Why does a correction to the volume need to be made for the inverted graduated cylinder

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

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.