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Question: An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is s = 2.90 10-7 C/m2, and the plates are separated by a distance of 1.1 x 10-2 m. How fast is the electron moving just before it reaches the positive plate?
A 126.6 {\rm N} carton is pulled up a frictionless baggage ramp inclined at 33.0^\circ above the horizontal by a rope exerting a 75.4 {\rm N} pull parallel to the ramp's surface. Calculate the work done on the carton by the rope
Point charges q1=+2.00?C and q2=?2.00?C are placed at adjacent corners of a square for which the length of each side is 4.50cm, What is the electric potential at point b
a 2.50 a current is carried by a copper wire of radius 1.0 mm. if the density of conduction electrons is 8.0e28m3 what
A 1300 kg wrecking ball hangs from a 14 m -long cable. The ball is pulled back until the cable makes an angle of 26.0o with the vertical. By how much has the gravitational potential energy of the ball changed?
a the man hears the sound of the splash 2.8 s after he releases the rock from rest. the speed of sound in air at the
1. On air track, a 2kg cart moving at 1m/s to the right collides with a 1kg cart moving at 3 m/s to the left. After the collision, the 2kg cart is moving at 2m/s to the left. What is the velocity and direction of the 1 kg cart after the collis..
When Philippe Petit was in the middle of the wire between the World Trade Center Towers the wire depressed 1 ft. If during his 40 minutes of tricks the wire began to oscillate up and down from this equilibrium position by 6 inches, where is his ki..
A light bulb is connected to a 120.0-V wall socket. The current in the bulb depends on the time t according to the relation I = (0.703 A) sin [(257 rad/s)t]. Determine the resistance of the bulb's filament
Calculate the kinetic energy of a proton traveling 2.53×108 m/s . Express your answer with the appropriate units. Part B Calculate the momentum.
Two converging lenses, each of focal length 14.9 cm, are placed 39.4 cm apart, and an object is placed 30.0 cm in front of the first lens. What is the magnification of the system
You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball. How tall is the building that the child is standing on
A 61.0-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.760 and 0.430, What horizontal pushing force is required to just start the crate moving
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