Which of the following is true about rocks?
a. rocks are composed of only one mineral.
b. rocks do not contain any nonmineral matter.
c. coal is not considered a true rock.
d. most rocks are a mixture of minerals.

Which governments provide garbage collection services to homes and businesses

Contains chemical energy. a. heat b. light c. natural gas

Abeam of light shining from water to air strikes the surface at an angle greater than 48 degrees and produces total internal reflection. if the incident beam is at a 50 degree angle what angle is the reflected beam 13 25 50 100