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There is a delay from the time someone sees a flash of lightning to the time that thunder is heard due to the time it takes for sound to travel from where the lightning struck to where you are when you hear the thunder. If you hear thunder 13 seconds after seeing the lightning, how far away did the lightning bolt strike? Take the speed of sound in air to be 343 m/s. Answer in metres.
An unknown nucleus has twice the volume of a nucleus with 62 nucleons. What is the atomic mass number of the unknown nucleus
Two 10.0 kg masses are hanging from the ceiling of an elevator that is accelerating upwawrd at 2.00 m/s. What is the tension in each rope
A 66.0 kg person throwsa 0.0400 kg snowball forwardwith a ground speed of 32.0 m/s. A second person, with a massof 59.0 kg, catches thesnowball. Both people are on skates. The first person is initiallymoving forward with a speed of2.00 m/s, and th..
A spaceship moves past you at speed v. You calculate the ship to be 364 m long, whereas an astronaut on the ship measures a length of 420 m. Find v.
Two thin lenses of focal lengths f1 = 15.0 and f2 = 10.0 cm, respectively, are separated by 35.0 cm along a common axis. The f1 lens is located to the left of the f2 lens. An object is now placed 50.0 cm to the left of the f1 lens, and a final ima..
Approximately how thick is the film of soap in the reddish region of the fourth stripe indicated? Assume that the film is nearly perpendicular both to your line of sight and to the light rays from the lamp, For simplicity, assume that the region s..
A pendulum bob of mass m is attached to a massless string of length L. If the bob is released from rest at a horizontal position, What is the tangential acceleration of the bob
An automotive battery has an emf of 12.0 V. When supplying power to the starter motor, the terminal voltage of the battery is 11.2 V and the current in the battery is 16 A. What is the internal resistance of the battery?
A heating element in a stove is designed to dissipate 3380 W of heat when it is connected to 200 V. Assuming that the resistance is constant, Calculate the power the heating element dissipates
Two blocks are resting on a horizontal surface. The blocks are in contact with each other and a horizontal force of300 N is pushing on the left block which is m1 ontom2 which is on the right. What is the acceleration of the masses
Two identical wires with a weight of 4.95E+4 N/m, are located one above the other, in a vertical plane above the surface of the earth. The wires are aligned north-south so that the earths's magnetic field will not affect them.
A car's starter motor draws 48 Amp from the car's battery during startup. If the startup time is 3.4 second, determine how many electrons pass a given location in the circuit during that time
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