A cup of hot chocolate is left out on the table. It becomes cold. explain what happened to the amount of heat energy in the hot chocolate.

are the particles in the liquid when the liquid is hot or cold? Explain

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?