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Monochromatic light with a wavelength of 362 nm passes through a single slit and falls on a screen 82 cm away. If the distance of the ?rst-order dark band is 0.49 cm from the center of the pattern, what is the width of the slit? Answer in units of cm
A horizontal block-spring system with the block on a frictionless surface has total mechanical energy E = 55.1 J, What is the kinetic energy of the system at the equilibrium point
A ballon contains 2 lbs of Helium at 70 degrees F, if the pressure of the ballon is 65 psia, what is the volume of the ballon in cubic feet
A boy is attempting to swim directly across a river; he is able to swim at a speed of 0.421 m/s relative to the water. The river is 2.48 m wide and the boy ends up at 4.77 m downstream from his starting point.
A 25 kg cannon shell is subjected to a constant acceleration of 1200 g while in the cannon barrel. What force is the burning propellant exerting on the shell?
What is the separation distance between speaker and listener
A 27.0 g copper ring at 0°C has an inner diameter of D = 3.04591 cm. A hollow aluminum sphere at 87.0°C has a diameter of d = 3.05180 cm. What is the mass of the sphere
Using a ball that has unknown mass m. You plot your data in the form of f2 versus M/L, with f in rev/s,M in kg, and L in m. calculate the mass m of the ball
What is the size of the frictional force acting on the car
A 300-g block is dropped onto a vertical spring with spring constant k =180.0 N/m. find the speed of the block just before it hits the spring
question1a person doing a chin-up weighs 725 n disregarding the weight of the arms. throughout the first 20.0 cm of the
A large electromagnet has a 23 T magnetic field between its poles. What is the magnetic energy density between the poles
A monatomic ideal gas at high temperature T in a discharge tube has a triply degenerate excited state at an energy e above the ground state, Find the ratio population of the excited state to that of the ground state
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