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3 years ago

A teacher moves a box of books weighting 25lbs a distance of 40ft. How much work has she done?

Chemistry

1 answer:

svp [43]3 years ago

6 0

Answer:

$workdone = weight \: \times \: distance \\ = 25 \times 40 \\ = 1000 \: lbsft \\ or \\ = 1000 \: joules$

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How much potential energy an object has depends on the object

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3 years ago

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2 years ago

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A piece of iron can change in different ways. How is iron bending different from iron rusting

fenix001 [56]

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3 years ago

You can practice converting between the mass of a solution and mass of solute when the mass percent concentration of a solution

vfiekz [6]

Answer:

450. g of 0.173 % KCN solution contains 779 mg of KCN.

Explanation:

Mass of the solution = m

Mass of the KCN in solution = 779 mg

Mass by mass percentage of KCN solution = 0.173%

$(m/m)\%=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100$

$0.173\%=\frac{779 mg}{m}\times 100$

$m=\frac{779 mg}{0.173}\times 100= 450,289 mg$

1 mg = 0.001 g

m = 450,289 mg × 0.001 g = 450.289 mg ≈ 450. g

450. g of 0.173 % KCN solution contains 779 mg of KCN.

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3 years ago

Which is the most reactive metal

Lena [83]

The most reactive metal on the periodic table is Francium, However, Francium is an artificial element and only minimal quantities have been produced, so for all practical purposes, the most reactive metal available is Cesium, in the alkali metal family.

ANSWER In theory, Francium, in practice the Cesium

$\textbf{Spymore}$

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3 years ago