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A girl weighs 380-n and walks down a flight of stairs she is 2.5 m below her starting level.what is the change in th egirls gravitional potentional energy? What slows the transfer of energy from a warmer object to a cooler object? What is the momentum of a 200 g object is falling on earth and is timed for 5 seconds? What makes the blades in the turbine go round? At what height above the earths surface would the value of acceleration due to gravity half of what it is on the surface of the earth? When a lever is used the load moves through the blank? What is the official size and weight of a t-ball? What is the comparison between the size of the visible light spectrum and the size of the electromagnetic spectrum? A nickel weighs about 5 what? How did the brownian motion help develop a theory about heat and temperature? How is position defined in two directions? What materials cause light refraction? What is the maintenance of body position in response to sudden movements such as rotation acceleration and deceleration? What effect does the shape of an object have upon its density? An object 5 millimeter high is located 15 millimeter in front of a plane mirror How far from the mirror is the image located? How can I create a beautiful balloon arch for a party by tying together colorful balloons? Why do plants float on water? How much work does the weight lifter do The weight lifter applies a force of 1300 N to a dumbbell does not move? What is the purpose of physical security systems? What are the methods used for water resistivity measurement?