This is a cylindrically shaped attachment on the revolving nose piece of a compound light microscope near the specimen

what is the word to this definition?

The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m^2 . the wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. how much total electromagnetic energy falls on the area during 1.0 minute?

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

Earth's atmosphere is composed of mostly two gases. name the two gases that make up the majority of the atmosphere and use the pie chart to tell the percentages of each.