An astronaut is free-floating in space near a space station and it is not tethered to anything. he has some tools and a fire extinguisher. which action would propel the astronaut back toward the space station? select all that apply. a. he could throw a tool in the opposite direction of the space station. b. he could throw a tool at the space station c. he could roll toward the space station d. he could spray the fire extinguisher in the opposite direction of the space station select all that are correct there might be more than one answer

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.