How could renewable energy sources be used to power a car?

Whether or not a given study has the possibility of causing harm to participants:

Aresearcher is studying women recently admitted to a state prison. all potential subjects must have children under the age of five. research subjects will be given a basket of toys to use at their children’s first visit that the children can then take home. in assessing this proposal, the irb needs to determine that the toys are: age appropriate. not an excessive incentive. educational. of high quality.

Music the height of a wave or the amount of the wave carries is the amplitude. a. air b. nodes c. speed d. energy