A. Extend one of visors of the Water level
observation device and place it on the wave
produced by a single source. What part of the
wave do the dark lines represent? What part of
the wave do the light lines represent?
cewbor

Ineed with these last two questions: 1) what are two types of cold air masses that influence the weather in north america? name them and describe their humidity. 2) describe the motion of a cold air mass and a warm air mass and the weather you would expect at a warm front and an occluded front.

Alarge box of mass m is pulled across a horizontal frictionless surface by a horizontal rope with tension t. a small box of mass m sits on top of the large box. the coefficients of static and

Identify some abiotic characteristics of the tundra biome.