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(a) A hydrogen atom has its electron in the n = 2 level. The radius of the electron's orbit in the Bohr model is 0.212 nm. Find the de Broglie wavelength of the electron under these circumstances.
(b) What is the momentum, mv, of the electron in its orbit?
A sled, which has amass of m=125kg., is sitting on an icyhorizontal surface. find the magnitude of the normal force acting on the sled
An electric heater is rated at 1300 W, a toaster is rated at 1150W, and an electric grill is rated at 1530 W. The three appliancesare connected in parallel to a common 123 V circuit.
A cardinal (Richmondena cardinalis) of mass 3.60×10-2 kg and a baseball of mass 0.140 kg have the same kinetic energy. What is the ratio of cardinal's magnitude p_c of momentum to the magnitude p_b of the baseball's momentum.
A 2.0 kilogram mass hang from two ropes that are attached to the ceiling. Each rope makes an angle of 60o with the ceiling. Evaluate the tension in each rope
An electrically neutral model airplane is flying in a horizontal circle on a 2.5 meter guideline, which is nearly parallel to the ground. Evaluate the magnitude of the charges
After 2.02 days, the activity of a sample of an unknown type radioactive material has decreased to 88.2% of the initial activity. What is the half-life of this material
you are the prosecuting attorney in a case. you are eliciting testimony from your star witness who has said that he was
A moving electric charge is subject to a magnetic force in the presence of a magnetic field. Define how do you determine the direction of the magnetic force
More ice, from a refrigerator at -16.0 °C, is added to the mixture in the bucket, and when thermal equilibrium has been reached, the total mass of ice in the bucket is 0.768 kg. Assuming no heat exchange with the surroundings, what mass of ice was..
The Flux of the E-Field is a scalar. If the net charge enclosed by a Gaussian Surface is zero, then byGauss' Law, the E-Field is zero at all points on the surface.
In intravenous feeding, a needle is inserted in a vein in the patient's arm and a tube leads from the needle to a reservoir of fluid (density 1050 kg/m3) located a height h above the arm. find the minimum value of h that allows fluid to enter the v..
The theoretical work of Dirac suggested that for every particle there should exist a corresponding antiparticle. The first to be antiparticle to be discovered was the positron. State what is meant by an antiparticle giving one example. What happen..
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