To investigate seed growth in different levels of light, jarrod covers seeds with soil in three different containers. he places a pea seed in a short, wide plastic cup, a cucumber seed in tall, skinny glass, and a tomato seed in a shallow, plastic dish. he places the plastic cup in a window sill in direct sunlight, the glass outside in partially shaded area, and the dish in his closet in the dark. he will leave the containers in those places for one week, and record the growth at the end of his investigation. how could jarrod's investigation be adapted to create a fair test

Does heating a metal wire increase or decrease its electrical resistance? why?

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.

Which symbol in the first law of thermodynamics represents the sum of the chemical and thermal energy stored in atoms and molecules? a. q b.w c.v d.u