What makes the subject of star formation so difficult and complex?

You add 500ml of water at 10celsius to a 100ml of water at 70 Celsius. What is the most likely final temperature of the mixture? A. 10c B. 20c C. 80c D. 60c

What is universal laws of gravitation

What momentum does a 70 kg person running 10m/s (a fast sprint) have?

A distant galaxy is determined to be 150 million light years distant and moving away from us; using the Hubble law determine its velocity in terms

N Rutherford's gold foil experiment the alpha particles pass through which part of the atom? A. the nucleus B. the proton shield C. the electron cloud D. the valence electron shell

What is the source of energy for the process of evaporation?

How could you compare the energy carried in two different longitudinal waves

The instantaneous velocity of an object is the blank of the object with a blank

Which of the following best describes the earth's average surface temperature for the past 900,000 years? A. a steady warming trend B. fairly steady temperatures until recently C. prolonged periods of cooling and warming D.

What should you always include in a great summary? (Select all that apply) A. investigation plan B. possible errors C. predictions D. new questions