One day you measure a Sequoia tree to have some height d. After some time 7, you return to measure the same tree but find that it is now too tall to accurately measure. However, you notice that when the sun is 30° above the horizon a shadow with length 5d is cast onto the ground. (a) What is the height of the tree at the later time 7? (b) Find an expression for the average speed of tree growth over the time 7. (c) If T = 5 years and d = 6 ft, what is the average speed in miles per hour? At time T 30° 5d

One day you measure a Sequoia tree to have some height d. After some time 7, you return to measure the same tree but find that it is now too tall to accurately measure. However, you notice that when the sun is 30° above the horizon a shadow with length 5d is cast onto the ground. (a) What is the height of the tree at the later time 7? (b) Find an expression for the average speed of tree growth over the time 7. (c) If T = 5 years and d = 6 ft, what is the average speed in miles per hour? At time T 30° 5d

Name: Problem 3 Growing SequoiaOne day you measure a Sequoia tree to have s
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Description: Problem 3 Growing SequoiaOne day you measure a Sequoia tree to have some height d. After some time T, you return to measurethe same tree but find that it is now too tall to accurately measure. However, you notice that when thesun is 30° above the ho

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Introduction

Section: Chapter Questions

Problem 50P

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3. A baseball is thrown upward from the top of Otto Hahn (which is 7 floors high) with an initial speed of 18 ft/s. Mr. Nakset who is on the 7 floor sees it pass by as it falls to the ground. If one floor is ten feet high and the eye level of Mr. Nakset is 5 feet from the floor, how many seconds have passed from when it was released to when Mr. Nakset saw it?
The great astronomer Edwin Hubble discovered that all distant galaxies are receding from our Milky Way Galaxy with velocities proportional to their distances. It appears to an observer on the Earth that we are at the center of an expanding universe. Figure 3.64 illustrates this for five galaxies lying along a straight line, with the Milky Way Galaxy at the center. Using the data from the figure, calculate the velocities: (a) relative to galaxy 2 and (b) relative to galaxy 5. The results mean that observers on all galaxies will see themselves at the center of the expanding universe, and they would likely be aware of relative velocities, concluding that it is not possible to locate the center of expansion with the given information. Figure 3.64 Five galaxies on a straight line, showing their distances and velocities relative to the Milky Way (MW) Galaxy. The distances are in millions of light years (Mly), where a light year is the distance light travels in one year. The velocities are nearly proportional to the distances. The sizes of the galaxies are greatly exaggerated; an average galaxy is about 0.1 MlY across.
You stand in a flat meadow and observe two cows (Fig. P1.73). Cow A is due north of you and 15.0 m from your position. Clow B is 25.0111 from your position. From your point of view, the angle between cow A and cow H is 20.0, with cow B appearing to the right of cow A. (a) How far apart are cow A and cow B? (b) Consider the view seen by cow A. According to this cow, what is the angle between you and cow B? (c) Consider the view seen by cow B. According to this cow, what is the angle between you and cow A? Hint: What does the situation look like to a hummingbird hovering above the meadow? (d) Two stars in the sky appear to be 20.0 apart. Star A is 15.0 ly from the Earth, and star B. appearing to the right of star A. is 25.0 ly from the Earth. To an inhabitant of a planet orbiting star A. what is the angle in the sky between star B and our Sun? Figure P1.73 Your view of two cows in a meadow. Cow A U due north of you. You must rotate your eyes through an angle of 20.0 to look from cow A to cow B.
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I cannot get this second part right. I have tried several things, but I keep getting it wrong. Please and thank you!