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Electrostatic interactions with neighbors cause atoms in solids to be held in place as if bound together by tiny springs. The excitation temperature for vibrations in many metals is around 200 K. If the mass of a metal atom is 2.0 Ã- 10âˆ'25 kg, what is a typical value for the force constant κ (Fspring= âˆ'κx) with which the atoms are bound in place? The answer is 137 N/m. How do you arrive at that conclusion?
A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. What is the average power generated by the lifting force
What is the total translational kinetic energy in a test chamber filled with nitrogen (N2) at 2.03×105 Pa and 20.7°C? The dimensions of the chamber are 3.00 m × 6.00 m × 8.30 m
A 30.0 capacitor initially charged to 30 is discharged by a 1.40 resistor. How long does it take to reduce the capacitor's charge to 2.00.
If light is shown from a sheet of glass toward water and just skims the boundary between the glass, at what angle was the light aimed toward the water
(a) Find the components of the net electric field at the origin. Ex = , Ey = (b) Find the magnitude and direction of the net electric field at the origin. |E| = at direction (from +x axis).
What is the maximum speed the masses
A current loop, carrying a current of 3.0 A, is in the shape of a right triangle with sides 30, 40, and 50 cm. Find the magnetic dipole moment of the loop
14 electrons are placed on a metal sphere. if the potential of the sphere is -38 V, what is the radius?
the index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), what is the angle of refraction for each wavelength
The distance between the electron and proton in a hydrogen atom is 5.3 x10-11 m. Find the speed of the electron as it orbits the proton
the final equilibrium temperature of the tin- water mixture.
Electronics and inhabitants of the International Space Station generate a significant amount of thermal energy that the station must get rid of. How much power is radiated from each panel
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