Q1. The answer is b) studying chemicals containing carbon.
Pure chemistry, as its name suggests, is the study of pure, basic theory of chemistry, and has no applied aspect. On the other hand, there is applied chemistry with research for some intended purpose and application. Now let's take a look at the choices: effects of drugs on human (purpose is understanding drug effects), a cure for osteoporosis (applied aspect), an antidote for a new strain of virus (applied aspect) are examples of applied chemistry because they have some purpose. On the other hand, studying chemicals containing carbon has no applied aspect, it is a study because of pure knowledge.
Q2. The answer is d) structure of a muscle cell.
Among choices, only the structure of a muscle cell is not visible to human eyes. Imagine foam insulation, X-ray of a knee joint, a shape of a plant - all of these are visible to human eyes. However, if you want to see a structure of a muscle cell, you will need a microscope. The microscopes are able to magnify specimens and are used to see structures that you cannot see with naked eye.
Q3. The answer is d) responding.
An independent (manipulated) variable is variable that is not affected during the experiment. It is what experimenter controls. A responding variable is also called a dependent variable. The dependent (responding) variable is called dependent because it depends (it responds) on the independent variables. It is what is affected and what is observed during the experiment.
That would be c, the alveoli.
Lithium has 3 electrons while a cation, being a positively charged particle, has less than that; so either 1 or 2 electrons.
To answer this item, we assume that oxygen behaves ideally such that it is able to fulfill the following equation,
PV = nRT
If we are to retain constant the variable n and V.
The percent yield can therefore be solved through the following calculation,
n = (10.5 L)/(22.4 L) x 100%
Simplifying,
n = 46.875%
Answer: 48.87%
There are three measures of retrieval and forgetting, bear in mind, the degree to which a person brings found facts back to conscious cognizance; recognition.
A measure in which someone identifies previously discovered statistics; and relearning, a measure wherein a person is asked to learn facts at a time. There are five popular theories of forgetting in psychology. they are the hint decay principle, retrieval failure idea, interference theory, consolidation concept, and displacement idea.
In keeping with retrieval-failure theory, forgetting happens whilst statistics are available in LTM but aren't accessible. Accessibility relies upon in massive part on retrieval cues. Forgetting is finest whilst context and country are very one-of-a-kind at encoding and retrieval.
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