How would this reaction energy diagram be different if a catalyst were used in the reaction?
A. The activation energy would be lower
B. The final energy of the products would be lower
C. The final energy of the products would be higher
D. The activation energy would be higher

On a cold day, when the air temperature is 0°c, you empty your lungs and take a deep breath, filling your lungs with 4.2 l of air. if you hold your breath until the temperature of the air in your lungs reaches 37°c, what is the volume of the air in your lungs at that point, assuming the pressure does not change?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Matter that emits no light at any wavelength is called