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The velocity of an airplane with respect to the ground is 2.00 x 102 m/s at an angle of 30.0 degrees NORTH of EAST. The velocity of the airplane with respect to the air is 1.50 x102 m/s at an angle of 60.0 degrees NORTH of EAST. What is the velocity of the air with respect to the ground?
In the Bohr model of the hydrogen atom, an electron in the 7th excited state moves at a speed of 4.47 104 m/s in a circular path having a radius of 2.59 10-9 m
An insulating rod of length 8.0-cm and charge 30 nC is in a plane with a long straight uniform line charge. What is the electric force on the rod
A charging RC circuit controls the intermittent windshield wipers in a car. The emf is 12.0 V. What resistance should be used in the charging circuit if the wipers are to operate once every 1.40 s
An electron and a proton are initially very far apart (effectively an infinite distance apart). which is the change in the electric potential energy
A 0.700-kg ball is on the end of a rope that is 2.50 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, What is the tangential speed of the ball
The power of a certain CD player operating at 120V rms is 20.5W. determine the maximum instantaneous power
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.18 m2 and whose thickness is 2.3 mm. what is the percentage lost by the window
The energy released by each fission within the core of a nuclear reactor is 2.00 x 102 MeV. Determine the power (in watts) that the reactor generates
The two surfaces of a plastic converging lens have equal radii of curvature of 25.0cm, Calculate the index of refraction of the plastic
A certain type of laser emits light that has a frequency of 5.6 x 10^14 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 3.9 x 10-11 s.
Sound with a frequency 700 Hz from a distant source passes through a doorway 1.07 m wide in a sound-absorbing wall. Find the number of the diffraction minima at listening positions along a line parallel to the wall
A standing wave on a 75.0cm long string has three antinodes. The Wavelength is .50m. If the string has linear mass density 3.78×10?5kg/m and tension 10.5N , what are the wave's frequency
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