Conceptual Physical Science (6th Edition)
Conceptual Physical Science (6th Edition)
6th Edition
ISBN: 9780134060491
Author: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt
Publisher: PEARSON
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Chapter 9, Problem 22RCQ

What are the basic differences and similarities between a generator and an electric motor?

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ROTATIONAL DYNAMICS Question 01 A solid circular cylinder and a solid spherical ball of the same mass and radius are rolling together down the same inclined. Calculate the ratio of their kinetic energy. Assume pure rolling motion Question 02 A sphere and cylinder of the same mass and radius start from ret at the same point and more down the same plane inclined at 30° to the horizontal Which body gets the bottom first and what is its acceleration b) What angle of inclination of the plane is needed to give the slower body the same acceleration Question 03 i) Define the angular velocity of a rotating body and give its SI unit A car wheel has its angular velocity changing from 2rads to 30 rads seconds. If the radius of the wheel is 400mm. calculate ii) The angular acceleration iii) The tangential linear acceleration of a point on the rim of the wheel Question 04 in 20
Question B3 Consider the following FLRW spacetime: t2 ds² = -dt² + (dx² + dy²+ dz²), t2 where t is a constant. a) State whether this universe is spatially open, closed or flat. [2 marks] b) Determine the Hubble factor H(t), and represent it in a (roughly drawn) plot as a function of time t, starting at t = 0. [3 marks] c) Taking galaxy A to be located at (x, y, z) = (0,0,0), determine the proper distance to galaxy B located at (x, y, z) = (L, 0, 0). Determine the recessional velocity of galaxy B with respect to galaxy A. d) The Friedmann equations are 2 k 8πG а 4πG + a² (p+3p). 3 a 3 [5 marks] Use these equations to determine the energy density p(t) and the pressure p(t) for the FLRW spacetime specified at the top of the page. [5 marks] e) Given the result of question B3.d, state whether the FLRW universe in question is (i) radiation-dominated, (ii) matter-dominated, (iii) cosmological-constant-dominated, or (iv) none of the previous. Justify your answer. f) [5 marks] A conformally…
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Chapter 9 Solutions

Conceptual Physical Science (6th Edition)

