A proton cyclotron has a magnetic field of 0.20 T between its poles and a radius of 0.40 m. What is the maximum energy for the protons from this machine?
A. 
B. 
C. 
D. 
E. 
E.
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In the subsurface ocean beneath Europa's icy crust, if life exists, it most likely originated
A) close to volcanic vents on its ocean floor B) on the surface and then migrated down into the ocean C) just below the surface of its thin icy crust where sunlight is still able to penetrate D) via panspermia from impacts
The two most abundant elements in the sun are
a. nitrogen and oxygen. b. hydrogen and helium. c. sulfur and iron. d. carbon and hydrogen. e. carbon and nitrogen.
Almost all active galactic nuclei seem to be involved in ________ with neighbors
Fill in the blank(s) with correct word
The scientific method is most effective in
A) making hypotheses. B) gaining, organizing, and applying new knowledge. C) discovering new things. D) making theories. E) performing experiments.