Technically A and B, but A is more true, so it is the 'correct' answer.
Answer:
A. The poles are opposite
Explanation:
Magnets are object that produce magnetic fields, which are regions of space that exert a forces on charged particles in motion or on other magnets.
Every magnet has 2 opposite poles, which are labelled by convention as North Pole and South Pole; the lines of the magnetic field of a magnet go out from the North Pole and go into the South Pole.
Magnetic poles always exist in pair: it means, every magnet always contains a North Pole and a South Pole. If a magnet is cut in a half, each half of the magnet will still have a North Pole and a South Pole.
Each pole exerts a force on another pole; in particular, we have:
- Like poles (north-north or south-south) repel each other
- Opposite poles (north-south) attract each other
In this problem, a magnet is attracted to a metal object: this means that the two poles must be of opposite polarity. Therefore, the correct option is
A. The poles are opposite
The following goal the U. S. Integrated Ocean Observing System (IOOS) is not intended to address is to promote ocean ownership.
<h3>What is the Integrated Ocean Observing System?</h3>
The United States' Integrated Ocean Observing System, is a network of people and technology.
It collaborates to collect and transmit data on our coastal waters, Great Lakes, and seas.
Some of its work is gathering data in the ocean, while others are on land or in space.
Thus, the correct option is C, which promotes ocean ownership.
Learn more about Ocean Observing System, here:
brainly.com/question/1565876
Answer:
Ventilation and mixing outdoor air with indoor air
Explanation:
Answer:
c
Explanation:
Random distribution of the Isopods should be 50/50 in A and B.
Chi-square = 
where O = observed frequency and E = expected frequency
Chamber O E Chi-square
A 18 10 
= 6.4
B 2 10 
= 6.4
<em>Total Chi-square </em>= 6.4 + 6.4 = 12.8
<em>Degree of freedom</em> = 2 - 1 = 1
<em>Tabulated Chi-square</em> (α = 0.05) = 3.8415
The calculated Chi-square exceeds the critical value, hence, it is significant and not due to random.
<em>The correct option is </em><em>c</em><em>.</em>
