Q: Find the overall magnification of what instrument by finding the magnification of the objective, then the magnification of the eyepiece? Read this paragraph and choose the correct option from the provided answers: Example 26.5 Microscope Magnification Calculate the magnification of an object placed 6.20 mm from a compound microscope that has a 6.00 mm focal length objective and a 50.0 mm focal length eyepiece. The objective and eyepiece are separated by 23.0 cm. Strategy and Concept This situation is similar to that shown in Figure 26.16. To find the overall magnification, we must find the magnification of the objective, then the magnification of the eyepiece. This involves using the thin lens equation. Solution The magnification of the objective lens is given as. Choices: - belt microscope - Fixing microscope - part microscope - compound microscope A:
compound microscope

(Question)
Q: When an atom gains or loses an electron it becames an? Read this paragraph and choose the correct option from the provided answers: Sometimes atoms lose or gain electrons. Then they become ions . Ions have a positive or negative charge. That's because they do not have the same number of electrons as protons. If atoms lose electrons, they become positive ions, or cations. If atoms gain electrons, they become negative ions, or anions. Choices: - electron - photon - neutron - ion A:
(Answer)
ion

Ques: Q: What evolutionary process does not favor altruistic behavior that causes the death of the altruist? Read this paragraph and choose the correct option from the provided answers: Choices: - flow selection - characteristic selection - random selection - natural selection A:
Ans: natural selection

(Q).
Q: What term refers to the deliberate prevention of pregnancy? Read this paragraph and choose the correct option from the provided answers: Choices: - reproduction - cessation - abortion - contraception A:
(A).
contraception

Ques:Q: What is electrons in the highest occupied principal energy level of an atom called? Read this paragraph and choose the correct option from the provided answers: In the study of chemical reactivity, we will find that the electrons in the outermost principal energy level are very important and so they are given a special name. Valence electrons are the electrons in the highest occupied principal energy level of an atom. In the second period elements listed above, the two electrons in the 1 s sublevel are called inner-shell electrons and are not involved directly in the element's reactivity or in the formation of compounds. Lithium has a single electron in the second principal energy level and so we say that lithium has one valence electron. Beryllium has two valence electrons. How many valence electrons does boron have? You must recognize that the second principal energy level consists of both the 2 s and the 2 p sublevels and so the answer is three. In fact, the number of valence electrons goes up by one for each step across a period until the last element is reached. Neon, with its configuration ending in s 2 p 6 , has eight valence electrons. Choices: - non-valence electrons - shell electrons - gradient electrons - valence electrons A:

Ans:valence electrons

Ques: Q: While most mammals give birth to live young, monotremes can do what? Read this paragraph and choose the correct option from the provided answers: Monotremes can lay eggs, but most mammals give birth to live young. Choices: - reproduce asexually - adopt offspring - steal eggs - lay eggs A:
Ans:
lay eggs