Physics, 31.08.2020 21:01 pearljammarow6ujs
Which one of the following is a scalar quantity?a. Displacement. b. Perpendicular component of force. c. Parallel component of force. d. Work.
Answers: 1
Physics, 22.06.2019 07:10
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?
Answers: 2
Physics, 22.06.2019 16:30
He latent heat of vaporization for ethyl alcohol is 854 j/g. the amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is
Answers: 2
Physics, 22.06.2019 18:30
Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.
Answers: 1
Which one of the following is a scalar quantity?a. Displacement. b. Perpendicular component of force...
Mathematics, 26.06.2019 16:00
Mathematics, 26.06.2019 16:00
Social Studies, 26.06.2019 16:00
Social Studies, 26.06.2019 16:00
Mathematics, 26.06.2019 16:00
Chemistry, 26.06.2019 16:00
Mathematics, 26.06.2019 16:00
Social Studies, 26.06.2019 16:00
Biology, 26.06.2019 16:00