Concept explainers
(III) Show that the total
Want to see the full answer?
Check out a sample textbook solutionChapter 11 Solutions
Physics for Scientists & Engineers, Volume 2 (Chapters 21-35)
Additional Science Textbook Solutions
University Physics with Modern Physics (14th Edition)
Lecture- Tutorials for Introductory Astronomy
Modern Physics
University Physics Volume 1
Essential University Physics (3rd Edition)
Essential University Physics: Volume 2 (3rd Edition)
- Pulsars. When a star with a mass at least ten times that of the Sun explodes outward in a supernova, its core can be collapsed into a pulsar, which is a spinning star that emits electromagnetic radiation (radio waves or light) in two tight bears in opposite directions. If a beam sweeps across Earth during the rotation, we can detect repeated pulses of the radiation, one per revolution. (a) The first pulsar was discovered by Jocelyn Bell Burnell and Antony Hewish in 1967; its pulses are separated by 1.3373 s. What is its angular speed in revolutions per second? (b) To date, the fastest spinning pulsar has an angular speed of 716 rev/s. What is the separation of its detected pulses in milliseconds? (a) Number (b) Number Hint 1345.98 eTextbook and Media Save for Later 2510 Units Units revis ms Attempts: 1 of 5 used Submit Answerarrow_forwardHE Problem 9: Consider the sign shown in the figure, which has a mass of m= 8.2 kg. sin() cos() cotan() asin() atan() acotan() cosh() tan() IT ( acos( E sinh( tanh() cotanh() Degrees O Radians Submit Hint 7 8 9t 45 6 123 0 * - VONOMICE Part (b) What force, in newtons, is exerted by each side on the hinge? rt (a) What minimum coefficient of friction is needed between the legs and the ground to keep the sign in the position shown if the chain breaks? F Hinge TENI CHAN Chain- co ca 0.50m Uniform board (co at center) 1.10 m 1.30marrow_forwardA star of radius R = 2.3 * 108m rotates with an angular speed v = 2.4 * 10-6rad>s. Ifthis star collapses to a radius of 20.0 km, find its final angular speed. (Treat the star as if itwere a uniform sphere, and assume that no mass is lost as the star collapses.)arrow_forward
- (2) (a) Find the equation of orbit when a particle is in a central force, f(r) = -+, where k and c are positive constants. (b) State the major effect caused by the inverse cubic repulsive force. ( -State ît. Dont need mathemtiral representa Tion Pa. 251-253 k %3! a vT) = Br potential, B is a positive constant. Find the shape ofarrow_forwardIn a 2-body system, a space craft is in a circular orbit at a fixed radius B (450*10^8) around a central star of mass M (6*10^120) Determine the total energy and angular momentum of the circular orbit. (v/m = -E/m) and angular momentum (l/m) Both of these values are normalised by the mass of the spacecraft.arrow_forward176. The moment of the force, F = 4î +53- 6k at (2,0,-3), about the point (2,-2,-2), is given by (1) –8î – 43 – 78 (2) –7î – 43 – 8Å (3) –7î - 83-4k (4) –4î – 3– 8Âarrow_forward
- 1 ) James wants to use a dsill, He needs to Know if it Spins fast 1.2 x 10" 쁜 to 3.72 x104 enough, He sees that one is advertised for rad to 3.72 x 104 rad through an ang le of 2.7x10" rad. is the angular accelesa tion B) What is the time it takes flsas to go from 2.00 x104 rad to 8.53 x104 rad ?arrow_forwardTwo masses interact under an attractive conservative central force. The total energy is given by 12 +U(r), 2µr2 1 .2 E ur + where l is the angular momentum. Assume that the potential energy has the form U (r) = k r". (a) Find the values of n for which stable circular orbits exist.arrow_forward1. The total linear moment um is (a) conserved (b) non-conserved (c) impose (d) non-impose 2. The generalized moment um is ƏL (а) р; — (b) р; — тӑ, (c) Pj = mq; ƏL (d) р; — 3. For hyperbolic orbit the values of energy E and eccentricity ɛ are (a) E = 0 and ɛ > 1(b) E > 0 and ɛ > 1(c) E > 0 and ɛ = 1(d) E > 0 and e = 0 4. The latitude of a place where the plane of vibration of a pendulum rotat es once a day is (а) 90° (b) 60° (c) 45° (d) 30° 5. The Lagrange's equations of motion for a sy stem is equivalent to. of motion. .equat ions (a) Newt on's (b) Laplace (c) Poisson (d) Maxwell's 6. In a cycloe the wind whirls in the sense in the nort hern hemisphere (a) upwards (b) downwards (c) clockwise (d) anticlockwise 7. The n-dimensional space is called space (a) solar (b) configuration (с) real (d) zero Mathematics An alytical Mechanics (Math-363) Page 2 of 2 8. Generalized coordinates (a) Depends on each other (b) Independent on each ot her (c) necessarily spherical coordinat es (d) May be…arrow_forward
- 6. A uniform circular disc of mass m and radius 2a . centre O, is smoothly pivoted at a point A, where OA=a. (i) Find the moment of inertia of the disc about an avis through A perpendicular to the plane of the disc. The disc is free to rotate in a vertical plane about the axis through A. Given that the disc is held with O directly above A and then slightly displaced so that it swings in a vertical plane, (ii) show that in the ensuing motion, de 3a dt = 29(1 – cos0), %3D where o is the angle AO makes with the upward vertical.arrow_forward1. A satellite is spinning at 6 rev/s. The satellite consists of a main body in the shape of a sphere of radius 3 m and a mass of 300 kg, and two antennas projecting out from the surface of the main body that can be approximated with rods of length 4 m each and mass 10 kg. The antennas lie in the plane of rotation. See the figure below. M, L Ms R M₁L Things to think about: 1. The system is made of one sphere and two rods attached to the surface of the sphere. The total moment of inertia of the system is the sum of individual moments of inertia. 2. The axis of rotation for the system is about the center of the sphere. How can you calculate the moment of inetia of the rods about this axis? How far are the center of mass of the rods away from the axis of rotation? 3. What is the moment of inertia of a rod about an axis through the center of the rod? (a) Calculate the total moment of intertia of the system about an axis passing through the center of the sphere. Itotal kg m² (b) What is the…arrow_forwardConsider a double pendulum consists of two-point masses m which are connected by strings of length / as shown in the figure below. Determine canonical momenta associated with the coordinates a and 0,. Answer Choices: P, = 2ml'è +mfè̟cos(e - e,) Pa = mFè, +ml*0, cos(e, -e,) P, = 2ml'ė, + mi è cos(e -6.) a. b. Pa = mFe, + ml*è, cos(e, -e,) Pa = ml'è, + mt è̟ cos(e - e.) C. P = ml'6, + ml*6 cos (e -e,) Pa = mfà +ml è̟ cos(4 - e.) d. P. = 2ml*0, + mľ²0, cos( e - e,)arrow_forward
- Modern PhysicsPhysicsISBN:9781111794378Author:Raymond A. Serway, Clement J. Moses, Curt A. MoyerPublisher:Cengage LearningClassical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage Learning