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When white light is incident on asheet of transparent material, it is found that the emerging lightis red (i.e., wavelength longer than 644 nm). What is the work function of the material?
work function = eV
An object with a mass of 41.0 g is moving uniformly with a velocity of 37.0 m/s along the positive x-axis. What is the velocity of the first particle, in the zero momentum frame, after an elastic collision
A flywheel of mass 185 kg has an effective radius of 0.62 m (assume the mass is concentrated along a circumference located at the effective radius of the flywheel)
A small steel wire of diameter 1.0mm is connected to an oscillator and is under a tension of 5.7N. What is the power output of the oscillator, assuming that the wave is not reflected back
Air that initially occupies 0.80 m3 at a gauge pressure of 140 kPa is expanded isothermally to a pressure of 101.3 kPa, Compute the work done by the air
A cylinder contains 2.25 mol of helium gas at 21.0°C. Assume that the helium behaves like an ideal gas. What is the average kinetic energy per molecule
The potential difference between the plates of a capacitor is 137 V. Midway between the plates, a proton and an electron are released. find the initial speed of the proton
A 51kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 250N. For the first 10.5m the floor is frictionless, and for the next 10.5m the coefficient of friction is 0.18. What is the final speed of the crate af..
This procedure has actually been used to "weigh" astronauts in space. A 42.5-\rm kg chair is attached to a spring and allowed to oscillate. What is the mass of the person
at a junction in an a-c circuit a single current divides into two seperate currents I1=10,, I2=5, where I1 lags I2 by 30, use comlex numbers to represent currents.
Two blocks, m1=1.0kg and m2=2.0kg are connected by a light string over a pulley. what is the acceleration of the system
a 2.00 nC charge is placed on the x-axis at x= -3.00cm, another 2.00nC charge is placed on the x-axis at x=3.00cm, Calculate the electric potential at the origin
A proton traveling with a velocity of 6.20x10^6 m/s in the positive x direction encounters a uniform 0.25 magnetic field in the positive y direction
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