whose total mass is 11.2 g. Find out the length and diameter of the wire.
Calculate the net work done by the force of friction. A 1.50 m-long, 530 g rope pulls a 7.00 kg block of ice across a horizontal, frictionless surface. The block accelerates at 1.90 {rm m}/{rm s}^{2}. How much force pulls forward on (a) ice (b) rop..
A blackened, solid copper sphere that has a radius equal to 2.5 cm hangs in an evacuated enclosure whose walls have a temperature of 29°C. find the initial rate at which its temperature changes
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