My science fair project problem statement is: "how many pennies in a stack will shine a flashlight for the longest amount of time? "

my hypothesis is "if a stack of two pennies is connected with an argentium wire to a light source’s circuit, then it will produce light."

with this experiment, what could be my controlled and constant variables?

Which statement best describes a literary analysis? a literary analysis combines the writer's own opinions about a text with evidence from the text. a literary analysis contains only facts from a text and should not contain opinions. a literary analysis requires research from many sources of information to support an argument a literary analysis summarizes a text and makes a recommendation for others to read it.

Most of the workers who laid the central pacific railroad were?

What was the greatest contribution of the “scientific method”?