What is one reason why the author includes information about research done during World War
II?
A
to highlight when muons were discovered by
physicists
B
to highlight a time period when scientific
discovery slowed down
с
to explain what sparked the creation of
national labs
D
to explain why most scientific research is
focused on particle physics

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

Why does the liquid rise up through the dip tube when the valve is open