Each of the following lists two facts. Which pair of facts can be used with Newton's version of Kepler's third law to determine the mass of the Sun?

A) Mercury is 0.387 AU from the Sun and Earth is 1 AU from the Sun.
B) Earth rotates in one day and orbits the Sun in one year.
C) The mass of Earth is 6 × 1024 kg and Earth orbits the Sun in one year.
D) Earth is 150 million km from the Sun and orbits the Sun in one year.


D

Physics & Space Science

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Spectra for the Cygnus loop and the Orion nebula are shown above. Which of these is seen in the Orion nebula, but is not clearly visible in the Cygnus loop spectrum?

A) ionized sulfur B) atomic helium C) atomic hydrogen D) ionized oxygen

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Impulse: A super dart of mass 20 g, traveling at 350 m/s, strikes a steel plate at an angle of 30° with the plane of the plate, as shown in the figure. It bounces off the plate at the same angle but at a speed of 320 m/s. What is the magnitude of the impulse that the plate gives to the bullet?

A. 0.52 N ? s B. 4.3 N ? s C. 300 N ? s D. 6.7 N ? s E. 0.30 N ? s

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Which of the following explains why the stars visible in our sky just after sunset are different from those visible just before sunrise?

A) Earth rotates once each day. B) Earth orbits the Sun once each year. C) The direction of Earth's axis in space precesses with a period of about 26,000 years. D) Stars appear to move randomly relative to our Sun in the local solar neighborhood. E) The universe is expanding.

Physics & Space Science

Quasar ________ lines are an indication of intervening cooler gas

Fill in the blank(s) with correct word

Physics & Space Science