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An electrically neutral model airplane is flying in a horizontal circle on a 2.1-m guideline, which is nearly parallel to the ground. The line breaks when the kinetic energy of the plane is 50 J. Reconsider the same situation, except that now there is a point charge of +q on the plane and a point charge of -q at the other end of the guideline. In this case, the line breaks when the kinetic energy of the plane is 51.9 J. Find the magnitude of the charges.
In a supernova, a red giant of mass 1.19*1031 kg collapses into a neutron star of mass 5.97*1030 kg
A helium-filled balloon escapes a child's hand at sea level and 21.1 deg C. how will its volume compare to that at sea level
An air puck of mass \(m_{1}\) is tied to a string and allowed to revolve in a circle of radius R on a frictionless horizontal table. determine the radial force acting on the puck
Two window washers, Bob and Joe, are on a 3.00 m long, 405 N scaffold supported by two cables attached to its ends. Bob weighs 720 N and stands 1.00 m from the left end, as shown in Figure P8.70.
A nuclear power plant operates at 76% of its maximum theoretical Carnot efficiency between temperatures of 630C and 360C. how much exhaust heat is discharged per hour
Two electrons in an atom are separated by 1.5 × 10^?10 m, the typical size of an atom, What is the force between them
A glass rod is rubbed with silk and acquires a charge ofmagnitude 7.50 nC. What is the change in mass of the rod
A 0.285-kg volleyball approaches a player horizontally with a speed of 14.0 m/s, What impulse is delivered to the ball by the player
A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, What was the bear's average velocity
Physics: Speed of car at bottom of driveway; initial speed of bullet, 20 A 2.10 x 10³ kg car starts from rest at the top of a 5.0 m long driveway that is sloped at 20° with the horizontal. If an average friction force of 4.0 x 10³ N impedes the mo..
Rate Equations in a Four-Level Laser. Consider a four-level laser with an active volume V = 1 cm ^3 . The population densities of the upper and lower laser levels are N 2 and N 1 and N = N 2 - N 1 . The pumping rate is such that the steady-state p..
the atomic mass of lithium-6 is 6.015123 u. how much energy is required to completely separate the nucleons in a
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