By Benjamin Crowell
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Self-check A Suppose the you point the hose straight up, so that the water is rising rather than falling. What happens as the velocity gets smaller? What happens when the velocity becomes zero? Answer, p. 849 f / Example 1. 56 Chapter 1 Conservation of Mass How can we apply a conservation law, such as conservation of mass, in a situation where mass might be stored up somewhere? To use a crime analogy again, a prison could contain a certain number of prisoners, who are not allowed to flow in or out at will.
3. The energy spreads out from the epicenter as a wave, and for the sake of this problem we’ll assume we’re dealing with seismic waves that spread out in three dimensions, so that we can visualize them as hemispheres spreading 50 Chapter 0 Introduction and Review out under the surface of the earth. 6-magnitude earthquake produce the same amount of vibration where I live, compare the distances from my house to the two epicenters. Solution, p. 858 34 In Europe, a piece of paper of the standard size, called A4, is a little narrower and taller than its American counterpart.
That of San Francisco is about 6000 people/km2 . How many times farther away is the average person’s nearest neighbor in LA than in √ San Francisco? 5. 25 A hunting dog’s nose has about 10 square inches of active surface. How is this possible, since the dog’s nose is only about 1 in × 1 in × 1 in = 1 in3 ? After all, 10 is greater than 1, so how can it fit? 26 Estimate the number of blades of grass on a football field. 27 In a computer memory chip, each bit of information (a 0 or a 1) is stored in a single tiny circuit etched onto the surface of a silicon chip.