Students raced each other in the gym while the teacher recorded each student's speed. jeremy ran 14 miles per hour, isaiah ran 10 miles per hour, jonah ran 13 miles per hour, and alexis ran 16 miles per hour. which of the bar graphs should the teacher use to compare the students' speeds?

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?