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A hydrogen atom is in a state with energy -0.850 .
In the Bohr model, what is the angular momentum of the electron in the atom, with respect to an axis at the nucleus?
A football is projected on a flat surface at a 32° angle. If the ball lands 45m from where it started, what is the football's initial velocity
A person sees a distant lightning strike, then 4.5 seconds later he hears the thunder clap. If it is 35 degrees Celsius, how far away was the lightning strike
Determine the escape velocity from the Sun for an object at the Sun's surface (r = 7.5 × 105 km, M = 2.0 × 1030 kg)
A 0.70 × 103 kg sports car collides into the rear end of a 2.2 × 103 kg SUV stopped at a red light. calculates the speed of the sports car at impact
A planet in another solar system orbits a star with a mass of 4.0×1030 kg. At one point in its orbit it is 250×106 km from the star and is moving at 35km/s.Take the universal gravitational constant to be 6.67 × 10−11 m2/s2 · kg andcalculate the se..
Electrons are ejected from a certain metallic surface with speeds ranging up to 4.2 105 m/s when light with a wavelength of ? = 615 nm is used. What is the work function of the metal?
A projectile is projected from the origin with a velocity of 30.0 m/s at an angle of 45.0 degrees above the horizontal
An iron bolt is used to connect two iron plates together. The bolt must withstand shear forces up to about 3150 N. Calculate the minimum diameter for the bolt
A person is trying to practice with their yo-yo. They can throw the yo-yo with initial angular velocity w(initial) = 500 rad/sec. How long does it take yo-yo to spin to rest
A diffraction grating has a line density of 580 . This grating produces a 1st order maximum at a distance of 2.52 from the central maximum on a screen which is 5.40 away
If the density (mass divided by volume) of the wall material is the same as that of pure water, what is the mass (in mg) of the cell wall, assuming the cell to be spherical and the wall to be a very thin spherical shell
A proposed ocean thermal-energy conversion (OTEC) system is a heat engine that would operate between warm water (17°C) at the ocean's surface, What is the maximum possible efficiency of the system
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