题目
题目

ASTR 350 ONL FA25: Big Bang,Black Holes,Universe (Liu, X)

单项选择题

If the Sun disappeared, what would happen to the Earth’s orbit?

选项
A.a. Earth would fly off a straight line into space.
B.b. Earth would continue its current orbit.
查看解析

查看解析

标准答案
Please login to view
思路分析
Restated question: If the Sun disappeared, what would happen to the Earth’s orbit? Answer options: - a. Earth would fly off a straight line into space. - b. Earth would continue its current orbit. Analysis of......Login to view full explanation

登录即可查看完整答案

我们收录了全球超50000道考试原题与详细解析,现在登录,立即获得答案。

类似问题

If you drop something off the Empire State Building, why doesn't it orbit the Earth?

​What causes an asteroid to drop out of orbit and travel toward Earth? 

Question textThree classmates debate how Newton’s law of universal gravitation explains satellite motion.Task: For each student, select the option that best evaluates the reasoning. Student 1“A satellite in circular orbit around Earth is not accelerating because its speed remains constant.”Answer 1 Question 22[select: , Correct. Speed is constant, so there is no acceleration in orbit., Incorrect. Even though speed is constant, velocity is continuously changing direction, so the satellite is accelerating toward Earth., Acceleration only occurs if the satellite changes altitude.] Student 2“The force of gravity on a satellite decreases with increasing distance, but if the satellite moves farther out, it must move faster to stay in orbit.”Answer 2 Question 22[select: , Correct. A satellite farther away needs higher velocity to maintain orbit., Incorrect. A satellite farther from Earth actually moves slower; weaker fields mean longer orbital periods., Orbital speed is the same for all satellites regardless of altitude.] Student 3“The International Space Station orbits low above Earth. Its orbital period is short because the gravitational field is stronger closer to Earth.”Answer 3 Question 22[select: , Correct. Stronger fields at lower altitudes produce higher orbital speeds and shorter periods., Incorrect. Lower satellites move more slowly, so their periods are longer., Orbital period does not depend on altitude.]

Which location is the Perihelion? 

更多留学生实用工具

加入我们，立即解锁 海量真题 与 独家解析，让复习快人一步！