Practice Test |
Please solve the following questions. This is not a real exam, it will not be graded, and you do not need to submit your solutions to anyone. The questions are simply intended to help you practice for the real exam. These questions will not appear in the exam itself. Students who don't genuinely attempt to solve the questions on their own, and only memorize the solutions, will have a very hard time in the actual exam! This sample exam is online, but the real exam will be given in person, at a time and place indicated on the course website. THIS IS NOT THE ACTUAL EXAM! If you need any clarifications for these questions, you can ask for them on the course Teams channel. |
Question 1I found a hydrogen-9 isotope. How many neutrons does it have? Question 2I see a very bright star. This could mean: Question 3Object A has mass 1 kg. Object B has mass 3 kg. According to E=mc2, how much rest energy does object B have compared to A? Question 4Which of the following is a main-sequence star? Question 5Photon A has wavelength 2 cm. Photon B has wavelength 1 cm. Which photon has a higher frequency? Question 6Which of the following stars is the brightest in the sky? Question 7Compared to RR Lyrae variables, cepheid variables typically have... Question 8I want to measure the distance to a star that is estimated to be a few thousand light-years away. Which method should I use? Question 9Which of the following is a blue giant? Question 10What kind of mass is defined as resistance of an object to acceleration? Question 11A star is located on the top left of the H-R diagram. This star has... Question 12A proton is made of... Question 13In the H-R diagram, red dwarfs can be found... Question 14If a particle has charge -1, what would be the charge of its antiparticle? Question 15If the spectral lines of a star shift toward blue, this means... Question 16What happens to the mass in electron-positron annihilation? Question 17Which of the following is the longest? Question 18Star A has brighter apparent magnitude than star B. What does that say about the luminosity of the two stars? Question 19A star was measured to have a parallax of 0.2 arc seconds. How far away is the star? Question 20In an atom, the electrons are located... Question 21In the proton-proton chain, how many total hydrogen nuclei do we start with? (Remember that steps 1 and 2 happen twice in a full chain!) Question 22A photon has a wavelength of 700 nm. What color is it? Question 23Which is the dominant process used in a star with 2.7 solar masses to generate light? Question 24I observed an object, larger than Earth but smaller than the Sun, which does not generate light by either deuterium or hydrogen fusion. What is it? Question 25Which of the following stars is the hottest?
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