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A certain species of ionized atoms produces an emission line spectrum according to the Bohr model, but the number of protons Z in the nucleus is unknown. A group of lines in the spectrum forms a series in which the shortest wavelength is 22.79 nanometers and the longest wavelength is 41.02 nanometers. Obtain the next-to-the-longest wavelength in series of lines.
A 16 mH inductor is connected across an AC generator that produces a peak voltage of 11V. What is the peak current through the inductor
A cosmic ray electron moves at 7.00 multiplied by 106 m/s perpendicular to the earth's magnetic field at an altitude where field strength is 1.20 multiplied by 10-5 T
The drawing shows four point charges. The value of q is 2.06 µC, and the distance d is 0.98 m. Find the total potential at the location P. Assume that the potential of a point charge is zero at infinity. 1 V
The magnetic field perpendicular to a circular wire loop 11.2cm in diameter is changed from +0.50Tto -0.33T in 130ms, In what direction does the induced current flow?
A bowling ball of mass 7.1 kg and radius 9.0 cm rolls without slippingdown a lane at 5.2 m/s. Calculate its total kinetic energy
A frictionless pulley has the shape of a uniform solid disk of mass 2.80kg and radius 10 cm. What percent of the total kinetic energy does the pulley have
two point charges have a total charge of 555 microc. when placed 1.30 m apart the force each exerts on the other is
What is the greatest height reached by the ball? Compute the time at which the ascending ball reaches a height of 15m above the ground. A ball is thrown vertically upwards with an initial velocity of 20.72 m/s. Neglecting air resistance, how long is ..
A cylinder contains 3.5 {\rm L} of oxygen at350 {\rm K} and 2.4 {\rm atm}. The gas is heated, causing a piston in the cylinder to move outward. The heating reasons the temperature to rise to 610 {\rm K} and the volume of the cylinder to increase to 9..
A person weighs 695 {\rm N} in air however only 495 {\rm N} when standing in water up to the hips. Discover the volume of each of the person's legs (in m3)
The armature of a shunt motor has a mass of 250 kg and a diameter of 30 cm. assume the mass of the amature is evenly distributed in the armature. find the rotational inertia of the armature.
An astronaut measures her mass by means of a device consisting of a chair attached to a large spring. what is the mass of the astronaut and chair
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