Frederica is sitting on a moving train. she watches the telephone poles fly past. she knows that the poles in this area are 1/4 mile apart. every minute, 5 poles pass her. in the reference frame of the poles, how fast is the train moving?
a.
2 miles/min
b.
1.3 miles/min
c.
0.80 miles/min
d.
0.50 miles/min

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 these is an intensive property of a substance

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.