Carmen conducted an experiment to determine if listening to different types of music would affect a person’s pulse. her hypothesis was that pulse rate would change with different types of music. each person listened to seven different selections of music for 30 seconds each. each person’s pulse was taken before the music and then after each 30-second interval of music. the pulses were taken again after the music selections were completed. based on her experiment, carmen concluded that a person’s pulse rate changed when the person listened to different types of music. what might be something carmen should keep constant in her experiment?

answer; /// i believe that the correct answer is ; /// renaissance,printing press, age of exploration and protestant reformation;

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it brings together the military and civilian sectors of society to harness the total power of the nation. it is the mechanism that facilitates the successful prosecution of any conflict.it brings together the military and civilian sectors of society to harness the total power of the nation. it is the mechanism that facilitates the successful prosecution of any conflict.

this headline suggests that midterm congressional   elections are at the corner and trump administration wants to activate his base by vowing to clamp down on immigrants and immigration as trump had said during his election campaign around two years ago. when a baby is born in usa, the baby becomes citizen of usa for 85 years and trump wants to end this rule of birthright citizenship to control illegal immigration and this what he said in an interview""we’re the only country in the world where a person comes in and has a baby, and the baby is essentially a citizen of the united states for 85 years, with all of those benefits,” "