Suppose you had a lucky day finding a piece of comet debris when you went to a-li mountain for relaxing. since you have no clue what this piece of debris is made of, what will you do to find out the physical properties of this piece of material regarding to its surface? let's assume that you are having all the tools in the world to do this job.

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.