Answers: 3
Physics, 21.06.2019 17:00
Heat from the sun reaches earth to a. radiation b. convection c. conduction
Answers: 2
Physics, 22.06.2019 03:00
Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.
Answers: 2
Physics, 22.06.2019 06:30
What are similarities and differences between refraction, reflection, diffraction and absorption?
Answers: 3
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
Which of the following are whole grains that may be listed as ingredients on a food label...
Mathematics, 23.05.2020 16:58
Mathematics, 23.05.2020 16:58
Mathematics, 23.05.2020 16:58
Health, 23.05.2020 16:58
Mathematics, 23.05.2020 16:58
History, 23.05.2020 16:58
Mathematics, 23.05.2020 16:58
Chemistry, 23.05.2020 16:58
Social Studies, 23.05.2020 16:58
Mathematics, 23.05.2020 16:58
Biology, 23.05.2020 16:58
Mathematics, 23.05.2020 16:58