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ElenaW [278]
3 years ago
14

Select all that apply. Select all the items that are public goods or services.

Chemistry
2 answers:
IRINA_888 [86]3 years ago
7 0
Education millitary and police force roads is not a public good or servicev he is wrong
Gekata [30.6K]3 years ago
4 0
All of them are technically a public good or a service because for a public goods it would be all and service it would be all so.... yah
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A

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What set of coefficients will balance the chemical equation: _NaBr (aq) + _H3PO4 (aq) → _Na3PO4(aq) + _HBr (aq)
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The Balanced chemical equation for above reaction will be :

\small{ \mathrm{3NaBr + H_3PO_4 \rightarrow Na_3PO_4 + 3HBr}}

The Coefficients will be :

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30,000 J of heat are added to 23.0 kg of steel to reach a final temperature of 140
kolbaska11 [484]

The initial temperature is 137.34 °C.

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As the specific heat formula says that the heat energy required is directly proportional to the mass and change in temperature of the system.

Q = mcΔT

So, here the mass m is given as 23 kg, the specific heat of steel is given as c = 490 J/kg°C and the initial temperature is required to find with the final temperature being 140 °C. Also the heat energy required is 30,000 J.

ΔT =\frac{Q}{mc}

ΔT =\frac{30000}{23 \times 490} = \frac{30000}{11270} =2.66

Since the difference in temperature is 2.66, then the initial temperature will be

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