The toxic effects of water pollution are generally _______.

1 answer:

7 0

Immediate and long lasting because they pollute the water itself which is the most important commodity for humans. Dirty water gives us all types of diseases which are all long lasting and the body has a immediate reaction to the pollutants in the water. Drinking polluted water or even bathing in it can be very harmful to the human body.

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Frequency is a measure of how many waves pass by in one second. a. true b. false

Elanso [62]

True. Waves are measured in Hz. Wavelength is also measured in metres (m) - it is a length after all. The frequency, f, of a wave is the number of waves passing a point in a certain time. We normally use a time of one second, so this gives frequency the unit hertz (Hz), since one hertz is equal to one wave per second.

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The coordinates 40 degrees north and 100 degrees east falls in what country?

garik1379 [7]

We can find for the country by using a map with angle coordinates. Based on the map that I found online, the country which is located at around 40 degrees north and 100 degrees east is no other than:

China

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A piece of aluminium foil is held between a bar magnet and a paperclip. What will happen to the paper clip?

Nuetrik [128]

Answer:the paper clip will be attracted to the magnet

Explanation:

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3 years ago

Your car burns gasoline as you drive up a large mountain. What energy transformation is the car performing?

Sonja [21]

Your car is performing a transformation of energy of:

Chemical energy to Mechanical energy

The chemical is the gasoline which is then converted to fire as the car runs thus creating the movement of the car which is mechanical energy.

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3 years ago

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What is the net force acting on a falling object when it reaches terminal velocity? a force equal to gravity 9.8 m/s2 two times

Leno4ka [110]

Answer:

The net force is zero

Explanation:

When an object is falling, there are two forces acting on it:

- The force of gravity, which is equal to the weight of the object, which pushes the object downwards

- The air resistance, which acts against the motion of the object, so it pulls upward

While the magnitude of the force of gravity is constant, the magnitude of the air resistance increases as the velocity of the falling object increases: at some point of the motion, the air resistance becomes equal in magnitude to the force of gravity. At this point, the net force on the object becomes zero, and according to Newton's second law, the acceleration of the object becomes also zero:

$F=ma$

But zero acceleration means that the velocity of the object is now constant: this is known as terminal velocity.

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3 years ago