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The dielectric to be used in a parallel-plate capacitor has a dielectric constant of 2.40 and a dielectric strength of 1.60 107 V/m. The capacitor is to have a capacitance of 1.31 10-9 F and must be able to withstand a maximum potential difference of 5700 V. What is the minimum area the plates of the capacitor may have?
m2
An airplane wing is designed so that the speed of the air across the top of the wing is 299 m/s, What is the lifting force on a wing of area 21.0 m2
You have a pulley 13.8 cm in diameter and with a mass of 2.1 kg. You get to wondering whether the pulley is uniform. What is the moment of inertia if the pulley is uniform
A small rubber ball is launched by a compressed-air cannon from ground level with an initial speed of 18.9 m/s directly upward. How long does it take to reach the maximum height
The middle C string on a piano is under a tension of 977 N. The period and wavelength of a wave on this string are 3.82 ms, Find the linear density of the string
A brick is thrown vertically upward with an initial speed of 4.90 m/s from the roof of a building. If the building is 98 m tall, how much time passes before brick lands on the ground.
A tall, slender drinking glass with a thin base is initially empty. Where is the center of mass of the glass
A planar electromagnetic wave is propagating in the +x direction. What is the Poynting vector at the point P at that instant
You close the top of your straw with your thumb and lift the straw out of your glass containing Coke. How large is the error (in per cent) if you neglect the air in the straw
A 1.6kg eagle flying 30m/s west grabs a 0.8kg pelican going 30m/s east. What is the final speed of the eagle and pelican together
An airplane pulls a 24 kg banner on a cable as depicted in the figure below. When the plane has a constant cruising velocity the cable makes an angle of ? = 26°. What is the drag force exerted on the banner by the air
string under a tension of 50.5 N is used to whirl a rock in a horizontal circle of radius 2.55 m at a speed of 20.3 m/s on a frictionless surface, What is the breaking strength, in newtons, of the string
A 25 turn circular coil of length 5.9 cm produces a magnetic field of magnitude 1.6 mT at its center. Find the current in the loop
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