Concept explainers
You are working at your university swimming center. The athletic department decides that it would like to install a flag pole of height 10.0 m at the south end of one of the outdoor pools, which lies along a north–south axis. The pool is 3.00 m deep and the flag pole is to be installed 4.00 m from the south edge of the pool, midway along the length of the south edge. (a) Your supervisor knows of your expertise in physics and asks you to determine the distance of the shadow of the tip of the flag pole on the bottom of the pool from the south wall of the pool on a summer day when the Sun appears directly south and at an angle of 65.0° above the horizon. (b) Your supervisor also asks if there is any time during the year that the flag pole will not cast a shadow along the bottom of the pool when the Sun is due south. The highest the Sun reaches in the sky at this location is 68.5° at the summer solstice.
Want to see the full answer?
Check out a sample textbook solutionChapter 34 Solutions
PHYSICS FOR SCI.AND ENGR W/WEBASSIGN
- . A high fountain of water is located at the center of a square pool. Not wishing to get his feet wet, the student walks around the pool and measures its perimeter to be 20 m. Next, the student stands at the corner of the pool and uses a protractor to gauge the angle of elevation of the top of the fountain to be 55 degrees. In inches, how high is the fountain?arrow_forwardA high fountain of water is located at the center of a circular pool. Not wishing to get his feet wet, a student walks around the pool and measures its circumference to be 32.0 m. Next, the student stands at the edge of the pool and uses a protractor to gauge the angle of elevation at the bottom of the fountain to be 55.0∘. How high is the fountain?arrow_forwardthe dimensions of an aquarium are found to be 76.70 cm, 114.50 cm, and 104.2 cm. what is the volume of the aquarium in cm^3? what is the volume in m^3?arrow_forward
- A circular hole of radius 8.467 10-1 cm must be cut into the front panel of a display unit. The tolerance is 2.0 10-3 cm, which means the hole cannot differ by more than this quantity from the desired radius. If the actual hole is larger than the desired radius by the allowed tolerance, what is the difference between the actual area and the desired area of the hole?arrow_forwardBottles of perfume sometimes have thick glass (n= 1.5) walls which give the impression the volume is larger than it really is. Assume a cylindrical bottle with an inner radius of 1.0 cm and an outer radius of 2.0 cm. What percentage of the apparent volume is the real volume? а. 95% b. 60% с. 80% d. 64% е. 75%arrow_forwardPart (a) Derive an expression for the sensor height, h, above the horizontal tank bottom as a function of L, d and O. h= B) Use logic to deduce the value, in degrees, of the angle A when the fuel tank is full. No computation is required. θfull= Part (c) Calculate the angle, in degrees, associated with a half-full fuel tank. Part (d) Note that the arm is longer than the tank is deep, I > d. What angle, in degrees, is associated with an empty fuel tank?arrow_forward
- One barn, a unit used for cross sections in nuclear and particle physics, is equal to 10-28 square meters, about the cross-sectional area of a uranium nucleus.Assuming an atom is perfectly spherical and it has a diameter of 0.386 nm, determine its cross section in barns. Express your answer in scientific notation.arrow_forwardThe Empire State building in New York City is approximately 1250 ft1250 ft tall. How many U.S. half dollars would be in a stack of the same height? Each half dollar is 2.15 mm2.15 mm thick.What is the value, in dollars, of the same stack of half dollars?arrow_forwardGrains of fine California beach sand are approximately spheres with an average radius of 70 μ m and are made of silicon dioxide. A solid cube of silicon dioxide with a volume of 1.00 m3 has a mass of 2600 kg. What mass of small sand grains would have a total surface area (the total area of all individual spheres) equal to the surface area of a cube 1.00 m on an edge?arrow_forward
- An architect is redesigning a rectangular room on the blueprints of the house. He decides to double the width of the room, increase the length by 89.0%, and increase the height by 20.0%. By what factor has the volume of the room increased?arrow_forwardA fountain of water is located at the center of a circular pool. Not wishing to get his feet wet, a student walks around the pool and measures its circumference to be 16.5 m. Next, the student stands at the edge of the pool and uses a protractor to gauge the angle of elevation at the bottom of the fountain to be 55.0°. How high is the fountain?arrow_forwardA rectangular glass container holds 32.0 mL of water. If one side is 3.60 cm and the other side is 5.0 cm, what must be the length of the third side in cm? Assume the sides of the container are extremely thin and therefore make a negligible contribution to the volume. Give your answer in the appropriate number of significant figures.arrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON