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Shkiper50 [21]
3 years ago
6

Water in an old building tested recently, showed high copper and iron content, and low pH levels. A water reading taken 20 years

before, showed low pH levels and only minimal traces of copper and iron. If none of the new buildings on the same street showed signs of metallic contaminants, but all reported lower than normal pH readings, how might these readings be explained? (where could the metal come from?)
Advanced Placement (AP)
1 answer:
Annette [7]3 years ago
8 0

Answer:

The older buildings have older pipes. When the pipes get older, they get rusty and corroded. The rusty and corroded pipes release the cooper and iron contaminants into the water supply of the old building. The newer buildings have newer pipes, so there is no copper or iron in trace because the pipes have not rusted or corroded due to age.

Explanation:

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user100 [1]

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Explanation:

Each tree requires 20 L of water per day for 180 days.

Each tree therefore requires;

= 20 * 180

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There are 900 trees to be grown;

= 900 * 3,600

= ‭3,240,000‬ L of water are required for 900 trees.

7 0
3 years ago
An Incident Commander's scope of authority is derived from existing laws, agency policies, and/or ______. A. Outgoing Incident C
lana [24]

Answer:

Option D is the right answer

Explanation:

An Incident Commander's scope of authority is derived from existing laws, agency policies, procedures, and/or through a delegation of authority from the agency administrator or elected official.

Within his/her scope of authority, the Incident Commander establishes incident objectives, then determines strategies, resources, and ICS structure based on the incident objectives.

The incident commander is the person responsible for all aspects of an emergency response; including quickly developing incident objectives, managing all incident operations, application of resources as well as responsibility for all persons involved.

The role of incident commander may be assumed by senior or higher qualified officers upon their arrival or as the situation dictates. Even if subordinate positions are not assigned, the incident commander position will always be designated or assumed.

4 0
4 years ago
Read 2 more answers
2. Choose a product you're familiar with, and then write answers to the following.
stiv31 [10]

Choose a product you're familiar with, and then write answers to the following.

a. Give an example of natural capital that is used to make this product. (Complete

sentences are not necessary. 2.0 points)

b. Give an example of human capital that is used to make this product. (Complete

sentences are not necessary. 2.0 points)

6 0
3 years ago
I NEED ASAPPP In the context of the passage as a whole, the narrator is best described as a reader who
tino4ka555 [31]

Answer:the answer is b

Explanation:

This is the right one

5 0
3 years ago
1. Pillin ang titik sa hanay B na kaugnay ng konsepto nasa Hanay A. Isulat ang titik ng wastong sagot bago ang bilang. (5puntos)
Ainat [17]

Answer:

1. B

2.A

3.D

4.E

5.C

Explanation:

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3 0
3 years ago
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