The age of the universe is thought to be about 14 billion years. Assuming two significant figures, write this is powers of ten in (a) years (b) seconds.

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Why do physicists use models?

If temperature is held constant for an ideal gas, as P and V change for a given gas sample, the PV products will be constant. a. True b. False

How long is one day on earth

An object has a mass of 1kg on Earth. What is its weight on the moon?

Which of the following terms are needed to completely describe speed? Check all that apply. A. Units B. Direction C. Number D. Mass

Drivers are able to see objects ahead of them because light travels through windshields.

How are trade winds affected by the coriolis effect

When a raw egg gets heated into an edible egg is this considered a physical or chemical change?

Starting at its rightmost position, it takes 2 seconds for the pendulum of a grandfather clock to swing a horizontal distance of 18 inches from right to left and 2 seconds for the pendulum to swing back from left to right.