Physic 265 Test 3 Name 11 (Bonus 5 points) Legal question. In the state of California is it legal for a man to marry his widow's sister? (You need a bit more than a simple Yes or No) Copyright @ B. Grevemeyer 2022 Page 10 of 11 Revised 2022 AprilPhysic 265 Test 3 Name 6 (15 points) A sewage starts at a depth of 8 meters, and angles up to a depth of 3 meters. The pipe also changes size as it does so. It gradually necks down from a cross section of 0.50 meters to 0.25 meters. The density of this sewage is the same as water 1000kg/m" The velocity in the large part of the pipe is 3 meters/sec. The initial pressure (on the large pipe) is 150000 Pa (150 KPa = 21.5 psi) a What happens to the speed of the sewage. b What happens to the pressure. Copyright Of. Grevemeyer 2022 Page 4 of 11 Revised 2012 AprlPhysic 265 Test 3 Name Bonus (25 points) You are an engineer. You have been traveling through the universe, both in time and space in the Doctor Who in his Tardis. You happened to be wandering around in ancient Greece when the Doctor heard the cloister bell ring, signaling an emergency. You weren't able to reach the Tardis in time and the Doctor had to take off without you to save the universe. (It was the Daleks again.) While you wait for the Doctor to return you have been asked to solve an important question regarding density. Unfortunately the Doctor has taken all of his technology with him. The problem You have been given two objects. They are both an irregular lumpy shape with lots of fiddly bits sticking out. Both objects are hard and approximately a kilogram of mass. Although they are different masses. What you have to find a You must find the ratio of mass of object of to object / , but you do not need to find the actual masses. Besides, telling us the mass in the units of measurement of ancient Greece, Talent, Mna, Stater Drachma and Obol would not be of much use to us. b You must also determine which of two materials is the densest. There is a slight problem. Not only must solve your task with the technology available in 300 BCE, but the has been a terrible earthquake in the area and all the cups, bowls, buckets, and containers of all kinds as well as all weighing scales and their weighs have been destroyed. But hey, you're an engineer! Easy peasy! " It probably should have been 4 & B instead of c and f, but remember you are in ancient Greece, Copyright O B. Grevemeyer 2023 Pape S of 11 Revised 2022 ApriPhysic 265 Test 3 Name 11 (10 points) You a speaker putting out 7.5 watts of sound power. It is omni-directional. a What the Intensity at 2 meters. b What is the Decibel level at 2 meters. Repeat both for a distance of 8 meters. Copyright O B. Grevemeyer 2022 Pape 7 of 11 Revised 2071 AprlTest 3 Name Physic 265 1 (5 points) What is the difference between G, and g 2 (10 points) You have a hole bored to the very center of the earth, (ignore the part about the core being molten iron and is very hot and the problems not being crushed by the enormous pressure), describe how acceleration of gravity g changes as start at the bottom of the hole at the very center of the earth, and move upwards to a point several earth diameters away. Calculate the acceleration due to gravity a At the center b Halfway to the surface c At the surface. d At 1 earth radii above the surface of the earth e At 3 earth radii above the surface of the earth Hint, be sure you are straight on the difference between altitude (distance above the Earth and radius, (the distance from the center of the Earth) Copyright O B. Grevemeyer 2012 Page 2 of 11 Revand 2032 ApilTest 3 Name Physic 265 3 (5 points) Why do we not see tides in the Great lakes, like we see in the Ocean? 4 (10 points) A communications satellite is remains almost stationary approximately over Bogota, Columbia. It is more or less motionless relative to the city. What is it altitude above sea level? The radius of the earth is 6,378,100 meters Hint, be sure you are straight on the difference between altitude (distance above the Earth and radius, (the distance from the center of the Earth) 5 (10 points) You and that hot young person that you have been thinking about, are sitting on a couch, looking deeply into each other eyes. You have a mass of 80 kg while your friend has a mass of 60 Kg. a You are about 1 meter apart. What is the actual force between you. b What happens if you move in to only 0.5 meters apart. Copyright O B. Grevemeyer 2022 Pape Jof 11 Revised 2023 AprlPhysic 265 Test 3 Name 7 (5 points) You take a deep breath and dive to the bottom of a swing pool used for Olympic diving. The depth is 5 meters. Air pressure 1.01 10 Pa Density of water is 997 kg/m a What is the pressure. 8 (5 points) The string is 8 meters long and the weight of 8 meters of string is 3 kg. Attached to the string is a 100 kg weight. The string is shaken from side to side. At what sped does the waveform propagate up the string. Copyright C B. Grevemeyer 2012 Page S of It Revised 2012 ApilPhysic 265 Test 3 Name 9 (10 points) Here is a sign wave. It in water and it's moving to the right Draw on the wave, a the wave length, and b the amplitude. Mark the c crest and the d trough. e Write the equation for the wave number. 10 (10 points) Here is a sign wave. Show, a the period and b the amplitude. c Write the equation for the frequency as function period. Copyright O B. Gurevomeyer 2023 Page 6 of 11 Revised 2022 ApriPhysic 265 Test 3 Name 12 Bonus (5 points) The letters OTTFFS SE What comes next? Bonus (5 points) 13 A group of rich Mongolian tourists board a Swiss Air charter in Moscow for a flight to Barcelona in Spain. Somewhere over Poland, the plane suffers a complete communication and navigational failure. After running out of fuel, they crash, on the German / French border. The plane breaks apart, with the main part of the plane coming to rest in Germany while the Cockpit and first class section end up across the border in France. Under the current International Civil Aviation Organization (ICAO) rules, where will the survivor be buried? Copyright O B. Grevemeyer 2027 Page 11 of It Revised 2022 AprilPhysic 265 Test 3 Name What you have to measure with First You have available to you a stick. This is a straight stick of uniform cross section. It is marked with notches at regular (equal) intervals. (Imagine something like a meter stick, but meters have not yet been invented). It is strong enough for whatever you need, it is long enough for whatever you need, and it is divided up into as many divisions as needed. Second You have a supply of string. The string is very thin, but very strong. (It's as strong as you need it to be.) Oh yes, before you came to visit 300 BCE you were a Boy Scout and you earned your knot tying and lashing merit badge. Oh, and you do have something to cut the string with. Third You have a pool of still water. (Yes, the earthquake is over and it's has stopped shaking). Page 9 of 1 1 Revised 2022 April Copyright O B. Grevemeyer 2022