What three factors affect permeability?
What will be an ideal response?
Answer: Permeability is the ease with which water flows through a material. Permeability is affected by pore spaces—specifically the number, size, and interconnection of pore spaces.
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Refracting Telescope: The length of the telescope is 1.60 m, and it has a magnification of 60.0. What is the focal length of the objective lens?
A. 60.0 cm B. 157 cm C. 100 cm D. 128 cm E. 96.0 cm
Which of the following statements is true?
A: Nothing can travel faster than the speed of light B: There is a black hole at the center of our Solar System C: If the Sun were magically to turn into a black hole, Earth's orbit would immediately change D: Although visible light cannot escape from inside the event horizon of a black hole, high energy radiation, such as gamma rays, can escape E: Black holes defy the laws of gravity
Hydrocarbon fuels come from
A) the original geological processes that formed planet Earth billions of years ago. B) lava flows from volcanoes that erupted millions of years ago. C) Disneyland. D) hydrocarbon ores that are mined and then milled in order to extract the small fraction of hydrocarbon in them. E) the remains of plants and animals that died millions of years ago.
Which of the following is a strong acid?
a. Citric acid b. Nitric acid c. Phosphoric acid d. Acetic acid