Which of the following represents a pair of isotopes? Choose 1
130
56 Ba and 130,
55
Cs
B
15.Ba and Ba
156 Ba and 13 Ba?

What properties of a moving object are used in determining the object's energy of motion

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.

What part of the ear is names after tools, such as the hammer and the anvil?