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babymother [125]
2 years ago
12

If a weight lifter is holding barbells above his head, what does he have to do to perform work?

Chemistry
1 answer:
grandymaker [24]2 years ago
6 0

Answer:

For work to be done there must be 2 conditions to be followed:

(i) Force must be applied

(ii) displacement in the direction of force.

So if there is no force or displacement there is no work done. Since there is no displacement, as there is no initial and final position, no work is done. If he moves to a different position, work is done.

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Given 0.02 of KF, how many liters of solution are needed to make a 7.2 solution?
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Answer:

1/360

Explanation:

let x = liters

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Water combines with carbon dioxide Choose one: A. only in the atmosphere. B. to produce hydrogen sulfide. C. to precipitate calc
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Water combines with carbon dioxide to produce slightly acidic groundwater

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This is because the reaction between water and carbondioxide to form

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Assuming acid strength relates directly to number of O atoms bonded to the central atom, rank H₂N₂O₂ [or (HON)₂]; HNO₃ (or HONO₂
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For Less number of oxygen atoms will be less acidic. Therefore, the rank will be.... So there is 1 oxygen atom bonded to each of the 2 nitrogen atoms.

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Acid strength is the tendency of an acid, symbolized by the chemical formula, to dissociate into a proton, and an anion, The dissociation of a strong acid in solution is effectively complete, except in its most concentrated solutions.

The strength of a weak organic acid may depend on substituent effects. The strength of an inorganic acid depends on the atom’s oxidation state to which the proton may be attached. Acid strength is solvent-dependent. For example, hydrogen chloride is a strong acid in an aqueous solution but is a weak acid when dissolved in glacial acetic acid.

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#SPJ4

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