What kind of chemical/gas/radiation that is invisible can be sprayed by some kind of mechanism making anything that it gets on spoil, change smell of things making it smell stronger & pugnet, or when it hits human body or anything ingested that this chemical/gas/radiation got sprayed or on somehow that would make your heart beat heavy & fast?

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth