Which of the following would convert chemical energy to mechanical energy? Group of answer choices
Jet Ski

Cars

Humans

All of the above

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?

What best discribes the relationship between wavelength and frequency in a electromagnetic wave