This graph shows the energy of a reaction over time. Which statement is true?

A. H represents the energy of the products.

B. G represents the activation energy.

C. G represents the energy of the products.

D. F represents the activation energy

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.