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A typical compact disc stores information in tiny pits on the disc's surface. A typical pit size is 1.2 ?m. What's the frequency of electromagnetic waves that have a wavelength equal to the typical CD pit size?
How much must this spring be stretched to store.
A parallel-plate capacitor is formed from two 9.10cm x 9.10cm electrodes spaced 2 mm apart. The electric field strength inside the capacitor is 5.00*10^6 . What is the charge (in nC) on each electrode ?What is the final velocity of the electron.
If the patch is 78 meters wide and the average force of air resistance on the skier is 179 newtons, explain how fast is she going after crossing the patch?
An ac series circuit has an impedance of 196 ? , and the phase angle between the current and the voltage of the generator is ? = -72°. The circuit contains a resistor and either a capacitor or an inductor
Find an angular velocity of the tire at the marker. Find also the linear speed of the point of contact of the tire with the pavement at the marker.
A plane first moves from the origin to point A located at 170 km in direction of 30 degree north of east after that it flies 150 km 20 degree west of north to point B finally it flies 195 km due west to point C. find the location of C from origin.
Suppose the slope of a beach underneath the ocean is 20 cm of dropoff for every 1.6 m of horizontal distance. A wave is moving inland, slowing down as it enters shallower water. What is its acceleration when it is 11 m from the shoreline?
Assume a constant upward slope of 32; calculate the horizontal and vertical components of the acceleration of a truck that slowed from 140 to rest in 7.3.
Consider a tungsten filament in a light bulb. After the bulb has been on for an hour, how has the resistance in filament changed (if at all).
In a period of 1 s, 4.00 x10^23 nitrogen molecules strike a wall with an area of 6.30 cm2. If the molecules move with a speed of 300 m/s and strike wall head-on in elastic impacts, what is the pressure exerted on the wall? (The mass of one N2 mole..
What is the magnitude of the torque exerted by the entire flagpole at the point of contact with the building.
A ball is thrown straight upward and reaches the top of its path in 1.71 s (before it starts to come back down). A second ball is thrown at an angle of 38.2 degrees with the horizontal. At what speed must the second ball be thrown so that it rea..
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