Which statement about acids is true? acids turn red litmus paper blue. acids feel slippery and have a bitter taste. acids donate hydrogen ions to water when they dissolve. acids are ionic compounds formed when a metal atom replaces hydrogen.

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.)

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

Which of the following are guidelines to follow for obtaining accurate observations