How would you determine whether a change in matter is a physical change or a chemical change?

If in Round 1 the change of spending is 400, the change of consumption is 320 and the change of savings is 80, how would I determine the changes in Round 2, Round 3, Round 4 etc???

1. Explain the following curves giving the boiling point, melting point or freezing point of a substance: Evaporation curve Freezing curve Melting curve 2. What causes matter to change states? 3. What is qualitative and quantitative properties of matter...

Determine a single transformation that will change the left equation to the right...? Determine a single transformation that will change the left equation to the right... i)x^2+4y^2=1 -----> x^2+y^2=4 ii)x^2+2x+y^2=1 -----> x^2+y^2+2y=1 iii)x...

A plant grows into a shrub A steak well cooked Are there any obvious characteristic that you can tell right away if it's a chemical change or a physical change?

1. what will happen if solid & liquid matter in universe change into gaseous form. Universe will expand or contract gravitational force at one concentrated point? 2. Man changing the nature but change is the law of nature. Man couldn't created anything...

...can't change his mind? People always change their minds on the clothing that they want to wear, their beliefs, and what T.V show they like. If you can change your mind, what makes you think that god can't? The earliest shown bible writing dates back...

Mr. Miyagi me! I want to spend my career fighting climate change in the most meaningful way possible, but have no idea where to focus my energy. Help this idealist find the best convergence of need and opportunity for MBA types. Hi! I recently quit my...

The enthalpy change for the reaction CH(4)+2O(2) --> CO(2) + 2H(2)O is -891KJ a) what is the enthalpy change for each mole of water formed? b) What is the enthalpy change or each ...show more