Comets
- a. follow orbits around the earth
- b. follow orbits around the sun
- c. move randomly through the solar system
- d. are the tracks left in the atmosphere by meteoroids
The movement of comets.
Answer to Problem 1MC
Option-(b)-“follow orbits around the earth.”
Explanation of Solution
Comets are the transient visitors that constitute the night sky apart from stars, planets and moon. It is mainly composed of ice and dust. Apart from this, smaller amounts of various frozen gases such as carbon monoxide, carbon dioxide, methane, ammonia, and hydrogen cyanide are also present.
The paths of comets that periodically pass near the earth are entirely different from the nearly circular planetary orbits. The orbits of comets are long and narrow and they approaches the sun from far out in space beyond Pluto, swings around the sun and then retreats. Comets returns at regular intervals.
Conclusion:
Comets approaches the sun far out in space beyond Pluto, and they swings around sun before retreats. Hence, option (b) is correct.
Comets will not follow the orbits around the Earth. Hence, option (a) is incorrect.
Comets cannot move randomly through the solar system. They returns at regular intervals only. Hence option (c) is incorrect.
Comets are not the tracks left in the atmosphere by meteoroids. Hence option (d) is incorrect.
Want to see more full solutions like this?
Chapter 17 Solutions
The Physical Universe
- No chatgpt pls will upvotearrow_forwardair is pushed steadily though a forced air pipe at a steady speed of 4.0 m/s. the pipe measures 56 cm by 22 cm. how fast will air move though a narrower portion of the pipe that is also rectangular and measures 32 cm by 22 cmarrow_forwardNo chatgpt pls will upvotearrow_forward
- 13.87 ... Interplanetary Navigation. The most efficient way to send a spacecraft from the earth to another planet is by using a Hohmann transfer orbit (Fig. P13.87). If the orbits of the departure and destination planets are circular, the Hohmann transfer orbit is an elliptical orbit whose perihelion and aphelion are tangent to the orbits of the two planets. The rockets are fired briefly at the depar- ture planet to put the spacecraft into the transfer orbit; the spacecraft then coasts until it reaches the destination planet. The rockets are then fired again to put the spacecraft into the same orbit about the sun as the destination planet. (a) For a flight from earth to Mars, in what direction must the rockets be fired at the earth and at Mars: in the direction of motion, or opposite the direction of motion? What about for a flight from Mars to the earth? (b) How long does a one- way trip from the the earth to Mars take, between the firings of the rockets? (c) To reach Mars from the…arrow_forwardNo chatgpt pls will upvotearrow_forwarda cubic foot of argon at 20 degrees celsius is isentropically compressed from 1 atm to 425 KPa. What is the new temperature and density?arrow_forward
- Calculate the variance of the calculated accelerations. The free fall height was 1753 mm. The measured release and catch times were: 222.22 800.00 61.11 641.67 0.00 588.89 11.11 588.89 8.33 588.89 11.11 588.89 5.56 586.11 2.78 583.33 Give in the answer window the calculated repeated experiment variance in m/s2.arrow_forwardNo chatgpt pls will upvotearrow_forwardCan you help me solve the questions pleasearrow_forward
- Can you help me solve these questions please so i can see how to do itarrow_forwardHow can i solve this if n1 (refractive index of gas) and n2 (refractive index of plastic) is not known. And the brewsters angle isn't knownarrow_forward2. Consider the situation described in problem 1 where light emerges horizontally from ground level. Take k = 0.0020 m' and no = 1.0001 and find at which horizontal distance, x, the ray reaches a height of y = 1.5 m.arrow_forward
- Horizons: Exploring the Universe (MindTap Course ...PhysicsISBN:9781305960961Author:Michael A. Seeds, Dana BackmanPublisher:Cengage LearningAstronomyPhysicsISBN:9781938168284Author:Andrew Fraknoi; David Morrison; Sidney C. WolffPublisher:OpenStax