Which object below has the lowest resistance? All three have length L and are made out of the same material
2
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Earth's core is
a. liquid. b. part solid and part liquid. c. solid. d. molten.
A 100-N uniform ladder, 8.0 m long, rests against a smooth vertical wall. The coefficient of static friction between ladder and floor is 0.30 . What minimum angle can the ladder make with the floor before it slips?
a. 22° c. 18° b. 51° d. 59°
Calculate the current through a 10.0-m long 22 gauge (having radius 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. The resistivity of nichrome is 100 × 10-8 ? ? m
A) 17.5 A B) 30.9 A C) 61.8 A D) 388 mA E) 776 mA
According to current theories, how did the sun's planets get here?
A) Stars such as the sun, and planets such as those around the sun, all formed shortly after the big bang, and then gathered into "solar systems" such as we see today. B) Part of the gas and dust that gathered together to form the sun went into orbit around the sun instead of falling into the sun, and this part formed the planets. C) The sun was originally part of the two-star system, the second star split up into pieces, and these pieces developed into the planets. D) A passing star tore off part of the sun, and this part separated into pieces to form the planets. E) After the sun had formed, it gathered fully-formed planets from various places as the sun moved through the galaxy.