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Physics

1 answer:

aleksandrvk [35]4 years ago

5 0

As the gas is cooled, it will make a phase transition from gas into liquid, and upon further cooling from liquid to solid (ie. freezing). Some gases, such as carbon dioxide, skip the liquid phase altogether and go directly from gas to solid.

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Explain why a clothes iron with a metal base must be connected to the mains by a three-core cable.

Lapatulllka [165]

The charge going to the clothes iron needs to be grounded so the iron does not make any shock

3 0

3 years ago

How much energy in joules does it take to raise the temperature of 1.5kg of aluminum from 20 degrees Celsius to 40 degrees Celsi

masya89 [10]

Q = m * c * ΔΤ
ΔΤ = 40-20 = 20

Q = 1.5kg * 0.9 * 20
Q = 27J

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3 years ago

An object with a mass of 3.0kg has a force of 9.0 newtons applied to it. What is the resulting acceleration of

Sindrei [870]

Answer:

The acceleration is: $a=3 \frac{m}{s^2}$

Explanation:

To answer this, we need to recall Newton's Second Law of motion, that states that an object of mass m would accelerate (change its state of uniform motion) proportional to the force (F) that is applied , and exemplified by the following equation:

$F=m\,a$

From here, and using the given values for mass (m = 3 kg) and force (F = 9 N), we can derive the value of the acceleration as shown below (notice that since all quantities are given in SI units, the resulting acceleration will also be in Si units ( $\frac{m}{s^2}$ ):

$F=m\,a\\9\,N=3\,kg\,a\\a=\frac{9}{3} \frac{m}{s^2} \\a=3 \frac{m}{s^2}$

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4 years ago

If the sun suddenly ceased to shine, how long would it take earth to become dark? you will have to look up the speed of light in

sleet_krkn [62]

We are 8 light minutes from the sun. That means two things, we see the sun as it was 8 minutes ago, and we WOULD continue to see the sun for 8 minutes after it disappeared.

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3 years ago

Calculate the mechanical advantage of a lever that has an input force of 15 N and an output force of 60 N. *

andreev551 [17]

Answer:

Explanation:

Mechanical Advantage is given as a ratio of the force a machines gives out to the force that it receives.

Simply put, it is the ratio of output force to input force:

$MA = \frac{OF}{IF}$