What is the difference between absorption and adsorption?
What will be an ideal response?
Absorption is the process of taking in a substance such as water vapor and
which typically involves a chemical and or a physical change in the media.
Adsorption also is a process of taking in a substance but which does not involve
a chemical or physical change of the adsorption media. Liquid are typically
absorber, such as ethyl glycol, sulfuric acid, lithium chloride, calcium chloride,
and lithium bromide, while solids, such as silica gel and zeolite, are adsorpters.
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Which of the following supports the idea that the Martian crust is not divided into moving plates like those on Earth? I. the size of Olympus Mons II. the lack of folded mountain chains III. the lack of rift valleys outlining entire plates IV. the presence of dry river beds and sea floors
a. I & II b. II & III c. II, III & IV d. I, II, & III e. I, II, III, & IV
A person on a sled coasts down a hill and then goes over a slight rise with speed 2.7 m/s. The top of this rise can be modeled as a circle of radius 4.1 m. The sled and occupant have a combined mass of 110 kg
If the coefficient of kinetic friction between the snow and the sled is 0.10, what friction force is exerted on the sled by the snow as the sled goes over the top of the rise?
What is a shock wave?
A) a pressure wave that moves slower than the speed of sound B) a pressure wave that moves faster than the speed of sound C) an electromagnetic wave that can create electrical shocks D) an electromagnetic wave created when electrons recombine with protons E) a pressure wave that moves faster than the speed of light
Three resistors with values of R1, R2 and R3, respectively, are connected in series. Which of the following expresses the total resistance, RT, of the three resistors?
a. RT = R1 + R2 + R3 b. RT = (1/R1 + 1/R2 + 1/R3) c. RT = R1 = R2 = R3 d. RT = (1/R1 + 1/R2 + 1/R3)?1