Two stars of equal mass orbit one another. (This is called a binary star system.) If...

Two stars of equal mass orbit one another. (This is called a binary star system.) If the stars’ orbits have a semimajor axis of 2.5x10^8 km and complete one orbit every 2.4 years, what is the mass of each star? pick from: (8.1x10^29 kg, 1.6x10^30 kg, 8.1x10^20 kg, 1.6x10^21 kg)

A satellite orbits a planet at a distance r. If it has a circular orbit, the total energy (E=K+U) of the satellite is equal to:

Hint: F_centripetal=mv^2/r pick from: (E=0, E=-U/2, E=U, E=U/2)

A probe is brought to rest a distance of 1.5x10^11 m from the Sun, and allowed to fall directly into the Sun. How fast will the probe be moving when it collides with the Sun? The mass of the Sun is 2.0x10^30 kg, and its radius is 7.0x10^8 m. Hint: Consider energy conservation. pick from: (620 km/s, 42 km/s, 1.8x10^6 km/s, 3.8x10^5 km/s)

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genius_generous answered 1 year ago

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