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Section 11: Multiplying numbers in scientific notation 1. There are many estimates of the number of stars in the universe. One 4 estimate is that...

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Section 11: Multiplying numbers in scientific notation 1.11. 4 There are many estimates of the number of stars in the universe. One estimate is that there are 10 10 stars in the Milky Way galaxy, and that there are 10 10 galaxies in the universe. Assuming that the number of stars in the Milky Way is the average number of stars in a galaxy, estimate how many stars there are in the universe. It perhaps goes without saying: Express your answer in scientific notation. __________________ 1.17. 5 A hapless motorist is trying to find his friend's house, which is located 1.50 miles west of the intersection of State Street and First Avenue. He sets out from the intersection, and drives the same number of kilometers due south instead. How far in kilometers is he from his intended destination?                             _____________________Km 2.18. 6 Two spacecraft are 13,500 m apart and moving directly toward each other. The first spacecraft has velocity 525 m/s and accelerates at a constant −15.5 m/s 2 . They want to dock, which means they have to arrive at the same position at the same time with zero velocity. (a) What should the initial velocity of the second spacecraft be?                           ________________________ m/s 2.23. 11 A person throws a ball straight up. He releases the ball at a height of 1.75 m above the ground and with a velocity of 12.0 m/s. Ignore the effects of air resistance. (b) How high above the ground does the ball go?                           __________________________ m 3.C. 2 Compare these two vectors: (5, 185°) and the negative of (5, 5°). Are they the same vector? Why or why not? EXPLAIN:
Section 0: Introduction 3.0.1 Use the simulation in the interactive problem in Section 3.0 to answer the following questions. Assume that the simulation is reset before each part and give each answer in the form ( x , y ). (a) What is the displacement to Ed's Fuel Depot? (b) What is the displacement to Joe's Diner? (c) What is the displacement to Silver's Gym? (a) _______________________ km, _________________________ km (b) _______________________ km, _________________________ km (c) _______________________ km, __________________________km  Section 1: Scalars 3.1.1 The Earth has a mass of 5.97×10 24 kg. The Earth's Moon has a mass of 7.35×10 22 kg. How many Moons would it take to have the same mass as the Earth?              _____________________________ 3.5.2 The Moon's orbit around the Earth is nearly circular, with an average radius of 3.8×10 5 kilometers from the Earth's center. It takes about 28 days for the Moon to complete one revolution around the Earth. (c) What is the sum of the four displacement vectors you drew in part "b"? _______________________ 3.11.4
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Section 11: Multiplying numbers in scientific notation
1.11. There are many estimates of the number of stars in the universe. One
4
estimate is that there are 1010 stars in the Milky Way galaxy,...

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