Videos
(a)
A specific example that illustrates the given conditions.
(a)
Answer to Problem 82A
Example of billiard ball.
Explanation of Solution
Given:
It is given that when a work is done on the system, there will be an increase in kinetic energy while the potential energy remains unchanged.
The system consists of the billiard ball table itself. When a billiard ball is pushed across the table, its kinetic energy changes due to the force but potential energy remains the same. As the ball changes its state from rest to motion, all the effort was done by the external force only.Hence, no change in its potential energy but kinetic energy will increase.
Conclusion:
Thus, an example of billiard ball specifies this process.
(b)
A specific example that illustrates the given conditions.
(b)
Answer to Problem 82A
An example of a cricket ball.
Explanation of Solution
Given:
It is given that no work is done on the system, but potential energy is changed to kinetic energy.
When a cricket ball gets hit by the bat, the potential energy is changed into the kinetic energy of the ball. System consists of ball and Earth and thisindicates that there is no work done on the system. Hence, there is change in potential energy but no work is done on the system.
Conclusion:
Thus, an example of cricket ball specifies this process.
(c)
A specific example that illustrates the given conditions.
(c)
Answer to Problem 82A
An example of a pull-back toy car.
Explanation of Solution
Given:
It is given that when a work is done on the system, there will be an increase in potential energy while the kinetic energy remains unchanged.
Consider an example of pull-back toy car. Ifthe toy car is pulled back, it will move in the forward direction with the increasing speed. This is because,an internal coil spring is winded up by engaging the internal clockwork motor.So, the energy stored during pullback will be released which results in the forward motion of the toy car.
Conclusion:
Thus, an example of a pullback toy car specifies this process.
(d)
A specific example that illustrates the given conditions.
(d)
Answer to Problem 82A
An example of a speeding car on a road.
Explanation of Solution
Given:
It is given that work is done by the system. There is a decrease in kinetic energy while the potential energy remains unchanged.
Consider a car that initially speeds up on a road but after sometime, it reduces its speed by applying brakes. In this situation, the potential energy is unchanged. Since the car reduces its speed, so the kinetic energy will be decreased.Hence, work is done by the system.
Conclusion:
Thus, an example of a speeding car specifies this process.
Chapter 11 Solutions
Glencoe Physics: Principles and Problems, Student Edition
Additional Science Textbook Solutions
Biological Science (6th Edition)
Chemistry & Chemical Reactivity
Human Anatomy & Physiology (2nd Edition)
Campbell Biology (11th Edition)
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Campbell Essential Biology (7th Edition)
- 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…arrow_forwardSECTION B Answer ONLY TWO questions in Section B [Expect to use one single-sided A4 page for each Section-B sub question.] Question B1 Consider the line element where w is a constant. ds²=-dt²+e2wt dx², a) Determine the components of the metric and of the inverse metric. [2 marks] b) Determine the Christoffel symbols. [See the Appendix of this document.] [10 marks] c) Write down the geodesic equations. [5 marks] d) Show that e2wt it is a constant of geodesic motion. [4 marks] e) Solve the geodesic equations for null geodesics. [4 marks]arrow_forwardPage 2 SECTION A Answer ALL questions in Section A [Expect to use one single-sided A4 page for each Section-A sub question.] Question A1 SPA6308 (2024) Consider Minkowski spacetime in Cartesian coordinates th = (t, x, y, z), such that ds² = dt² + dx² + dy² + dz². (a) Consider the vector with components V" = (1,-1,0,0). Determine V and V. V. (b) Consider now the coordinate system x' (u, v, y, z) such that u =t-x, v=t+x. [2 marks] Write down the line element, the metric, the Christoffel symbols and the Riemann curvature tensor in the new coordinates. [See the Appendix of this document.] [5 marks] (c) Determine V", that is, write the object in question A1.a in the coordinate system x'. Verify explicitly that V. V is invariant under the coordinate transformation. Question A2 [5 marks] Suppose that A, is a covector field, and consider the object Fv=AAμ. (a) Show explicitly that F is a tensor, that is, show that it transforms appropriately under a coordinate transformation. [5 marks] (b)…arrow_forward
- No chatgpt pls will upvote Iarrow_forwardHow would partial obstruction of an air intake port of an air-entrainment mask effect FiO2 and flow?arrow_forward14 Z In figure, a closed surface with q=b= 0.4m/ C = 0.6m if the left edge of the closed surface at position X=a, if E is non-uniform and is given by € = (3 + 2x²) ŷ N/C, calculate the (3+2x²) net electric flux leaving the closed surface.arrow_forward
- No chatgpt pls will upvotearrow_forwardsuggest a reason ultrasound cleaning is better than cleaning by hand?arrow_forwardCheckpoint 4 The figure shows four orientations of an electric di- pole in an external electric field. Rank the orienta- tions according to (a) the magnitude of the torque on the dipole and (b) the potential energy of the di- pole, greatest first. (1) (2) E (4)arrow_forward
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
University Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSON
Introduction 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 Learning
Lecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON