Which of the following achievements was been attributed to Isaac Newton: a. Laws of Motion. b. General Relativity. c. Quantum Mechanics. d. Geocentric Model for the Solar System.
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9,
Which of the following achievements was been attributed to Isaac Newton:
| a. |
Laws of Motion. |
|
| b. |
General Relativity. |
|
| c. |
|
|
| d. |
Geocentric Model for the Solar System. |
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- Compared to other fundamental forces in the universe, the gravitational force is A. very weak. B. stronger than some forces, but weaker than others. C. None of the above. D. very strong.19. According to Isaac Newton, the value of the constant, k, in Kepler's Third Law (P2 = ka3) is dependent on which one of the following quantities for objects within the Solar System? a. The distance between the Sun and its planet. b. The mass of the planet. c. The electric charge of the Sun. d. The mass of the Sun.32. At a given point above the surface of the Earth, the gravitational acceleration is equal to 5.4 m/s². Take the Earth mass M = 5.97x1024 kg and radius R = 6378 km. The altitude of this point, above the surface of the Earth, in km, is closest to: 33. What does the scale read? (Hint: t = rxF) a. 6900 b. 2800 C. 4200 d. 5700 e. 2200 a. b. C. d. a. b. C. d. e. C. 34. A solid cylinder of 5 cm radius is positioned on a frictionless plane inclined at 30 degrees above horizontal. A force F is exerted by a string wrapped around the spool. When F has a certain critical value the center of mass of spool does not move. When this is the case, what is the angular acceleration of the spool? (Hint: t = la) 0001 1910 a. b. e. 500 N 1000 N 2000 N 4000 N 392 rad/s² 340 rad/s² 260 rad/s² 196 rad/s² 98 rad/s² Scale 30" Massless rod 1000 N 4.05 138 35. Two buckets spin around in a horizontal circle on frictionless bearings. Suddenly, it starts to rain. As result, The buckets speed up because the…
- A space probe with a diameter of 2.50m is moving past Saturn's moon Enceladus. An observational platform on Enceladus measures the shortest length of the ellipsoidal probe to be 1.25m. How fast is the probe moving relative to the moon? a) .999c b) .995c c) .957c d) .883c e) .866c3. Why did astronauts feel "light as a feather" when they landed on the Moon? a. The Moon has more mass than the Earth, therefore a stronger gravitational force. b. The Moon has less mass than the Earth, and therefore a stronger gravitational force c. The Moon has more mass than the Earth, therefore a weaker gravitational force. d. The Moon has less mass than the Earth, therefore a weaker gravitational force.1. Which of the following theories is probabilistic? a. Newton's Law of Gravity. b. Kepler's Laws of Planetary Motion. c. Quantum Mechanics. d. General Relativity.
- 23. Which of the following best describes the sentence, “Simultaneity is not absolute.”? a. The laws of physics may be different in different inertial frames of reference. b. Events may appear simultaneous in all frames of reference. c. Events may not appear simultaneous in all frames of reference. .d.The speed of light is not the same in all frames of reference.Which of the four fundamental forces acts over very long distances but does not cause planets in the solar system to pull on each other? O A. Weak nuclear B. Electromagnetic O C. Strong nuclear D. GravitationalThe rotation of the planets around the sun is governed by: A. The gravitational field of the sun. B. The gravity of the stars. C. The heat energy of the sun. D. The gravity of the other planets of the solar system. Kelper's second law relates between them: O A. The time period of rotation of the orbiting planet around the sun and the average distance of the planet to the sun. OB. The time period of rotation of the orbiting planet around the sun and the average distance of the planet to the earth. C. The time period of rotation of the orbiting planet around the sun and the average distance of the planet to the moon. OD. The time period of rotation of the orbiting planet around the earth and the average distance of the planet to the sun.
- 6.) Planet X has 10 times the mass of the Earth’s mass. The star that it orbits has the same mass as our Sun.The planet average distance from its star is 2.5826 (10)11 ??.a) What is the gravitational force between Planet X and its star in units of Newtons?b) What is the velocity of Planet X as it orbits its star in units of metres per second?3. What will happen if: a. the object travels closer to the speed of light? b. the object travels at the speed of light? c. the object travels faster than the speed of light?21. The maximum acceleration of a car while towing a second identical car, compared to its acceleration with no car in tow, is A. one half. E. none of these B. one third. C. one fourth. D. would fly off in a hyperbolic path would spiral in rather quickly on cosmic time scales something else the same. 22. If an alien life form would suddenly cause the Sun to collapse into a black hole, the Earth A. would get sucked in immediately B. would fly off in a straight line C. D. E.