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2 years ago

12

What are the main parts of a simple electrie motor, like the one found inside a remote control car? O a generator, wires, and tu

rbine magnets and coils of wire O electromagnets only

1 answer:

yKpoI14uk [10]2 years ago

4 0

Answer:

A DC power supply, commutator, rotor armature, axle, and a field magnet.

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Even though lead is toxic, lead compounds were used in ancient times as white pigments in cosmetics. What is the percentage of l

Gekata [30.6K]

<u>Answer:</u> The mass percent of lead in lead (IV) carbonate is 63.32 %

<u>Explanation:</u>

The given chemical formula of lead (IV) carbonate is $Pb(CO_3)_2$

To calculate the mass percentage of lead in lead (IV) carbonate, we use the equation:

$\text{Mass percent of lead}=\frac{\text{Mass of lead}}{\text{Mass of lead (IV) carbonate}}\times 100$

Mass of lead = (1 × 207.2) = 207.2 g

Mass of lead (IV) carbonate = [(1 × 207.2) + (2 × 12) + (6 × 16)] = 327.2 g

Putting values in above equation, we get:

$\text{Mass percent of lead}=\frac{207.2g}{327.2g}\times 0100=63.32\%$

Hence, the mass percent of lead in lead (IV) carbonate is 63.32 %

4 0

2 years ago

A plastic 2L soda bottle is flexible enough that the volume of the bottle can change even without opening it. If you have an emp

Aneli [31]

Answer: The new volume be if you put it in your freezer is 1.8 L

Explanation:

To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where,

$V_1\text{ and }T_1$ are the initial volume and temperature of the gas.

$V_2\text{ and }T_2$ are the final volume and temperature of the gas.

We are given:

$V_1=2L\\T_1=25^oC=(25+273)K=298K\\V_2=?\\T_2=-4.0^oC=((-4)+273)K=269K$

Putting values in above equation, we get:

$\frac{2}{298}=\frac{V_2}{269}\\\\V_2=1.8L$

The new volume be if you put it in your freezer is 1.8 L

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2 years ago

As you travel from a solid to a gas, energy is being absorbed or given off?

Wittaler [7]

Sublimation is solid to a gas, during the process of sublimation energy is absorbed.

5 0

2 years ago

when the sum 4.9965 + 2.11 + 3.887 is calculated, to how many decimal places should the answer be reported?

jarptica [38.1K]

Answer:

the correct answer is four decimal places

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2 years ago

What type of wave needs molecules in order to transfer the energy.

ratelena [41]

The answer is heat waves

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2 years ago