Question

Imagine a planet orbiting a star. Observations show a Doppler
shift in the star's spectrum of 63 m/s over the 4.6 day orbit of
the planet. What is the mass of the planet in kg? Assume the star
has the same mass as the Sun (2.0 × 10^{30} kg), there are
365.25 days in a year, and 1AU = and 1.5 × 10^{11} m.

Answer #1

Imagine two planets orbiting a star with orbits edge-on to the
Earth. The peak Doppler shift for each is 90 m/s , but one has a
period of 6 days and the other has a period of 600 days. The star
has a mass of one solar mass. Assume 1 solar mass equals 2*10^30
kg. What is: A. the mass of the planet with the shorter period, and
B. the mass of the planet with the longer period.

A planet of mass ?=4.55×1024 kg is orbiting in a circular path a
star of mass ?=8.55×1029 kg . The radius of the orbit is ?=1.75×107
km . What is the orbital period (in Earth days) of the planet
?planet ?

Kepler’s Laws of Planetary Motion:
1. A newly discovered exoplanetary system has a planet orbiting
its host star at 50 times the distance from the Earth to the sun.
If the orbital period of the planet is 40 Earth years, what is the
mass of the host star?
2. The mass of the Earth is approximately 6 × 1026
kg. If the moon takes 27 days to orbit the Earth, how far is the
moon from the Earth?
3. A...

9. Planet Berth! Imagine a planet, which we’ll call
Berth, orbiting a star identical to the sun at a distance of 1 AU.
Assume that Berth has eight times as much mass as Earth and is
twice as large as Earth in diameter.
a) How does Berth’s density compare to Earth’s
b) How does Berth’s surface area compare to the Earth’s?
c) Based on your answers to a) and b), discuss how Berth’s
geological history is likely to have differed...

a) Your cosmic journey brought you into the vicinity of a
neutron star. In fact, you are orbiting this neutron star at an
orbital distance of 2,184 kilometers. The neutron star has mass of
1.6 solar masses (MSun = 1.99 × 1030
kg).
What is the local acceleration due to gravity that you experience
in your spaceship? Express your answer in m/s2; use
scientific notation and round the coefficient to two decimals.
b) What is the escape velocity from Earth’s...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 4 minutes ago

asked 4 minutes ago

asked 5 minutes ago

asked 10 minutes ago

asked 10 minutes ago

asked 12 minutes ago

asked 12 minutes ago

asked 14 minutes ago

asked 16 minutes ago

asked 21 minutes ago

asked 25 minutes ago