Table of contents
- 0. Math Review(0)
- 1. Intro to Physics Units(0)
- 2. 1D Motion / Kinematics(0)
- Vectors, Scalars, & Displacement(0)
- Average Velocity(0)
- Intro to Acceleration(0)
- Position-Time Graphs & Velocity(0)
- Conceptual Problems with Position-Time Graphs(0)
- Velocity-Time Graphs & Acceleration(0)
- Calculating Displacement from Velocity-Time Graphs(0)
- Conceptual Problems with Velocity-Time Graphs(0)
- Calculating Change in Velocity from Acceleration-Time Graphs(0)
- Graphing Position, Velocity, and Acceleration Graphs(0)
- Kinematics Equations(0)
- Vertical Motion and Free Fall(0)
- Catch/Overtake Problems(0)
- 3. Vectors(0)
- Review of Vectors vs. Scalars(0)
- Introduction to Vectors(0)
- Adding Vectors Graphically(0)
- Vector Composition & Decomposition(0)
- Adding Vectors by Components(0)
- Trig Review(0)
- Unit Vectors(0)
- Introduction to Dot Product (Scalar Product)(0)
- Calculating Dot Product Using Components(0)
- Intro to Cross Product (Vector Product)(0)
- Calculating Cross Product Using Components(0)
- 4. 2D Kinematics(0)
- 5. Projectile Motion(0)
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- 8. Centripetal Forces & Gravitation(0)
- Uniform Circular Motion(0)
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- Centripetal Forces(0)
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- Force & Potential Energy(0)
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- Ballistic Pendulum(0)
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- How to Identify the Type of Collision(0)
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- More Conservation of Energy Problems(0)
- Conservation of Energy in Rolling Motion(0)
- Parallel Axis Theorem(0)
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- Moment of Inertia & Mass Distribution(0)
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- Rotational Dynamics with Two Motions(0)
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- Conservation of Angular Momentum(0)
- Angular Momentum & Newton's Second Law(0)
- Intro to Angular Collisions(0)
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- Angular Collisions with Linear Motion(0)
- Intro to Angular Momentum(0)
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- 17. Periodic Motion(0)
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- Latent Heat & Phase Changes(0)
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- Advanced Calorimetry: Equilibrium Temperature with Phase Changes(0)
- Phase Diagrams, Triple Points and Critical Points(0)
- Heat Transfer(0)
- 21. Kinetic Theory of Ideal Gases(0)
- 22. The First Law of Thermodynamics(0)
- 23. The Second Law of Thermodynamics(0)
- 24. Electric Force & Field; Gauss' Law(0)
- 25. Electric Potential(0)
- 26. Capacitors & Dielectrics(0)
- 27. Resistors & DC Circuits(0)
- 28. Magnetic Fields and Forces(0)
- 29. Sources of Magnetic Field(0)
- Magnetic Field Produced by Moving Charges(0)
- Magnetic Field Produced by Straight Currents(0)
- Magnetic Force Between Parallel Currents(0)
- Magnetic Force Between Two Moving Charges(0)
- Magnetic Field Produced by Loops and Solenoids(0)
- Toroidal Solenoids aka Toroids(0)
- Biot-Savart Law (Calculus)(0)
- Ampere's Law (Calculus)(0)
- 30. Induction and Inductance(0)
- 31. Alternating Current(0)
- Alternating Voltages and Currents(0)
- RMS Current and Voltage(0)
- Phasors(0)
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- Phasors for Resistors(0)
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- 32. Electromagnetic Waves(0)
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8. Centripetal Forces & Gravitation
Kepler's Third Law
8. Centripetal Forces & Gravitation
Kepler's Third Law: Study with Video Lessons, Practice Problems & Examples
Back to all problems
17PRACTICE PROBLEM
White dwarfs form when stars like our Sun exhaust their nuclear fuel and shed their outer layers, leaving behind a dense core. According to Newton's third law, the force that expels the outer layers also applies an equal and opposite force inward, causing the core to compress. In some cases, the core becomes extremely dense, forming a white dwarf. These stars can rotate rapidly due to the conservation of angular momentum. Consider a white dwarf with a mass equal to the Sun and a radius of 5.0 × 103 km. How many revolutions per minute(rpm) would a satellite make if it were orbiting 5.0 × 102 km above the surface?[Mass of sun = 2.0 × 1030 kg]
White dwarfs form when stars like our Sun exhaust their nuclear fuel and shed their outer layers, leaving behind a dense core. According to Newton's third law, the force that expels the outer layers also applies an equal and opposite force inward, causing the core to compress. In some cases, the core becomes extremely dense, forming a white dwarf. These stars can rotate rapidly due to the conservation of angular momentum. Consider a white dwarf with a mass equal to the Sun and a radius of 5.0 × 103 km. How many revolutions per minute(rpm) would a satellite make if it were orbiting 5.0 × 102 km above the surface?[Mass of sun = 2.0 × 1030 kg]