You drop a stone down a well that is 9. 5 m deep. How long is it before you hear the splash? the speed of sound in air is 343 m/s and air resistance is negligible.

Iconic memory is used when a loud thunderclap occurs during a storm. select the best answer from the choices provided t f

What is it called when someone gets sick from eating food contaminated with germs or toxins? a. potentially hazardous food b. ptomaine poisoning c. foodborne illness d. raw food

Dna is a polymer of which consist of a sugar, a phosphate group, and a a. amino acids; nucleotide b. nucleic acids; nucleotide c. nucleotides; nitrogenous base d. nucleotides; nucleic acid e. proteins; nucleotide