The united states rallied to the aid of cuba in 1898 mainly because it had a need for revenge against spain wanted to protect its own interests had a military base to protect wanted others to know freedom

In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

Identify the electromagnets with poles that are reversed from the electromagnet shown above

What is the source of continuous heat and energy that we receive from the sun