A lady moves a suitcase of mass 22.3 kg with frictionless wheels across a horizontal floor by pulling on a cord attached to the suitcase making an angle of 0 = 46.4 degrees to the horizontal, as shown in the diagram. If the lady pulls the cord with a force of 15.1 N, what is the magnitude of the acceleration of the suitcase, in units of m/s2

Asher cycles 12 miles in 16 hours. what is his speed?

What is the increase in density of a medium due to wave travel?

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.