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An electron and a positron have masses of 9.11 10-31 kg. They collide and both vanish, with only electromagnetic radiation appearing after the collision. If each particle is moving at a speed of 0.25c relative to the laboratory before the collision, determine the energy of the electromagnetic radiation.
Consult to explore a model for solving this problem. A person pushes on a 55-kg refrigerator with a horizontal force of -280 N; What is the magnitude of the largest pushing force
A long wire is known to have a radius greater than 5.2 mm and to carry a current that is uniformly distributed over its cross section, What is the radius (in mm) of the wire
An ideal heat engine absorbs 81.2 kJ of heat and exhausts 66.1 kJ of heat in each cycle, How much work is done in a cycle
An elevator cable can withstand a maximum tension of 19,500N before breaking. The elevator has a mass of 480 kg and a maximum acceleration of 2.24 m/s2. Engineering safety standards require that the cable tension never exceed two-thirds of the breaki..
A golf club strikes a 0.045-kg golf ball in order to launch it from the tee. find With what speed does the ball leave the club
A molecule of DNA (deoxyribonucleic acid) is 2.05 µm long. The ends of the molecule become singly ionized: Determine the effective spring constant of the molecule
A 6.50 g bullet moving at 726 m/s strikes a 590 g wooden block at rest on a frictionless surface. What is the speed of the bullet-block center of mass
A bowling ball weighing 71.2 is attached to the ceiling by a 3.50 rope. The ball is pulled to one side and released; it then swings back and forth like a pendulum. As the rope swings through its lowest point, speed of the bowling ball is measured a..
Oxygen has a molar mass of 32.0g/mol. What is the root-mean-square speed of an oxygen molecule at a temperature of 298K
A car of mass 1200 kg turns a corner inclined at 55 deg at a speed of 20 m/s. What is the maximum radius for the curve at which the car will not slide down the incline
Four charged particles are at the corners of a square of side. (Let A = 3, B = 4, and C = 5.) (a) Determine the electric field at the location of charge q.
The middle C string on a piano is under a tension of 911 N. The period and wavelength of a wave on this string are 3.82 ms, Find the linear density of the string
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