A car covers a distance of 60 km in 30 minutes whereas a train covers a distance of 75 km in 1hr. Find the speed of the car and train in
km/hr. Which one has the fastest speed?

The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. because water vapor readily adsorbs onto the surface of silica gel, it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs for δg, δh, and δs for the adsorption of water.

Which of the following is a physical property flammability heat of combustion solubility and toxicity

Which method would be best to separate a mixture of sand and gravel