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3 years ago

A student makes measurements to calculate the density of a rod of aluminum to be

Chemistry

1 answer:

natita [175]3 years ago

3 0

Answer:

20.7%

Explanation:

Percentage error = (difference in measurement ÷ real measurement) x 100%

= (3.26 - 2.70)/2.70 x 100%

= 0.56/2.7 x 100%

= 0.2074 x 100% = 20.74%

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4 years ago

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3 years ago

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3) If an electrical appliance has 150.0 V applied causing a current of 2.34 amps, what is the

eimsori [14]

The resistance of the appliance is 64.1 Ω.

<u>Explanation:</u>

As per the Ohm's law, which states that the electric current is in direct proportion to the voltage and is in inverse proportion to the resistance. It is given by the expression as,

V = IR

Where V is the voltage (V) = 150.0 V

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$$ R = \frac{150}{2.34}$

= 64.1 Ω

So the resistance of the appliance is 64.1 Ω.

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4 years ago