Why do you suppose water has been such a popular heat transfer ...

[Shelles]

Why do you suppose water has been such a popular heat transfer material (steam heat, hot water systems, etc)?
 
  What will be an ideal response?

Question 2

Why does the Doppler shift method of detecting extrasolar planets only give us the minimum mass of a planet?
 
  A) because we don't necessarily know the density of the planet
  B) because we don't necessarily know the angle the planet's orbit makes with our line of sight
  C) because we don't necessarily know the diameter (size) of the planet
  D) because we don't necessarily know the mass of the parent star very

[janieazgirl]

Answer to Question 1

It is readily available, but more importantly, it has a relatively large heat capacity and latent heat values. Hence, it can store large quantities of heat to be transferred elsewhere.

Answer to Question 2

B

[Shelles]

Great answer, keep it coming

[kusterl]

Thanks for the timely response, appreciate it