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kirza4 [7]
3 years ago
6

Melissa wants to separate a mixture of many tiny beads that are all the same size. Some of the beads are made from pine wood and

some of the beads are metal.
What would be the easiest way for her to separate the mixture?

A. Add water and the wooden beads will dissolve.
B. Add water and the wooden beads will float.
C. Sift the beads and the wooden ones will stay on top.
D. Pick out all the wooden beads by hand.
Chemistry
2 answers:
Volgvan3 years ago
5 0

Answer:

Your answer here is B. Add water and the wooden beads will float.

Explanation:

Please mark me as Brainliest! :)

Serjik [45]3 years ago
3 0

B. Add water and the wooden beads will float.
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Liquid water at 325 K and 8000 kPa flows into a boiler at a rate of 10 kg⋅s− 1 and is vaporized, producing saturated vapor at 80
masha68 [24]

Answer:

0.4058

Explanation:

From the steam table

At 325 K, saturated liquid

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For compressed liquid

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Thermal expansion coefficient B = 460 x 10^{-6} K^{-1}

Enthalpy at initial conditions

H1 = Hf + Vf (1-BT)(P1 - P_sat)

= 217 + 1.013*10^-3 (1 - 460*10^{-6})(8000 - 12.87)

= 223.881 kJ/kg

Entropy at initial conditions

S1 = Sf - BVf (P1 - Psat)

= 0.7274 - 460×10^{-6}*1.013*10^-3 (8000 - 12.87)

= 0.724 kJ/kg-K

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H2 = 2759.9 kJ/kg

S2 = 5.7471 kJ/kg-K

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Heat added Q = H_2 - H_1

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= 2536 kJ/kg

Maximum work

W = (H1 - H2) - T (S1 - S2)

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= - 1029 kJ/kg

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