momentum= mass × velocity
p= 50×18
momentum= 900 kg m/s
Answer:
just search it up you'll get ur answer
Water breaks down into hydrogen and oxygen: It is a decomposition reaction as a single substance decomposes to give two products.

Leaves make starch using chlorophyll and carbon dioxide: Synthesis reaction: as the synthesis reaction involves two or more than two reactants which join together to result into a single main product along with the formation of simple by products.

Food burns in oxygen gas and releases a lot of energy: Combustion: Combustion process involves the use of oxygen to give products along with release of energy.

Adding vinegar (acid) to baking soda (alkali) gives a product that is neither acidic nor alkaline: Neutralization: acetic acid in vinegar reacts with soda (base) to give salt (neutral) and .

Answer:
Explanation:
solid is particles packed up together like a family.
liquid is made out of particles as well but the are a little spaced out like a bunch of friends going home after a busy school day.
A solid changes state because when heat is applied it states changing state into a liquid.
like you freeze an ice cube and when it out on a summer day in a drink it starts melting AKA (A SOLID + HEAT =A LIQUID