They include mercury, lead, sulfur dioxide, nitrogen oxides, particulates, and various other heavy metals. Health impacts can range from asthma and breathing difficulties, to brain damage, heart problems, cancer, neurological disorders, and premature death

7 0

2 years ago

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Johannes Keller’s theory was based upon analysis of planet observations taken by tycoon Brahe

Lunna [17]

I would say The answer is false

3 0

2 years ago

How long will it take a cyclist to accelerate to 12 m/s starting from rest if he rides with an average acceleration of 1.2 m/s^2

igor_vitrenko [27]

Answer:

<em>The cyclist takes 10 seconds to accelerate to 12 m/s.</em>

Explanation:

<u>Constant Acceleration Motion</u>

It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:

$v_f=v_o+at$

Solving for t:

$\displaystyle t=\frac{v_f-v_o}{a}$

The cyclist starts from rest (vo=0) and moves at vf=12 m/s with an acceleration $a=1.2\ m/s^2$ .

Calculate the time:

$\displaystyle t=\frac{12-0}{1.2}$

$\displaystyle t=\frac{12}{1.2}$

$\boxed{t=10\ sec}$

The cyclist takes 10 seconds to accelerate to 12 m/s.

3 0

2 years ago

What physical property of Earth gives rise to the seasons?

Elza [17]

Answer:

Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.

Explanation:

8 0

2 years ago