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vichka [17]
3 years ago
15

How much force is required to lift a rock a vertical distance of 8 m if 80 j of work were done

Chemistry
1 answer:
yanalaym [24]3 years ago
5 0

we have

work done (W)= force(F) × displacemen(s)

or, 80= F× 8

or, F= 10 N

therefore, 10 N force is required to lift the rock.

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Suppose a salt and a glucose solution are separated by a membrane that is permeable to water but not to the solutes. the nacl so
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1)

<span>m(NaCl) = 1.95 g
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m(gl) = 9 g
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The osmosis represents the diffusion of solvent molecules through a semi-permeable membrane that allows passage solvent molecules but does not to the dissolved substance molecule. The osmosis occurs when the concentrations of the solution on both sides of the membrane are different. Since the semi-permeable membrane only permeates the solvent molecules, but not the particles of the dissolved substance, it occurs the solvent diffusion through the membrane, i.e. the solvent molecules pass through the membrane to equalize the concentration on both sides of the membrane. Solvents molecules move from the middle with a lower concentration in the middle with a higher concentration of dissolved substances.

In our case, osmosis will occur because the concentration of NaCl solution and the concentration of glucose solution do not have same values. Osmosis will occur in the direction of glucose solution because it has a lower concentration.

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