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3 years ago

11

How long it takes a 100 watt light bulb to use 10,000 J of electrical energy?

1 answer:

vlabodo [156]3 years ago

7 0

Answer:

A 100-watt light bulb takes 100 seconds to use 10,000 J of electrical energy.

Explanation:

Power refers to the amount of work done (or energy consumed) per unit of time. It is usually measured in watts (W), which is equal to 1 Joules per second ( $\frac{J}{s}$ )

So, by definition, to calculate the power consumed or supplied in a time interval the following expression is used:

$P=\frac{W}{t}$

where P is the power measured in Watts, W is the work measured in Joules, and t is the time measured in seconds.

In this case:

P=100 Watt
W= 10,000 J
t= ?

Replacing:

$100 Watt=\frac{10,000 J}{t}$

Solving:

$t=\frac{10,000 J}{100 Watt}$

t=100 seconds

<u><em> A 100-watt light bulb takes 100 seconds to use 10,000 J of electrical energy.</em></u>

<u><em></em></u>

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A gas occupies a volume of 650.0 mL when the pressure is 3.50 atm. What will the new volume be if the pressure is reduced to 1.6

Gemiola [76]

The new volume will be 1379 mL.

Explanation:

As per Boyle's law, the product of initial volume and initial pressure of any gas molecule is equal to the product of final volume and final pressure of those molecules.

So here the initial volume is 650 ml and the initial pressure is 3.50 atm. As the temperature is said to be constant, then this system will be obeying Boyle's law. So, the final pressure is given as 1.65 atm. As there is a reduction in the pressure, the volume of the gas is tend to get expanded.

$P_{1} V_{1} = P_{2} V_{2}$

So, $(650*10^{-3}*3.50)=(1.65*V_{2})$

$V_{2} = \frac{650*10^{-3}*3.50}{1.65} = 1379 mL$

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3 years ago

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3 years ago

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alexandr402 [8]

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2 years ago

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Explanation:

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The chemical species which accept proton are called Brønsted-Lowry base.

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$HNO_3$ is Bronsted lowry acid and $NO_3^-$ is its conjugate base.

$H_2O$ is Bronsted lowry base and $H_3O^+$ is its conjugate acid.

(b)

$CN^- + H_2O \rightarrow HCN + OH^-$

$CN^-$ is Bronsted lowry base and HCN is its conjugate acid.

$H_2O$ is Bronsted lowry acid and $OH^-$ is its conjugate base.

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$H_2SO_4$ is Bronsted lowry acid and $HSO_4^-$ is its conjugate base.

Cl^- is Bronsted lowry base and HCl is its conjugate acid.

(d)

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(e)

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3 years ago

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Airida [17]

Answer:

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Explanation:

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