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When plasma density in the ionosphere has a peak value of 1012 per cubic meter at an altitude of 350 km, what is the maximum usable frequency and the maximum range for a communications link using a single ionospheric reflection?
What are the design features in an aircraft that affect an aircraft's takeoff and landing performance? Research an airplane and describe what features are used.
Particles called ?-mesons are created by accelerator beams. If these particles travel at 2.80 ? 108 m/s and live 2.60 ? 10-8 s, how long do they live as viewed in the laboratory
Energy is transferred in solids by conduction, which means that. Heat travels in both directions. Heat travels from the cooler object to the hotter object. Heat does not travel between objects of different temperatures.
A49.0 g sample of a conducting material is all that is available. The resistivity of the material is measured to be11 multiplied by 10-8 · m, What must be the diameter of the wire
A carousel is initially at rest. At t=0 it is given a constant angular acceleration a=0.060 rad/s2, which increases its angular velocity for 8.0s. determine the angular velocity of the corousel
A hiker, who weighs 916 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs3060 N, and rests on two concrete supports, one on each end. Hestops 1/4 of the way along the bridge
A 100.0-W light bulb is 20.0 percent efficient. This means that 20.0 percent of the electric energy is converted to light energy. How many joules of thermal energy does the light bulb produce each minute?
Light of wavelength 420 nm is incident normally on a film of water 1.0 µm thick. The index of refraction of water is 1.33. What is the wavelength of the light in the water? How many wavelengths are contained in the distance 2t, where t is the thickne..
When Albert turns on his small desk lamp, the light falling on his book has intensity Io. When this is not quite enough he turns the small lamp off, What is the intensity of light falling on the book
One possibility for a low-pollution automobile is for it to use energy stored in a heavy rotating flywheel. What is the angular velocity of the flywheel when it has a full "energy charge"
A block with mass mA = 11.0kg on a smooth horizontal surface is connected by a thin cord that passes over a pulley to a second block with mass mB = 6.0kg which hangs vertically
Suppose a bat uses sound echoes to locate its insect prey, 3.00 m away. What is the percent uncertainty does this cause for the bat in locating the insect
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