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poizon [28]
3 years ago
10

What is the answer to 4z^2-z^2?​

Biology
1 answer:
Ainat [17]3 years ago
4 0

Answer: 3z^2

Explanation:

Step 1: 4z^2-z^2

Step 2: subtract z^2 from 4z^2

Step 3: The answer is 3z^2

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Plz help its for a big grade <br>needs at least (10 sentences)!!!!!​
ICE Princess25 [194]

Answer:

Atom, smallest unit into which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element. As such, the atom is the basic building block of chemistry.

Atom: has equal number of +ve charge (protons) and -ve charge electrons and hence atom has charge.

Neutrons (having no charge) and protons are present in nucleus. Electrons keep revolving around the nucleus in different shells.

4 0
3 years ago
Mars facts and talk about mars
Nataliya [291]

Answer:

Mars is a planet. It is the fourth planet from the Sun. It is the next planet beyond Earth. Mars is more than 142 million miles from the Sun. The planet is about half the size of Earth. A day on Mars is 24.6 hours. A year on Mars is 687 Earth days. Mars is known as the Red Planet. It is red because the soil looks like rusty iron. Mars has two small moons. Their names are Phobos and Deimos.

1) Named after the Roman God of war, Mars is the fourth planet from the sun in our solar system.

2) Mars is also known as the ‘Red Planet’ because, well, it’s red! This signature colour comes from the large amount of a chemical called iron oxide (or ‘rust’ as you might know it) in its rocks and soil.

3) Mars is the second smallest planet in the solar system after Mercury. With a diameter (distance through the middle) of 6,791 kilometres, it’s roughly half the size of Earth.

4) It can get pretty cold on Mars –– much colder than our own planet, since it’s further away from the sun. At the equator, temperatures can reach 20°C, but at its poles they can plummet to as low as -140°C.

5)  Mars is home to the highest mountain in our solar system –– a volcano called Olympus Mons. Standing a whopping 24 kilometres high, it’s about three times the height of Mount Everest!

6)You could jump around three times higher on Mars than you can on Earth. This is because the planet’s gravity – the force that keeps us on the ground – is much weaker.

Hope it helps!!!!

Mark it as brainliest!!

6 0
3 years ago
Read 2 more answers
You discover a new type of gland associated with the skin. Chemical analysis of the product shows a secretion has a pH of 4, con
vagabundo [1.1K]
<h2>A) option is correct </h2>

Explanation:

Skin has two types of sweat glands: eccrine and apocrine

Eccrine glands occur over most of the body and open directly onto the surface of skin whereas apocrine glands open into the hair follicle, leading to the surface of the skin and develop in areas abundant in hair follicles, such as on scalp, armpits and groin

The eccrine gland is controlled by the sympathetic nervous system and regulates body temperature

In some animals, when internal temperature rises the eccrine glands secrete water to the skin surface, where heat is removed by evaporation

Eccrine glands when active are considered major thermoregulatory devices

Smaller mammals, such as rodents, cannot endure dehydration and hence possess no eccrine glands at all

3 0
3 years ago
Use the drop-down menus to determine which type of white blood cell is described below.
Naddika [18.5K]

Answer:

activate memory cells is lymphocytes

engulf and digest pathogens is phagocytes

and produce antibodies is lymphocytes

Explanation:

8 0
3 years ago
Which labels best complete the flow chart?
julsineya [31]

Answer:

The labels that best complete the flow chart are:

X: Free nitrogen is in the atmosphere and Y: Producers captivate components of nitrogen via their roots.

Explanation:

Soil comprises nitrogen, it is taken up by the plants accompanied by other minerals in the process of taking water from the soil. The presence of nitrogen in the soil takes place by the process of decomposition of decaying and dead substances. The process of decomposition dissociates nitrogen and discharges it within the soil. This nitrogen is eventually taken up by the plants.  

Label X shows that in the air presence of nitrogen takes place in its free state, as it is one of the gases found in abundance in the atmosphere of the Earth.  

5 0
3 years ago
Read 2 more answers
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