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Morgarella [4.7K]
4 years ago
15

QUESTION 3

Biology
2 answers:
Doss [256]4 years ago
6 0
C is the answer. Hydroelectric acid is the formula for HCI
Finger [1]4 years ago
4 0

Answer:

HCl is known as hydrochloric acid. Hence the answer is option B.

Explanation:

Hydrochloric acid is an example of strong acid. This can be completely dissociates into aqua solution. It is also the very common acid used in chemical reactions. It is formed by the fusion of hydrogen atom and chlorine atom. This is formed due to the single substitution of ions.

The molecule has lower value of PH which indicates it as a very strong acid. This add acid is also present in our stomach. This side also helps in proper digestion of food and preservation of the food inside the stomach and it also close all the bacteria which are harmful for the human body

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The Earth takes a year to orbit around the Sun. What about the Moon?
Lesechka [4]

Answer

<em>C. The Moon orbits the Earth about once a month</em>

Over billions of years the earth’s gravitational field has tidally locked the moon in orbit so that its rotation about its axis is the same as that of its orbit around the earth.

This process is still continuing as the earth transfers some of its angular momentum to the moon lifting it to a higher orbit by a couple of centimeters a year. As it rises, its takes a fraction longer to complete an orbit, and its rotational speed slows down slightly to match.

The eventual conclusion of this is that the earth also would become tidally locked to the moon, and they will both face each other permanently. But this is going to take that long that the sun will probably have destroyed both the earth and the moon in its red giant phase before this happens.

<em>Hope this helps!\</em>

<em><u>Please mark brainliest!</u></em>

7 0
3 years ago
Read 2 more answers
Do you have a summative in Grade 9 science?​
sukhopar [10]

Answer:

check with your teacher

3 0
3 years ago
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What are gametes?
solmaris [256]

Answer:

<h3>male and female reproductive cells </h3>

Explanation:

<h3>I hope it helps ❤❤</h3>
6 0
3 years ago
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if you want to conduct a research study about your favorite restaurant in town,what method of qualitative research is appropriat
iogann1982 [59]

Answer:

People that like the restaurant

Explanation:

In order to judge the feeling of the town, you should take into aspect what other people think of it, and since the people's numbers change, it would be good use to measure some aspects

7 0
3 years ago
What do scientists use to mark boundaries in the geologic time scale?
tekilochka [14]

Era is used to mark the boundaries of geological time scale by using radio carbon dating technique.

Explanation:

Geological time starts with Precambrian time.

Geologically, time is divided between the Precambrian era and present time into era.

The three eras are Paleozoic era, Triassic period and Cenozoic era.

Era is further divided into periods.

Scientists use radio carbon dating to study fossils and rock formation. With this study they were able to divide them in exact geological scale.

Geologic scale is the record of events in earth's history and evolution.

3 0
3 years ago
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