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schepotkina [342]
3 years ago
14

Which of the following is a key process in the nitrogen cycle?

Advanced Placement (AP)
1 answer:
Alex3 years ago
6 0

Answer:

The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. ... Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification.

Explanation:

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Basically, you can say psychiatrists are trained, medical doctors, While psychologists are not.

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Luiz and Bianca are brother and sister and go to the same school. Luiz walks to school using a footpath, a distance of 900 m, an
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Answer:

Luiz left home first, 10 minutes before arriving time.

Explanation:

We assume that both Luiz and Bianca left the homes and travelled at constant speed. The purpose of this problem is determining who left home first, which is related to time. From Kinematics, both can be represented by the following expression:

\Delta t = \frac{s}{v} (Eq. 1)

Where:

s - Travelled distance, measured in meters.

v - Speed, measured in meters per second.

\Delta t - Time, measured in seconds.

Then, times taken by each person is now calculated:

Luiz (s = 900\,m, v = 1.5\,\frac{m}{s})

\Delta t_{L} = \frac{900\,m}{1.5\,\frac{m}{s} }\times \frac{1}{60}\,\frac{min}{s}

\Delta t_{L} = 10\,min

Bianca (s = 1500\,m, v = 5\,\frac{m}{s})

\Delta t_{B} = \frac{1500\,m}{5\,\frac{m}{s} }\times \frac{1}{60}\,\frac{min}{s}

\Delta t_{B} = 5\,min

If both arrived at school at 8:55 AM, then Luiz left home at 8:45 AM. Luiz left home first, 10 minutes before arriving time.

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