In old western movies, cowboys often would put their ear to a train track to listen for an oncoming train. what benefit would this method provide over listening for a train by listening for sound through the air?
a) the sound would be louder.
b) the sound would be undistorted.
c) the sound would reach him sooner.
d) the sound would higher in frequency.

Using gravity, an elephant can pull a mouse towards it from the ground. true or false explain why. will give brainliest if answered fast and the best explanation

Ahorizontal force of 400.0 n is required to pull a 1760 n truck across the floor at a constant speed. find the coefficient of sliding friction.

Ateacher explains that a scientist named boyle did many experiments to determine what the relationship is between the volume and pressure of a gas. boyle's experiments tell what will occur in the relationship between gas and pressure. which choice is the best name for these experiments? a. boyles' law, because it describes what will occur everywhere on earth. c. boyles' theory, because the experiments show why gas pressure and volume are related. b. boyles' law, because it describes what will happen in the relationship between the pressure and volume of the gas. d. boyles' theory, because it describes what will happen in the relationship between the pressure and volume of the gas.