Which one of the following is a reasonable measurement for the temperature of a refrigerator?
2 points
450°C
45°C
4.5°C
0.45°C

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

v 154.9= 0.9 length length s little over 154.9cm

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