For every 100 joules of useful energy output , the heater wastes 100 joules , find the input energy of the heater.

According to the law of conservation of mass, in a chemical reaction the total starting mass of all the reactants equal the total final mass of all the products. true or false?

Choose each of the settings that follow and list them below do it ill mark brainliest first object= position= speed= acceleration= second object= position= speed= acceleration=

What was the first instrument to ever record an earthquake?