physics questions: (format may be messed up) QUESTION 1: 1.1) if two objects are separated by a distance D and the second object is twice the mass of the other what can you say about the magnitude of the forces (same different, ..., explain)? 1.2) If the distance between the two objects is halved what happens to the force? 1.3) If the distance between the two objects is tripled what happens to the force? 1.4) If the mass of one object is doubled and the distance is reduced by a factor of 4 what can you say about the force? QUESTION 2: 2) Section 6.6 discusses Kepler's laws. Explain Kepler's laws and redo the derivation for Kepler's law for a circular orbit. For which satellites is r3/ a constant (see table in section 6.6)? QUESTION 3: Tides The moon exerts a gravitational force on the Earth. However, that force is not uniform across the Earth. The side of the Earth that is closer to the moon feels a stronger force, after all the force of gravity does depend on distance. This causes tides. Watch this video: On youtube titled "Tides: crash course astronomy #8" by crash course. 3.1 Explain how the tidal force works. 3.2 How does the Earth's rotation affect the tides? 3.3 What is tidal locking? 3.4 How does the Earth's orbit around the Sun affect the tides? 3.5 How much does the solid Earth stretch, due to tides? 3.6 Why is the moon receding away from the Earth? 3.7 Why is the Earth's rotation slowing? 3.8 Compared to the Moon, how strong is the Sun's tidal force? 3.9 What is the proxigen tide? QUESTION 4: watch this video: on youtube title "The Tidal Heating of lo" by UNL Astronomy Tides and energy transfer 4.1 What is the equation for differential gravity and explain that equation. 4.2 Considering an elliptical orbit, when is the tidal force stronger, when the satellite is closer or father away from the star or planet? 4.3 Discuss the examples in the video that explained the transfer of kinetic energy to thermal energy? Which demo is most like what happens in tidal heating? 4.4 What is orbital resonance