How does the resistance of a wire change with:
(i) its length is tripled? (ii) its diameter is halved?
(iii) the material is changed to one whose resistivity is three times?

Which object is most likely represented by a dot?

Argon, neon, and xenon are examples of

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.