Which is a chemical change

Suppose two chemicals are reacted together. It takes 750 kJ of energy to break the bonds of the reactants and 1050 kJ of energy are released by the formation of the products. Which statement is true about the reaction? The reaction is exothermic.

What einstein discovered about space and time is that they?

Where do television waves come from? Where do radio waves come from?

What is internal energy?

How do I multiply gravity with mass in finding potential energy with the equation pe=mgh

In a lab environment, you are investigating the impulse of a force exerted on a brick when the brick's speed is reduced from 2.5 m/s to a complete stop.

3. What are the challenges of looking for Dyson spheres?

Imagine you came to the lab and found a resistor with color code Blue, Red, Brown, Gold. What is the resistance of this resistor (with uncertainty). (HINT: Uncertainties should have only one significant digit and should always be rounded up)

How much would it cost to cover the entire land area of United States with dollar bills? To answer this question, you may find the following information useful: The contiguous United States (all of the states minus Alaska and Hawaii) can be

An air mass that forms over Arizona and New Mexico will be?