The two objects shown are made of the same element. What else is true of both objects?
A. They have the same mass
B. They are made of only one kind of atom
C. They have the same number of atoms.
D. They have the same shape

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.

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?

While carrying a heavy box up the stairs,you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.