UNDERSTANDING THE UNIVERSE(LL)-W/CODE
3rd Edition
ISBN: 9780393869903
Author: PALEN
Publisher: NORTON
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Chapter 5, Problem 16QAP
To determine
The result of ice-skater when he throws arms out.
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Chapter 5 Solutions
UNDERSTANDING THE UNIVERSE(LL)-W/CODE
Ch. 5.1 - Prob. 5.1CYUCh. 5.2 - Prob. 5.2CYUCh. 5.3 - Prob. 5.3CYUCh. 5.4 - Prob. 5.4CYUCh. 5.5 - Prob. 5.5CYUCh. 5.6 - Prob. 5.6CYUCh. 5 - Prob. 1QAPCh. 5 - Prob. 2QAPCh. 5 - Prob. 3QAPCh. 5 - Prob. 4QAP
Ch. 5 - Prob. 5QAPCh. 5 - Prob. 6QAPCh. 5 - Prob. 7QAPCh. 5 - Prob. 8QAPCh. 5 - Prob. 9QAPCh. 5 - Prob. 10QAPCh. 5 - Prob. 11QAPCh. 5 - Prob. 12QAPCh. 5 - Prob. 13QAPCh. 5 - Prob. 14QAPCh. 5 - Prob. 15QAPCh. 5 - Prob. 16QAPCh. 5 - Prob. 17QAPCh. 5 - Prob. 18QAPCh. 5 - Prob. 19QAPCh. 5 - Prob. 20QAPCh. 5 - Prob. 21QAPCh. 5 - Prob. 22QAPCh. 5 - Prob. 23QAPCh. 5 - Prob. 24QAPCh. 5 - Prob. 25QAPCh. 5 - Prob. 27QAPCh. 5 - Prob. 28QAPCh. 5 - Prob. 29QAPCh. 5 - Prob. 30QAPCh. 5 - Prob. 31QAPCh. 5 - Prob. 32QAPCh. 5 - Prob. 34QAPCh. 5 - Prob. 35QAPCh. 5 - Prob. 36QAPCh. 5 - Prob. 37QAPCh. 5 - Prob. 38QAPCh. 5 - Prob. 39QAPCh. 5 - Prob. 40QAPCh. 5 - Prob. 41QAPCh. 5 - Prob. 42QAPCh. 5 - Prob. 43QAPCh. 5 - Prob. 44QAPCh. 5 - Prob. 45QAP
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- Must engineers take Earth’s rotation into account when constructing very tall buildings at any location other than the equator or very near the poles?arrow_forwardAt the end of its life, a star can collapse from the size of our Sun to the size of the Earth. The star then becomes a so-called White Dwarf. When the collapse takes place, the mass of the star stays the same. Stars generally spin around their own axis. What happens to the angular velocity of the spinning star when it collapses to become a White Dwarf ?arrow_forwardCalculate the angular momentum of the sun's spin angular momentum (assuming the sun is a uniform sphere) and the four major planets Jupiter, Saturn, Uranus and Neptune, and prove that the sun's spin angular momentum is less than 0.5% of the total angular momentum of the solar system.arrow_forward
- #40arrow_forwardAn astronaut is freely floating in space away from the space station. He has a drill. The drill is rotating, but the astronaut is not rotating. Is it possible for him to rotate about any axis that he wants? How?arrow_forwardWhy does Earth keep on spinning? What started it spinning to begin with? And how does an ice skater manage to spin faster and faster simply by pulling her arms in? Why does she not have to exert a torque to spin faster?arrow_forward
- The Earth is 93 million miles (mi) from the Sun and its period of revolution is 1 year = 31,500,000 s. What is the radial acceleration of the Earth in its orbit about the Sun? Choose 0.0093 mi/s^2 18.6 mi/s^2 0.0000037 mi/s^2 0.0000136 mi/s^2arrow_forwardA star that has the same mass and radius as the Sun rotates at an angular velocity 1.2 revolutions per month. The star collapses into a white dwarf that has a radius of 3.0 km. What is its angular velocity after the collapse?arrow_forwardAn ice skater is spinning at 6.8 rev/s and has a moment of inertia of 0.56 kg ⋅ m2. 1) Calculate the angular momentum, in kilogram meters squared per second, of the ice skater spinning at 6.8 rev/s. L1 = 2) He reduces his rate of rotation by extending his arms and increasing his moment of inertia. Find the value of his moment of inertia (in kilogram meters squared) if his rate of rotation decreases to 1.75 rev/s. I2 = 3) Suppose instead he keeps his arms in and allows friction of the ice to slow him to 3.5 rev/s. What is the magnitude of the average torque that was exerted, in N ⋅ m, if this takes 16 s? τave =arrow_forward
- What is the angular momentum of the earth? (Earth mass: 5.98E24kg; earth radius: 6.37E6m)arrow_forwardConsidering a disk is rotating on a table in a clockwise direction, what is the direction of the angular velocity? right downward upward leftarrow_forwardQ13.12 A planet (P) is moving around the sun (S) in an elliptical orbit. As the planet moves from aphelion to perihelion, the planet's angular momentum A planet P follows an elliptical orbit. The sun S is at one focus of the ellipse. Perihelion Aphelion A. increases at all times. B. decreases at all times. C. decreases during part of the motion and increases during the other part. Kea There is nothing at the other focus. D. increases, decreases, or remains the same during various parts of the motion. E. remains the same at all points between aphelion and perihelion.arrow_forward
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