Jamie is a hairstylist who works in a salon. he noticed that when many of the stylists are blow drying hair the power goes out. what is the best scientific question that can be asked about jamie’s observations?

a)should the salon create a schedule to allow only a certain number of blow dryers running at once?
b)what is the most energy-efficient blow dryer on the market?
c)should the salon’s wiring be checked by an electrician?
d)does the power go out when a certain number of blow dryers run at the same time?

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?

Heterogeneous mixture with larger particles that never settle is

What structural formula represents 4 electrons shared between two atoms?