« previous next »

Author Question: To measure how Mercury spins, astronomers sent ________ to Mercury and used the Doppler shift to ... (Read 44 times)

DelorasTo

  • Hero Member
  • *****
  • Posts: 548
on: Jul 27, 2018
To measure how Mercury spins, astronomers sent ________ to Mercury and used the Doppler shift to determine how fast it was rotating.
 
  A) probes
  B) laser beams
  C) radar beams
  D) a satellite
  E) a single frequency radio signal

Question 2

The place in a planet's orbit that is closest to the Sun is called:
 
  A) vernal equinox.
  B) aphelion.
  C) perihelion.
  D) crossing the ecliptic.
  E) None of these; a planet's distance from the Sun never changes.


AISCAMPING

  • Sr. Member
  • ****
  • Posts: 347
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

The longest a person has survived after a heart transplant is 24 years.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

The Reinstatement Procedure, a Measure of Craving The Reinstatement Procedure, a Measure of Craving
Sample Items from the Brief Multidimensional Measure of Religiousness/Spirituality (BMMRS) Sample Items from the Brief Multidimensional Measure of Religiousness/Spirituality (BMMRS)
Sociologists use income, education, and occupational prestige to measure social class. For most ... Sociologists use income, education, and occupational prestige to measure social class. For most ...
Doppler effect Doppler effect
How to vertically shift a quadratic function along the y-axis How to vertically shift a quadratic function along the y-axis
The Doppler Effect The Doppler Effect
Video: Secretin (inhibiting gastric acid secretion), Cholecystokinin (fat digestion) & Cholecystokinin

For a complete list of videos, visit our video library