In general, real gases behave most ideally at temperatures and pressures.

The behavior of real gases can be described using the van der Waals equation [P + (n2a/V2)](V-nb) = nRT

The values of a and b are given below for the two real gases methane and oxygen.

The gas in which deviations from ideal behavior due to intermolecular forces are expected to be the largest is .

The gas that would be expected to behave most like an ideal gas at high pressures is .

gas a (L2atm/mol2) b (L/mol)

CH4 2.25 4.28×10-2

O2 1.36 3.18×10-2

Which feature indicates that mars resides in the inner region of the solar system

Write the correct abbreviation for each metric unit

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?