Ch. 9 - How is the strength of the magnetic field in a...Ch. 9 - In what direction relative to a magnetic field...Ch. 9 - What effect does Earths magnetic field have on the...Ch. 9 - What relative direction between a magnetic field...Ch. 9 - Prob. 15RCQCh. 9 - What is a galvanometer called when it is...Ch. 9 - Is it correct to say that an electric motor is a...Ch. 9 - What important discovery did physicists Michael...Ch. 9 - State Faradays law.Ch. 9 - What are the three ways in which voltage can be...Ch. 9 - How does the frequency of induced voltage compare...Ch. 9 - What are the basic differences and similarities...Ch. 9 - Is the current that is produced by a common...Ch. 9 - What commonly supplies the energy input to a...Ch. 9 - Is it correct to say that a generator produces...Ch. 9 - Is it correct to say that a transformer boosts...Ch. 9 - Which of these does a transformer change: voltage,...Ch. 9 - What is induced by the rapid alternation of a...Ch. 9 - What is induced by the rapid alternation of an...Ch. 9 - What important connection did Maxwell discover...Ch. 9 - PLUG AND CHUG (FORMULA FAMILIARIZATION)...Ch. 9 - PLUG AND CHUG (FORMULA FAMILIARIZATION)...Ch. 9 - A video game console requires 6 V to operate...Ch. 9 - A model electric train requires 6 V to operate....Ch. 9 - A transformer for a laptop computer converts a...Ch. 9 - Show that if the output current for the...Ch. 9 - A transformer has an input of 6 V and an output of...Ch. 9 - An ideal transformer has 50 turns in its primary...Ch. 9 - Neon signs require about 12,000 Y for their...Ch. 9 - A power of 100 kW (105W) is delivered to the other...Ch. 9 - Bar magnets are moved into the wire coils in...Ch. 9 - Each of the transformers shown below powered with...Ch. 9 - Many dry cereals are fortified with iron, which is...Ch. 9 - If you place a chunk of iron near the north pole...Ch. 9 - How do the magnetic poles of refrigerator magnets...Ch. 9 - Prob. 50ECh. 9 - What kind of force field surrounds a stationary...Ch. 9 - Prob. 52ECh. 9 - All atoms have moving electric charges. Why, they...Ch. 9 - Will either pole of a magnet attract a paper clip?...Ch. 9 - A friend tells you that aluminum lies beneath the...Ch. 9 - Magnet A has twice the magnetic field strength of...Ch. 9 - Prob. 57ECh. 9 - To make a compass point an ordinary iron nail...Ch. 9 - Nails sticking to a magnet is understandable. But...Ch. 9 - When steel naval ships are built, the location of...Ch. 9 - How do force field lines for gravitation about a...Ch. 9 - Can an electron at rest in a magnetic field be set...Ch. 9 - When a current-carrying wire is placed in a strong...Ch. 9 - Two charged particles are projected into a...Ch. 9 - In Figure 9.17, we see a magnet exerting a force...Ch. 9 - Residents of northern Canada are bombarded by more...Ch. 9 - When doing spacewalks, why do astronauts keep to...Ch. 9 - What changes in cosmic-ray intensity at Earths...Ch. 9 - Prob. 69ECh. 9 - Historically, replacing dirt roads with paved...Ch. 9 - A common pickup for on electric guitar consists of...Ch. 9 - When Tim pushes the wire between the poles of the...Ch. 9 - At the airport security area you walk through a...Ch. 9 - If your metal car moves over a wide, closed loop...Ch. 9 - Two separate but similar coils of wire are mounted...Ch. 9 - Why will more voltage be induced with the...Ch. 9 - Why is a generator armature harder to rotate when...Ch. 9 - Does a cyclist coast farther if the headlamp...Ch. 9 - How do the input and output parts of a generator...Ch. 9 - Your friend says that if you crank the shaft of a...Ch. 9 - Correct the statement that a generator produces...Ch. 9 - Discuss what is wrong with the following scheme:...Ch. 9 - What is wrong with the statement that a very...Ch. 9 - Why will a transformer not work in a dc circuit?Ch. 9 - What is the principal difference between a step-up...Ch. 9 - In what sense can a transformer be viewed as an...Ch. 9 - Can an efficient transformer step up energy?...Ch. 9 - A friend says that changing electric and magnetic...Ch. 9 - Would electromagnetic waves exist if changing...Ch. 9 - Your physics instructor drops a magnet through a...Ch. 9 - This exercise is similar to the previous one. Why...Ch. 9 - Discuss why a motor also tends to act as a...Ch. 9 - Both the English physicist Michael Faraday and the...Ch. 9 - One method for making a compass is to stick a...Ch. 9 - Your lab partner says, An electron always...Ch. 9 - In a mass spectrometer, ions are directed into a...Ch. 9 - A cyclotron is a device for accelerating charged...Ch. 9 - A beam of high-energy protons emerges from a...Ch. 9 - A magnetic field can deflect a beam of electrons,...Ch. 9 - When Fred Cauthen releases the sheet of copper,...Ch. 9 - A piece of plastic tape coated with iron oxide is...Ch. 9 - If you place a metal ring in a region where a...Ch. 9 - How could a light bulb near an electromagnet, but...Ch. 9 - Why can a hum usually be heard when a transformer...Ch. 9 - Prob. 105DQCh. 9 - A magician places an aluminum ring on a table,...Ch. 9 - Do a pair of parallel current-carrying wires exert...Ch. 9 - Choose the BEST way to complete the statement. 1....Ch. 9 - Surrounding moving electric charges are (a)...Ch. 9 - Prob. 3RATCh. 9 - A magnetic force acting on a beam of electrons can...Ch. 9 - When you move a bar magnet to and fro, first...Ch. 9 - The principle underlying the operation of an...Ch. 9 - The essential physics concept in the operation of...Ch. 9 - A transformer works in accordance with (a)...Ch. 9 - A step-up transformer in an electric circuit can...Ch. 9 - Prob. 10RAT
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What is Electromagnetic Induction? | Faraday's Laws and Lenz Law | iKen | iKen Edu | iKen App; Author: Iken Edu;https://www.youtube.com/watch?v=3HyORmBip-w;License: Standard YouTube License, CC-BY