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An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is = 1.6 x 10-7 C/m2, and the plates are separated by a distance of 1.3 x 10-2 m. How fast is the electron moving just before it reaches the positive plate?
A 10-m-long glider with a mass of 780kg(including the passengers) is gliding horizontally through the air at 30m/s when a 70Kg skydiver drops out by releasing his grip on the glider. What is the glider's speed
What is an expression for the maximum displacement of m2
Three unknown resistors are in a bin; let's call them red, green, and blue. When a Physicist connects the three resistors in series to a 30 volt source she measures 1A of current. what is the charging time constant
The force stretching the D string on a certain guitar is 170 N. The string's linear mass density is 0.006 kg/m, What is the speed of the waves on the string
q1. 1.76- block at rest on a ramp of height. while the block is released it slides without friction to the bottom of
a sled is resting on packed snow. the coefficient of kinetic friction is now only 0.12. if a person weighing 650 N sits on the sled, what force is needed to pull the sled across the snow
Two block each of 3.0 kg are held by strings. The upper string exerts a force F of 100 Newtons. find the force exerted by the lower string on the lower block
A rubber balloon filled with air is rubbed against a wool sweater and acquires a negative charge. The balloon is placed up against a flat wall and released. The balloon stays stuck to the wall. How is this possible if the wall is not charged in an..
A ball is thrown from the brink of a cliff 15.0 m high with an initial velocity of v0 = 7.0 m/s at an angle q0 = 26.0 o above the horizontal. How long does it take to land
Fireflies emit flashes of light to communicate, directly converting chemical energy into the energy of visible-light photons. How many photons does the firefly emit during each flash
A 120 granite cube slides down a 40 degree frictionless ramp. At the bottom, just as it exits onto a horizontal table, it collides with a 290 steel cube at rest. How high above the table should the granite cube be released to give steel cube a spe..
A converging lens can be used as a lighter (on a sunny day). If you want to use it to light a match, where should you put the match, What is the radius of the mirror
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