Rafi made a diagram to compare newton's universal law of gravitation with einstein's general theory of relativity. which label belongs in the area marked x? earth pulls objects toward its center. gravity causes objects to fall to the ground. the curvature of space-time pushes objects toward the ground. gravity is an attractive force in the universe.

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.