As the of electromagnetic waves increases, so does their
a. frequency; energy
b. wavelength; energy
c. amplitude; wavelength
d. frequency; wavelength

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.

Determine the maximum r-value of the polar equation r =3+3 cos 0

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack