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If a test charge is positioned near a charged body, does the charge itself exert a force directly acting on the test charge, or is there something else present that exerts a force on the test charge?
A pot containing 1.04 liter of water, initially at 18°C, is placed on a 1091 W electric heating element. (a) How much heat must be supplied to the water to bring it to a boil? . (b) How much heat is necessary to boil all the water away? . What is the..
A diver has a birthmark of area 2.0 cm^2. When the birthmark is 4.0 meters beneath the surface of the pool, what is the contact force exerted by the water on this birthmark
An 82 g arrow is fired from a bow whose string exerts an average force of 95N on the arrow over a distance of 77.00 cm. What is the speed of the arrow as it leaves bow.
A mass M is suspended using two cables which make angles of theta_1 and theta_2 with the horizontal across the top. What is the tension (T_1) in the left-handed cable
A spaceship of mass 2.20×106kg is cruising at a speed of 4.20×106m/s when the antimatter reactor fails, blowing the ship into three pieces
A 1.1 µF capacitor has an electric field of 1.2x105 V/m between two metal plates 1 mm apart. What is the energy stored on the capacitor
monochromatic light falls on a screen 1.90 m from two slits separated by 2.07 mm. the first- and second-order bright
Under standard conditions, the density of air is 1.293 kg/m3 and that of helium is 0.178 kg/m3. What must be the minimum diameter of the spherical balloon
With the rod initially horizontal, a 44 gm wad of wet putty drops onto one of the balls with a speed of 3.7 m/sec and sticks to it.
Two masses m1 and m2 are connected by a string which goes over an ideal pulley. What is the acceleration of each mass
A toroid of mean radius 28 cm and circular cross section of radius 2.3 cm is wound with a superconducting wire of length 1000 m that carries a current of 430 A. What is the number of turns on the coil
A 4.5- kg box of books is pulled up a 3.66- m-long inclined plank to a height of 1.4 m. What percent of the work is lost to friction
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