Linus claims that the added gravitational force of neutrons holds the particles in a nucleus together. Linnea says that they stick together because they lose their electric charge when they form a nucleus. Which one, if either, is correct, and why?
a. Linus, because more particles exert gravitational forces on one another than exert electromagnetic forces.
b. Linus, because the numerical magnitude of G/ke is 7.42 × 10^?21.
c. Linnea, because the numerical magnitude of G/ke is 7.42 × 10^?21.
d. Both, because electric charge is lost and then gravity holds the nucleus together.
e. Neither, because gravity is not lost, and the numerical magnitude of ke/G is 1.35 × 10^20.
e
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A continuous change in position is called ______________
Fill in the blank(s) with correct word
What is h?
What will be an ideal response?
You are the science officer on a visit to a distant solar system. Prior to landing on a planet you measure its diameter to be 1.8 × 107 m and its rotation period to be 22.3 hours
You have previously determined that the planet orbits 1.8 × 1011 m from its star with a period of 402 earth days. Once on the surface you find that the acceleration due to gravity is 59.7 m/s2. What are the mass of (a) the planet and (b) the star? (G = 6.67 × 10-11 N ? m2/kg2.) A) (a) 7.2 kg × kg, (b) 2.9 kg × kg B) (a) 1.3 kg × kg, (b) 2.9 kg × kg C) (a) 7.2 kg × kg, (b) 1.7 kg × kg D) (a) 1.3 kg × kg, (b) 1.7 kg × kg
For a satellite in orbit around Earth, the product of its speed times the distance from the center of Earth has the same value when the satellite is at the perigee, its closest approach to Earth, and at the apogee, its furthest point from Earth
Is the product the same at other points on the orbit? Why?