A wave in which particles of the medium move at right angles to the direction of the wave is called a a. standing wave
b. longitudinal wave
c. reflected wave
d. transverse wave

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.

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied.

If steel is more dense that lake water, why can a boat float