Which best describes a common relationship between air temperature and regions of high pressure and of low pressure?
a.
cool air rises, making the pressure above lower; warm air sinks, making the pressure above higher.
b.
cool air near the surface forms high pressure areas; warm air forms low pressure areas.
c.
high pressure areas warm the air around them; low pressure areas cool the air around them.
d.
dry air makes high pressure areas cooler; humid air makes low pressure areas warmer.

Calculate the frequency of a wave in a spring toy. the wave has a speed of 1.1 meters per second and a wavelength of 0.1 meters. *

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.

Categorize them by metal, nonmetal, in periodic tableductilenon-ductilemalleableoften gain electrons easilygood conductorpoor conductorcan be liquidselements