T
F
to the start line again. What is the horses displacement?
A. 0 m
B. 300.0 m counterclockwise
C. 300.0 m counterclockwise
D. 600.0 m
Answer:
A 0m
Explanation:
The horse runs clockwise round the strack, then goes back to the start line ending up back at the same place when it started.
B. -2
C. +2
D. +1
When a potassium atom loses one electron, it forms a potassium ion. Since electrons carry a negative charge, losing one electron results in an overall positive charge for the ion. Therefore the correct answer is (D).
A potassium atom normally has 19 protons and 19 electrons. The number of protons and electrons is equal, so the atom is electrically neutral overall.
However, when a potassium atom loses one electron, it means that it now has 19 protons and only 18 electrons. Since protons are positively charged and electrons are negatively charged, losing one negatively charged electron leaves the atom with a net positive charge.
Since there is one more positive charge than a negative charge, the potassium ion has a positive charge of +1. This means the potassium ion has one more positive charge than it has negative charges, making it a cation with a +1 electrical charge.
In summary, when a potassium atom loses one electron, it becomes a potassium ion with a positive charge of +1. Therefore the correct answer is (D).
To know more about the potassium atom:
#SPJ6
4. a prediction
Explanation:
According to the scientific method, an experiment is conducted to test a prediction/hypothesis stemming from the previous question.
A conclusion ... usually called a "theory" ... is tested. (3)
One great way to test a conclusion is to follow up on its predictions, and see how they turn out.
kinetic energy because the bird is in motion
Answer;
The above statement is true
Human impact on one system leads to changes in more of Earth’s systems.
Explanation;
Events can occur naturally, such as an earthquake or a hurricane, or they can be caused by humans, such as an oil spill or air pollution. An event can cause changes to occur in one or more of the spheres, and/or an event can be the effect of changes in one or more of Earth's four spheres.
Human impact on one system leads to changes in more of Earth’s systems because things like carbon and methane emissions affect the environment, which affects all plant and animal life.
The statement "Human impact on one system leads to changes in more of Earth’s systems." is a true statement. This is further explained below.
The Earth's five systems
combine to create the surroundings we know.
In conclusion, These systems are on a balance to maintain human existence, meaning that if there is a disruption to one there is a disruption to all.
Read more about Earth