Describe two proposed methods for interstellar rocket propulsion. Describe in your own words the concept of warp drive (one paragraph) Thank you!

According to the law of conservation of mass, in a chemical reaction the total starting mass of all the reactants equal the total final mass of all the products. true or false?

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)