Write a set of instructions that describe how to find the density of an object. Write the instructions so that they work for a regularly shaped object and for an irregularly shaped object.

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

Which metal exist in liquid state and can be cut with knife ?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.