You've just responded to a train derailment with a fire. An unidentified number of tank cars carrying hazardous materials are reportedly involved in the incident. Initial air monitoring near the derailment using a PID and colorimetric detector tubes has confirmed the presence of organic and inorganic products of combustion and acid gases in relatively high concentrations. The Incident Commander wants the HazMat response team to conduct additional monitoring downwind of the site. Based on this information, the type of respiratory protection that should be used by the air monitoring team is

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.

How does a hydroelectric power plant converts energy into energy.