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arsen [322]
3 years ago
15

Earth's magnetic field is generated by

Physics
2 answers:
evablogger [386]3 years ago
6 0
The movement of electrical charges inside the earth
qwelly [4]3 years ago
5 0

Answer:

Explanation:

The magnetic field, is generated by electric currents due to the motion of convection currents of molten iron in the Earth's outer core : these convection currents are caused by heat escaping from the core, a natural process called a geodynamo.

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Describe 1 way to reduce the shortage of food for a growing human population.
alexira [117]

The answer is; producing genetically modified organism


GMOs have been shown to produce varieties of organisms that have increased yields and  are resistant to the upsets of climate change and diseases. GMOs are made by introducing genes into an organism that will confer particular desired traits such as disease and drought resistance.


5 0
3 years ago
Where does matter come from?
Pie
The Big Bang theory is matter and energy in the universe exploded out from one point. As the explosion occurred, energy and matter spread outward and formed the universe. The matter from the Big Bang formed clouds of gas.
8 0
3 years ago
Why don't atoms get too close?
Lera25 [3.4K]

Answer:

I would have to go with A, or maybe....yea A

3 0
2 years ago
Read 2 more answers
Light-rail passenger trains that provide transportation within and between cities speed up and slow down with a nearly constant
Elena L [17]

Answer:

19 m/s

Explanation:

The complete question requires the final speed to be calculated.

Velocity is the rate and direction at which an object moves. Acceleration is the rate of change of velocity per unit time and can be calculated by the difference in velocity over a given time.

For this question, first the unknown acceleration must be calculated and used to determine the final velocity

Step 1: Calculate the acceleration

a=\frac{v_{2}-v{1}}{t_{1}}

a=\frac{11-7}{8}

a=\frac{4}{8}

a=0.5 m/s^{2}

Step 2: Calculate the velocity using the acceleration calculated above

a=\frac{v_{3}-v{2}}{t_{2}}

0.5=\frac{v_{3}-11}{16}

v_{3}=19 m/s

3 0
3 years ago
How does the intensity of a sound wave change if the distance from the
Alex17521 [72]

Answer:

The new intensity decreases by a factor of 16.

Explanation:

The intensity of sound wave is given by :

I=\dfrac{P}{A}

P is power

A is area

I=\dfrac{P}{4\pi r^2}

or

I\propto \dfrac{1}{r^2}, r is distance from the source

If the distance from the  source is increased by a factor of 4, r' = 4r

So,

I'=\dfrac{1}{r'^2}\\\\I'=\dfrac{1}{(4r)^2}\\\\I'=\dfrac{1}{16}\times \dfrac{1}{r^2}\\\\I'=\dfrac{I}{16}

So, the new intensity decreases by a factor of 16.

8 0
3 years ago
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