When dynamite explodes, it releases a large amount of light and heat. this is an example of
slow combustion
rapid combustion
an exothermic reaction
an endothermic reaction
a chemical change
a physical change

Ted and emily played a mixed doubles tennis match against jack and brenda. in the second match. ted and brenda played against jack and emily. which type of chemical reaction does the situation demonstrate?

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3