Apendulum that moves through its equilibrium position once every 1.000 s is sometimes called a seconds pendulum (a) what is the period of any seconds pendulum? (b) in cambridge, england, a seconds pendulum is 0.9942 m long. what is the free-fall acceleration in cambridge? (use 4 significant figures in your answer.) (c) in virginia beach, virginia, a seconds pendulum is 0.99284 m long. what is the free fall acceleration in virginia beach, virginia? (use 5 significant figures in your answer.) m/s m/s

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?

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

Apatient has a history of poor nutrition. he has skin rashes, bleeding gums, and a cut that hasn’t healed in a long time. what vitamin deficiency most likely caused this symptom?