Aparticle moves at a constant speed of 34 m/s in a circular path of radius 6.3 m. from this information, what can be calculated about the particle?

mass

centripetal force

centripetal acceleration

density

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

Ain is , is 's of ? 0.62 0.79 1.27 1.50

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.