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Two identical point charges of +2.00 C are fixed to diagonally opposite corners of a square. A third charge is then moved to and fixed at the center of the square, such that it causes the potentia
A 145g baseball is thrown by a pitcher exerting an average force of 75N over a distance of 1.6 m. What is the speed of the baseball as it leaves the pitcher's hand?
A space traveller whose mass is 115kg leaves earth. What are his weight and masson earth and in interplanetary space where there are no nearby planetary objects?
A floppy disk for a personal computer rotates with a constant angular speed of 31.4 rad/s about an axis perpendicular to the disk at its center. (a) Find the tangential speed of a point that is 0.04
(a) How much work does she do in changing her gravitational potential energy? (b) What is her efficiency (expressed as a fraction between 0 and 1) in doing the work in part (a)?
(a) How far below the release point is the center of mass of the two stones at t = 390 ms? (Neither stone has yet reached the ground.) (b) How fast is the center of mass of the two-stone system movi
What wavelength light would have to fall on sodium (with a work function of 2.46 eV) if it is to emit electrons with a maximum speed of 1.60 multiplied by 106 m/s?
Air in a cylinder is compressed to one-ninth its original volume with no change in temperature. If a valve is opened to let out enough air to bring the pressure back down to its original value, wha
A capacitor (capacitance C1) is connected across the terminals of an ac generator. Without changing the voltage or frequency of the generator, a second capacitor (capacitance C2) is added in series
Micah and will watched a skater at a steady speed around an oval rink. Micah said the skater had no accelaration.Will said that the skater was accelarating, who is rigth?
Suppose a car is traveling at 12.0 m/s, and the driver sees a traffic light turn red. after 0.510s have elapsed, the driver applies the brakes, and the car desacelerates at 6.20 m/s2. what is the st
What is the speed of a transverse wave in a rope of length 2.60 m and mass 43.0 g under a tension of 460 N?
A force of 315N is applied horizontally to a wooden crate in order to displace it 35m across a level floor at a constant velocity. As a result of this work the crate's internal energy is increased b
One tire is inflated to a pressure of 40 {rm psi} and goes a distance of 19.0 m; the other is at 105 {rm psi} and goes a distance of 93.7 m. Assume that the net horizontal force is due to rolling fr
The pressure outside the cylinder is 1.01 X 10^5 Pa. Heat (2093 J) is removed from the gas. Through what distance does the piston drop?
What tension in Newtons must a 50 cm length of string support in order to whirl an attached 2000 g stone in a circular path at 5 m/s?
Find the equilibrium temperature that results when one kilogram of liquid water at 373-degrees K is added to two kilograms of liquid water at 283-degrees K in a perfectly insulated container.
The kinetic energy Kt the proton will have on the other side of the barrier if it tunnels through the barrier, and (c) the kinetic energy Kr it will have if it reflects from the barrier?
A boat's speed in still water is 1.95 m/s . The boat is to travel directly across a river whose current has speed 1 m/s . Determine the speed of the boat with respect to the shore.
A starship is circling a distant planet of radius . The astronauts find that the acceleration due to gravity at their altitude is half the value at the planet's surface. How far above the surface ar
It takes 0.555 s for the big rig to completely pass onto a bridge 450 m long. For what duration of time is all or part of the truck-trailer combination on the bridge?
An electron remains stationary in an electric field directed downward in the earth's gravitational field. If the electric field is due to charge on two large parallel conducting plates, oppositely
This field changes at a constant rate from 24 to 42 mT in a time of 43 ms. What is the magnitude of the induced 41 mT?
The driver of an 1800 kg car traveling at 23.0 m/s slams on the brakes, locking the wheels on the dry pavement. The coefficient of kinetic friction between rubber and dry concrete is typically 0.700.