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A parallel plate capacitor has plates each of area 100 cm2 and with separation 0.25 mm. If this capacitor is charged with 25 pC, what is the average charge density on the positive plate?
Force F = -13jhatN is exerted on a particle at r = (3ihat+5jhat)m. What is the torque on the particle about the origin
Using the Lagrangian approach outlined in class (or whatever your favorite method is) derive the coupled dierential equations for a quadruple pendulum with unequal masses and lengths. Solve the equations (either analytically or numerically) and pl..
The critical density of the universe is 5.80×10^?27 kg/m^3. Assuming that the universe is all hydrogen, express the critical density in the number of H atoms per cubic meter.
In a certain RLC circuit, a46-?resistor, a11-mH inductor, and a 5-µF capacitor are connected in series with an AC power source for which Vrms=12V andf= 100 Hz. Calculate the phase between the current and the voltage.
a solid cylindrical disk has a radius of 0.25 m and it can rotate about a vertical axis.a. when a 45 n force is applied
Two converging lenses having focal lengths of f1 = 11.1 cm and f2 = 20.0 cm are placed d = 50.0 cm apart, The final image is to be located between the lenses, at the position x = 28.3 cm.
You are in a hot-air balloon that, relative to the ground, has a velocity of 4.65 m/s in a direction due east. find direction of the hawk's velocity relative to the ground
A typical adult ear has a surface area of 1.45 × 10-3 m2. The sound intensity during a normal conversation is about 2.49 × 10-6 W/m2 at the listener's ear. How much power is intercepted by the ear
An object is placed in front of a diverging lens of focal length of 17.0cm, Using the thin lens equation find the distance from the lens to the object and from the lens to the image
Consider two masses m1 and m2 at the top of two frictionless inclined planes. Both masses start from rest at the same height. However, the plane on which m1 site is at an angle of 30 degrees with the horizontal,
1. a mass-spring system oscillates on a horizontal frictionless surface with an amplitude of 3.94 cm. if the spring
A kayaker needs to paddle north across a 200 wide harbor. The tide is going out, creating a tidal current that flows east at 2.0. The kayaker can paddle with a speed of 3.0. In which direction must he paddle in order to travel straight across the har..
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