Through the process of simple diffusion, materials move across a cell membrane

a.

from an area of higher concentration to an area of lower concentration.

b.

from an area of lower concentration to an area of higher concentration.

c.

between areas of equal concentration.

d.

all of these

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1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.