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A large, thin plastic disk wth diameter D=3.0 meters carries a uniformlydistributed charge of Q= -3.0 x 10^-5 C. An uncharged circular piece of aluminum foil is placed at a distance x=3.0 mm from the disk, and parallel to the disk surface. The foil has a diametet d=4.0 cm and a thickness t= 1.0mm. Calculate the magnitude q of the charge on the left circular face of the foil (the face closest to the plastic disk). Explain your reasoning.
The magnitude of the acceleration due to gravity
A 38.0 kg child swings in a swing supported by two chains, each 3.04m long. The tension in each chain at the lowest point is 429N. Find out the child's speeds at the lowest point.
A gas bubble with an initial volume of 7.00 milliliters rises from a depth of meters. If the temperature does not change, what is its volume, to nearest ml, when it reaches the surface (density of water=1000 kg/m^3)?
Find the net downward force on the tank's flat bottom, of area 1.60 m^2, exerted by water and air inside the tank and air outside the tank.
Two parallel rods are each 0.50 m in length. They are attached at their centers to either end of the spring (spring constant = 150 N/m) that is initially neither stretched nor compressed.
A particular Ferris wheel has a radius of 24 meters, and it makes one complete revolution around its axle (at location A) in 20 seconds. In all of the following questions, consider location A (at the center of the axle) as the location around whic..
An engine goes through the following cycle with 2.20 sample of a diatomic gas. I. an isothermas expansion from point a to point b. II. a constant pressure compression from point b to point c. III.
compass needle points 25 degrees E of N outdoors. However, as it is placed 17 cm to the east of a vertical wire inside a building it points 61 degrees E of N. What is the magnitude of the current in the wire? The earth field there is 0.50X10^-4 T ..
Astronomers discover a binary star system that has a period of 93.0 days. The binary star system consists of two equal-mass stars, each with a mass twice that of the sun, that rotate like a dumbbell about the centre of mass at the midpoint between..
How much energy is dissipated during the 5 minute interval.
illustrate what is the magnitude of the normal force exerted on the car by the walls of the cylinder at point A (at the bottom of the vertical circle)?
Two bars of identical mass are at 30 °C. One is made from glass and the other from another substance. The specific heat capacity of glass is 840 J / (kg • C°).
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