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Luda [366]
3 years ago
8

When the potential difference across a lamp is 3.3V the current is 0.15 calculate the resistance of the lamp and give the unit

Chemistry
1 answer:
marissa [1.9K]3 years ago
6 0

Answer:

22Ω

Explanation:

Given parameters:

Potential difference  = 3.3V

Current  = 0.15A

Unknown:

Resistance  = ?

Solution:

According to ohm's law, potential difference, current and resistance are related by the expression below;

             V = I R

where V is the voltage

           I is the current

          R is the resistance

          3.3 = 0.15 x R

             R = \frac{3.3}{0.15}   = 22Ω

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By making several measurements with the same balance, a chemist obtained values of 5.224 g, 5.235 g, and 5.259 g for the mass of
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Accuracy is the proximity of the data to the value considered as real, in this situation we do not know the real value and we do not know if the data is accurate or not, so we can discard options b and d.

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The measure of how closely a set of measurements are to each other is the best definition for which of the following terms. a er
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3 years ago
Relate dark matter to the development of the universe after the Big Bang. In 3-5 sentences, speculate on how the development of
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Answer:

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6 0
3 years ago
When 45 g of an alloy, at 25oC, are dropped into 100.0 g of water, the alloy absorbs 956 J of heat. If the final temperature of
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Answer:

The answer to the question is

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Explanation:

To solve this, we list out the given variables thus

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Thus we have

ΔH = m·c·(T₂ - T₁) where  ΔH = heat absorbed by the alloy = 956 J, c = specific heat capacity of the alloy and T₁ = Initial temperature of the alloy = 25 °C , T₂ = Final temperature of the alloy = 37 °C  and m = mass of the alloy = 45 g

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