Physics, 22.09.2021 14:00 Jharsh2300
O objeto representado abaixo está em repouso quando surge uma força de 50N. A massa do objeto é de 10kg e a força de atrito entre o objeto e a superfície é de 20N. Determine a aceleração que ele adquire e a velocidade me 10 segundos.
a) 5m/s2 e 50m/s; b) 3m/s2 e 30m/s; c) 2m/s2 e 20m/s;
d) 3m/s2 e 20m/s; e) n. d.a.
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Ared apple is illuminated by a blue light the apple will appear
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Search coils and credit cards. one practical way to measure magnetic field strength uses a small, closely wound coil called a search coil. the coil is initially held with its plane perpendicular to a magnetic field. the coil is then either quickly rotated a quarter-turn about a diameter or quickly pulled out of the field. (a) derive the equation relating the total charge q that flows through a search coil to the magnetic-field magnitude b. the search coil has n turns, each with area a, and the flux through the coil is decreased from its initial maximum value to zero in a time ∆t. the resistance of the coil is r, and the total charge is q = i∆t, where i is the average current induced by the change in flux. (b) in a credit card reader, the magnetic strip on the back of a credit card is rapidly “swiped” past a coil within the reader. explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip. (c) is it necessary that the credit card be “swiped” through the reader at exactly the right speed? why or why not?
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Physics, 22.06.2019 15:20, avree4722
Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.
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Physics, 22.06.2019 17:40, RayshawnBoulware
A15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°c to 175°c. what is the specific heat capacity of iron?
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O objeto representado abaixo está em repouso quando surge uma força de 50N. A massa do objeto é de 1...
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