Select the correct answer. In 2014, the ALS ice bucket challenge swept through social media. People posted videos of themselves dumping buckets of ice cold water on
their heads to raise awareness and funds for ALS, a disease that affects nerve cells in the brain and spinal cord. The stunt became an idea that
swept through mainstream America and was influenced by the media. Which term describes this scenario that historians could use to
understand this event in society?
OA propaganda
OB. pop culture
OC. historical context
OD. hypothesis
OE high culture

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.