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3 years ago

what common water pollution caused mainly by power plants and factories resulting in the death of many aquatic organisms

1 answer:

7 0

This type of water pollution is known as thermal pollution. Thermal pollution is the release of heat into the environment. In the case of power plants they release heated water into waterways. Water is used in power plants to cool down machinery. As machines operate they release heat so the water is used as a coolant. Releasing heated water into an aquatic ecosystem reduces the oxygen carrying capacity of the water, so less oxygen is available for organisms to use for respiration.

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Explain why the boiling point of water is a characteristic physical property

slava [35]

The boiling point of water is a characteristic physical property, because the water won't boil until it reaches the boiling point.

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3 years ago

Read 2 more answers

Why do we write chemical compounds inside brackets

ch4aika [34]

The square brackets are used in case of complex compounds. This is known as coordination sphere. There is a metal in the coordination sphere and ligands attached to it. This complete set of metals and ligands inside the brackets is complex ion or molecule.

The ions outside this coordination sphere are counter ions of the complex.

It represents that if the complex compound is dissolved in water it will give a complex ion and the counter ion. The atoms in the bracket cannot break there bonds and will remain un-dissociated.

If there is no such bracket then it will represent simple or binary salt.

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3 years ago

In which situation will the friction between the object and surface on which it is moving be increased. A the object is pushed o

aliina [53]

Answer:

C the object is pushed with greater force against the surface

Explanation:

The force of friction between an object and a surface is the resistive force exerted by the surface on the object, due to the roughness of the two surfaces, and that tends to resist the motion of sliding of the object over the surface.

The force of friction exerted on an object over a surface is given by

$F_f=\mu N$

where

$\mu$ is the coefficient of friction, whose value depends on the roughness of the surface

N is the normal reaction exerted by the sutrface on the object

Let's now analyze each statement; here we want the force of friction to be increases:

A the object is pushed over a long distance. --> FALSE, this is independent on the force of friction.

b the weight of the moving object is decreased. --> FALSE: if the weight decreases, the normal reaction decreases, so the force of friction decreases as well.

C the object is pushed with greater force against the surface. --> TRUE: in this case, the normal reaction increases, so the force of friction increases.

D the surface on which the object is moving is made smoother --> FALSE: in this case, the coefficient of friction decreases, so the force of friction decreases.

4 0

3 years ago

while doing a lab, a student found the density of a piece of pure aluminum to be 2.85 g/cm^3. the accepted value for the density

vagabundo [1.1K]

Answer:

Percent error = 5.6%

Explanation:

Given data:

Measured value of density by students = 2.85 g/cm³

Accepted density of aluminium = 2.70 g/cm³

Percent error = ?

Solution:

Formula:

Percent error = [ Measured value - accepted value / accepted value ]× 100

Now we will put the values in formula:

Percent error = [ 2.85 g/cm³ - 2.70 g/cm³ / 2.70 g/cm³ ]× 100

Percent error = [0.15/2.70 g/cm³ ] × 100

Percent error = 0.056× 100

Percent error = 5.6%

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4 years ago

Which evidence indicates the ocean plays a large role in climate change?

Elza [17]

You already gave the answer

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3 years ago