The Doppler technique can be used to measure the eccentricity of a planet's orbit by
A) measuring the amount by which the starlight is reduced when the planet transits.
B) measuring the asymmetries in the velocity curve.
C) measuring the time it takes for the star's line-of-sight velocity to cycle from peak to peak, and using Newton's version of Kepler's Third law.
D) measuring the speed at which the star orbits the mutual center-of-mass of the star and planet, and using Newton's theory of gravity.
B
You might also like to view...
Faraday's Law: A round flat conducting loop is placed perpendicular to a uniform 0.50 T magnetic field. If the area of the loop increases at a rate of 3.0 × 10-3 m2/s, what is the induced emf in the loop?
A. 4.3 mV B. 0 mV C. 1.5 mV D. 1.7 mV E. 5.5 mV
Sunsets are red because sunlight must pass through more atmosphere then, and the atmosphere scatters even more light at bluer wavelengths, leaving mostly red light to color the sky
Indicate whether the statement is true or false
A sample of an ideal gas is slowly compressed to one-half its original volume with no change in temperature. What happens to the average speed of the molecules in the sample?
A) It does not change. B) It quadruples. C) It doubles. D) It halves. E) none of the above
A blue laser beam is incident on a metallic surface, causing electrons to be ejected from the metal. If the frequency of the laser beam is increased while the intensity of the beam is held fixed,
A) the rate of ejected electrons will increase and their maximum kinetic energy will increase. B) the rate of ejected electrons will remain the same but their maximum kinetic energy will decrease. C) the rate of ejected electrons will remain the same but their maximum kinetic energy will increase. D) the rate of ejected electrons will decrease and their maximum kinetic energy will increase.