Physics, 01.10.2021 01:20 alliehall2002
A painter and his helper are standing on a scaffold. The painter weighs 400 newtons. The helper weighs 300 newtons. The tension in a rope A is 925 newtons. The tension in rope B is 825 newtons. What Is the weight of the board?
Answers: 3
Physics, 21.06.2019 21:10
State one advantage and one disadvantage of using a plane mirrior as a driving mirrior
Answers: 1
Physics, 21.06.2019 23:30
What are chlorofluorocarbons and what impact do they have on the atmosphere?
Answers: 1
Physics, 22.06.2019 02:30
Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.
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
A painter and his helper are standing on a scaffold. The painter weighs 400 newtons. The helper weig...
Physics, 18.03.2021 01:50
English, 18.03.2021 01:50
History, 18.03.2021 01:50
Chemistry, 18.03.2021 01:50
Chemistry, 18.03.2021 01:50
Computers and Technology, 18.03.2021 01:50
History, 18.03.2021 01:50
Computers and Technology, 18.03.2021 01:50
Mathematics, 18.03.2021 01:50
History, 18.03.2021 01:50
Mathematics, 18.03.2021 01:50