A peice of wire of lenght l and area of cross section A has a resistance R. Another peice of wire of the same material and the same length but twice the area of cross section is connected end to end with previous wire. The effective resistance is?

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

An object starts from rest at point f and speeds up continuously as it moves around an oval. a. choose a point about 1/8 th of the way around the oval from point f, and label it point g. draw a vector to represent the velocity of the object at point g. b. determine the change in velocity vector   between points f and g.