Answers: 1
Physics, 22.06.2019 04:30
You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at β20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?
Answers: 2
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 βt. the resistance of the coil is r, and the total charge is q = iβt, 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 βswipedβ 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 βswipedβ through the reader at exactly the right speed? why or why not?
Answers: 2
Physics, 22.06.2019 16:20
Select the correct answer. what does the process of natural selection involve?
Answers: 1
Electric force is blank proportional to the amount of charge and blank proportional to the square of...
Chemistry, 18.12.2019 06:31
Mathematics, 18.12.2019 06:31
History, 18.12.2019 06:31
Mathematics, 18.12.2019 06:31
English, 18.12.2019 06:31
Biology, 18.12.2019 06:31
Mathematics, 18.12.2019 06:31
Mathematics, 18.12.2019 06:31
Mathematics, 18.12.2019 06:31
Physics, 18.12.2019 06:31