SOMEONE PLEASE HELP ME WITH THIS SCIENCE/PHYSICS TEST QUESTION. THE CORRECT ANSWER SHALL BE MARKED AS BRAINLIEST AND I WILL ALSO FOLLOW YOU. (THE GRAPH IS IN THE PHOTO) THANKS XOXO

Emma wanted to investigate the resistance of a sample of a material.

Graph 1 shows how the resistance changes with length.

(THE GRAPH IN THE PHOTO)

Length in centimetres

(i) The current through a 20 cm length of conducting putty was 0.15 A.

Use Graph 1 to find the resistance of a 20 cm length of conducting putty.

Resistance = . ohms

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An uplifted block of rock between two normal faults

From center station, a train departs every 30 minutes on the fast line and a train departs every 50 minutes on the state line. if two trains depart from center station at 8: 00 a.m., one on each of the two lines, what is the next time that two trains, one on each line, will depart 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?