Download Astro 7n Exam 1: Newton's Laws, Gravitation, and Celestial Bodies and more Exams Physics in PDF only on Docsity! Astro 7n Exam 1- Copper's Questions With 100% Correct Answers 2024 According to Newton's 2nd law of motion, if the net force acting on the object increases while the mass of the object remains constant, what happens to the acceleration? - Correct Answer-acceleration increases If the Earth were moved to half its current distance from the Sun, how would the force of gravity by the Sun on the Earth change? - Correct Answer-it would become four times stronger What did Newton's Law of Universal Gravitation tell us about how gravity works? - Correct Answer-the force of gravity from the sun will be stronger on an object with more mass The Earth's radius is about 6400 km. If you were in orbit in the space station about 150km from the ground, the force of gravity you would feel from earth would be... - Correct Answer-slightly weaker than when you are standing on earth What would happen to the earth if the suns gravity turned off? - Correct Answer-it would continue to move in a line in the same direction it was moving Consider a planet whose rotation axis is NOT tilted with respect to its orbital plane. What are the seasons like on this planet? - Correct Answer-there are no seasons If the Earth rotated on its axis more slowly than it does now: - Correct Answer-its days would be longer If Earth had its orbit changed so that at all points along its orbit it was always the same distance from the Sun (circular orbit), how would this affect the seasons on Earth? - Correct Answer-they would be the same as they are now A new planet orbits its star faster than the Earth orbits the Sun and it rotates more slowly than the Earth rotates. Which of the following is true? - Correct Answer-new planet has a shorter year and longer day than earth What time of year is it dark all day (and night) at the South pole? - Correct Answer-June Compare the frequency and wavelength of a gamma ray with that of visible light: - Correct Answer-gamma ray frequency is higher and its wavelength is lower If the frequency of radiation is twice as large then its wavelength is - Correct Answer-half as large Compared to blue light, red light has - Correct Answer-longer wavelength, smaller frequency, smaller energy What types of radiation have the lowest energy? - Correct Answer-infrared radiation and radio The spectrum of an oxygen lamp looks different than the spectrum of a sodium lamp because - Correct Answer-each atom has a unique set of electron orbits Dark lines in an absorption spectrum represent: - Correct Answer-particular energies of light coming from a distant object that are absorbed by material in between In what ways does a 30m telescope out perform a 10 m one? - Correct Answer-images 9 times brighter than 10 m
