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Firlakuza [10]
3 years ago
6

What type of electric cell would be best in a flashlight or smoke detector? Explain each choice

Chemistry
2 answers:
Serhud [2]3 years ago
4 0

Flashlight or smoke detector have simple dry cell or batteries.

The cell are generally of 6 volts.

In these cells Zn acts as anode and  graphite electrode acts as cathode.

A mixture of MnO2 and carbon blacks surrounds the graphite cathode

The electrolyte is ZnCl2 and ammonium chloride. This mixture is used as thick paste.


nataly862011 [7]3 years ago
4 0

Answer:The best electric cells for a flashlight is the rechargeable alkaline battery and the 9v rechargeable lithium batteries in smoke detector.

Explanation:

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A chemical reaction must occur for a compound to have different properties.
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-BARSIC- [3]

Answer:

Half life is 6 years.

Explanation:

T½ = In2 / λ

Where λ = decay constant.

But N = No * e^-λt

Where N = final mass after a certain period of time

No = initial mass

T = time

N = 0.625g

No = 10g

t = 24 years

N = No* e^-λt

N / No = e^-λt

λ = -( 1 / t) In N / No (inverse of e is In. Check logarithmic rules)

λ = -(1 / 24) * In (0.625/10)

λ = -0.04167 * In(0.0625)

λ = -0.04167 * (-2.77)

λ = 0.1154

T½ = In2 / λ

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The half life of radioactive cobalt-60 is 6 years

5 0
3 years ago
Which surface ocean current has the warmest water.
SOVA2 [1]
Which surface ocean current has the warmest water.
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1 point If the boy is pushing with 50N of force and the static friction resistance is 70N of force, what will happen? *​
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The coefficient of performance (cop) of a refrigerator is defined as the ratio of?
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The usable heating or cooling delivered to work required ratio, also known as the coefficient of performance, or COP, of a heat pump, refrigerator, as well as air conditioning system. Higher efficiency, less energy (power) usage, and thus reduced operational costs are all related to higher COPs.

Coefficient of performance formula:

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It is refrigeration's coefficient of performance (COP) will always be greater than 1.

Therefore, the coefficient of performance (cop) of a refrigerator is defined as the ratio of " the work necessary to heat or cool something usefully."

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