She performed a lot of work
Under blue light, an apple will appear black because it absorbs the blue light and has no red light to reflect. In contrast, if magenta light is shined on the apple, it will appear red because magenta light is comprised of red and blue light. The blue light will still be absorbed, but the red will be reflected.
Lubricant is a type of oil. It smoothes surfaces. Meaning anything rubbing against the other object wont produce enough heat, which is what creates friction. Its an ideal tool to use for a lot of things.
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Answer:
Pressure is a quantity that may be measured in a variety of units such as atm and bar. However, the Pascal is used to measure pressure in the SI system. One Pascal is the pressure exerted perpendicularly on an area of one square meter by a force of magnitude one Newton.