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3 years ago

An electrical company charges 15 p per unit of energy (kWh).

Chemistry

1 answer:

Alja [10]3 years ago

4 0

Answer:

180 p

Explanation:

Energy refers to the capacity of doing work.

Amount charged by an electrical company = 15 p per unit of energy (kWh)

As 1 W = 1000 kW,

$500W=\frac{500}{1000}kW=0.5\,kW$

Also, 1 day = 24 hours.

Cost of running a 500 W freezer = 0.5 kW freezer for 1 hour = $15\times 0.5=7.5\,p$

Therefore,

cost of running a 0.5 kW freezer for a day ( 24 hours ) = $7.5\times 24=180\,p$

Amount charged by an electrical company = 15 p per unit of energy (kWh)

As 1 W = 1000 kW,

$500W=\frac{500}{1000}kW=0.5\,kW$

Also, 1 day = 24 hours.

Cost of running a 500 W freezer = 0.5 kW freezer for 1 hour = $15\times 0.5=7.5\,p$

Therefore,

cost of running a 0.5 kW freezer for a day ( 24 hours ) = $7.5\times 24=180\,p$

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4 years ago

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There are on average 43 g of sugar and 355 mL can of soda please calculate the molarity of sugar in the can of soda the molar ma

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Explanation:

Given :

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Amount of solvent -soda = 355-mL

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3 years ago

You have collected a tissue specimen that you would like to preserve by freeze drying. To ensure the integrity of the specimen,

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Answer:

The maximum pressure is 612.2 Pa

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The pressure of the ice (P1) = 624 Pa

The temperature of the ice = 273.16 K

The maximum temperature the specimen = - 5 oC

= -5 + 273 = 268K

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P1 / T1 = P2 / T2

P2 T1 = P1 T2

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The maximum pressure at which drying can be carried out is 612.2 Pa

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