Anita and nick are playing tug-of-war near a mud puddle. they are each holding on to an end of a taut rope that has a knot exactly in the middle. anita's position is 6.2 meters east of the center of the puddle and nick's position is 3.0 meters west of the center of the puddle. what is the location of the knot relative to the center of the puddle? treat east as positive and west as negative.

A33.1 g copper object is launched from a 1.5 m 30° steel incline positioned on the floor by being pulled up a string attached to a 50.0 g mass suspended vertically over a pulley. the object is projected towards a glass table where it lands when it is at the point along its trajectory with the lowest speed. it comes to a halt when it clears the opposite edge of the table. it then falls and lands on 9 physics texts each 5 cm thick that are stacked on the floor on the opposite side of the table. assume that the table does not have a ledge and the rectangular object experiences 0.05 n of air resistance as it falls towards the books. how far and how long did the object travel and how fast does it hit the books. assume that at the moment the copper object leaves the incline, the massless string and ideal pulley break off

What is the role of lenses in microscopy?

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created