Magnitudes Study guides, Class notes & Summaries

What is the definition of the Astronomical Unit? correct answer: The average distance between the Sun and the Earth Which sequence is correct when ordered by increasing size? correct answer: Earth Solar System Milky Way Galaxy Galaxy Clusters How many stars does a typical galaxy like the Milky Way Galaxy contain? correct answer: a few hundred billion How long does it take for light to cross the diameter of the Milky Way Galaxy? correct answer: about 100,000 years Which of the ...

The pilot of a spacecraft moving horizontally at 10 m / s notices that the hailstones going past the port window makes an angle of 45° with the downward vertical. What is the speed of the hailstones with respect to the ground, assuming that there is no wind? Select one: a. 10 m / s b. 14 m / s c. 20 m / s d. 21 m / s The correct answer is: 10 m / s Grade 0.00 out of 150.00 (0%) Feedback Unfortunately you didn’t get over a 70% on your first examination (70% is...

Q32618 When a high voltage transmission line circuit breaker trips open as a result of a fault, a synchronous check relay will monitor certain values on both the line side and the bus side of the open circuit breaker. Before the synchronous check relay re-closes the open circuit breaker, which of the following values has to be within a certain limit before the circuit breaker will close automatically? CORRECT ANSWER •) Frequency •) Voltage Magnitudes •) Phase Angle between the voltages ...

astro 3 quizzes 7 & 8Most stars in our galaxy are like this one. Canopus Anilam Betelgeuse Sirius B Barnard's star - correct answer Barnard's star(red dwarfs and MS stars) On a dark night, we can see a range of about 5 magnitudes in brightness between the brightest and faintest stars in the sky. The brightest stars therefore appear about — times brighter than the faintest stars. 2.5 1000 5 100 10 - correct answer 100 Which star is a red giant? Anilam Sirius B Betelgeuse ...

To find the most accurate distance to a nearby star using parallax, astronomers could compare the view of the star against the background stars at what times of the year? - In January and July Which of the following correctly expresses the distance to a nearby star? - 1.3 parsecs Consider two stars (Y and Z) that both exhibit parallax. Star Z appears to move back and forth against the background stars by a greater amount than Y. Which star is farther away from Earth? - Star Y A star has a p...

PHY 250 General Physics I All Graded Exams 2023/2024 100%Verified and Updated by Expert. Question 1 Correct 6.00 points out of 6.00 What is the acceleration of a skydiver at terminal velocity whose mass is 80 kg and cross-sectional area is 14 m2 . The density of the air he is falling through is 0.9984 g / m 3 . The drag coe_cient has a value of 0.485. Select one: a. 15.2 m / sec2 b. 56.4 m / sec2 c. 0 m / sec2 d. 481 m / sec2 e. None of the above Question 2 Incorrect 0.00 point...

physics - the study of forces, energy, motion Chemistry - study of atoms and molecules, their structures, and their interactions to form various substances. Earth Science - Earth's structure and composition, as well as the processes that change Earth, such as volcanic and seismic activity. astronomy - The study of the moon, stars, and other objects in space Science - An organized way of gathering and analyzing evidence about the natural world. Precision - a measure of how close a series ...

physics the study of forces, energy, motion Chemistry study of atoms and molecules, their structures, and their interactions to form various substances. Earth Science Earth's structure and composition, as well as the processes that change Earth, such as volcanic and seismic activity. astronomy The study of the moon, stars, and other objects in space Science An organized way of gathering and analyzing evidence about the natural world. Precision a measure ...

The gravitational force between two objects has a magnitude of F. If both masses were doubled and the distance between them doubled, the new force would have which of the following magnitudes? Select one: a. b. c. F d. 2F A certain galaxy is receding from observers on Earth at a speed of 0.94c. Within that galaxy, a star explodes, sending hot gases back towards the Earth. Relative to the galaxy, these gases travel at a speed of 0.67c. What is the speed of the gases relative to Earth? Se...

Rigidity is determined by what three factors? - correct answer -Rotor shape, rotor weight, and rotor speed. Any machine that has a spinning or rotating shaft and uses electricity as the input or output is ______________. - correct answer -Rotating Machinery What are the two categories of rotating machinery? - correct answer -Motor and generator. A __________ uses an electrical input and converts it to a rotating mechanical output. - correct answer -motor A __________ uses a rotating ...