Answer the following question given this paragraph: If you have ever been in a room when a piping hot pizza was delivered, you have been made aware of the fact that gaseous molecules can quickly spread throughout a room, as evidenced by the pleasant aroma that soon reaches your nose. Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be hundreds of times the diameter of the molecule In general, we know that when a sample of gas is introduced to one part of a closed container, its molecules very quickly disperse throughout the container; this process by which molecules disperse in space in response to differences in concentration is called diffusion (shown in Figure 9.27). The gaseous atoms or molecules are, of course, unaware of any concentration gradient, they simply move randomlyregions of higher concentration have more particles than regions of lower concentrations, and so a net movement of species from high to low concentration areas takes place. In a closed environment, diffusion will ultimately result in equal concentrations of gas throughout, as depicted in Figure 9.27. The gaseous atoms and molecules continue to move, but since their concentrations are the same in both bulbs, the rates of transfer between the bulbs are equal (no net transfer of molecules occurs). Q: The mean free path for a gaseous molecule will be hundreds of times the what of the molecule? Choices: - variation - weight - density - diameter A:
diameter
(Question)
Answer the following question given this paragraph: Gas particles are constantly moving and bumping into things, and this creates force. The amount of force pushing against a given area is called pressure. Q: What is the term for an amount of force pushing against a given area? Choices: - mass - force - resistance - pressure A:
(Answer)
pressure
Ques: Answer the following question given this paragraph: Q: What is the term for an infection caused by a fungal parasite? Choices: - mydriasis - mitosis - acrobasis - mycosis A:
Ans: mycosis
(Q).
Answer the following question given this paragraph: After puberty, an egg develops in an ovary about once a month. As you can see in Figure below , the egg rests in a nest of cells called a follicle. The follicle and egg grow larger and go through other changes. Q: What is the nest of cell an egg rests in called? Choices: - mitochondria - pod - epidermis - follicle A:
(A).
follicle
Ques:Answer the following question given this paragraph: can occur in electrolytic cells by introducing a power supply, which supplies the energy to force the electrons to flow in the nonspontaneous direction. Electrolysis is done in solutions, which contain enough ions so current can flow. If the solution contains only one material, like the electrolysis of molten sodium chloride, it is a simple matter to determine what is oxidized and what is reduced. In more complicated systems, like the electrolysis of aqueous sodium chloride, more than one species can be oxidized or reduced and the standard reduction potentials are used to determine the most likely oxidation (the half-reaction with the largest [most positive] standard reduction potential) and reduction (the half-reaction with the smallest [least positive] standard reduction potential). Sometimes unexpected half-reactions occur because of overpotential. Overpotential is the difference between the theoretical half-reaction reduction potential and the actual voltage required. When present, the applied potential must be increased, making it possible for a different reaction to occur in the electrolytic cell. The total charge, Q, that passes through an electrolytic cell can be expressed as the current (I) multiplied by time (Q = It) or as the moles of electrons (n) multiplied by Faraday's constant (Q = nF). These relationships can be used to determine things like the amount of material used or generated during electrolysis, how long the reaction must proceed, or what value of the current is required. Q: The difference between the theoretical half-reaction reduction potential and the actual voltage required is called what? Choices: - resistance - excess - overcharge - overpotential A:

Ans:overpotential
Question: Answer the following question given this paragraph: The digestive system has three main functions: digestion of food, absorption of nutrients, and elimination of solid food waste. Digestion is the process of breaking down food into components the body can absorb. It consists of two types of processes: mechanical digestion and chemical digestion. Q: What is the process of breaking down food into components the body can absorb called? Choices: - absorption - filtration - excretion - digestion A:
Answer:
digestion