What term is used to describe the 4 in the expression 4 Ca(NO³)²

Answers

Answer 1

Answer: Hello,

The 4 describes the amount of calcium in that compound.

Have A Good Day.

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What is an earthquake?

Answers

an earthquake is when two tectonic plate merge and one snaps up suddenly, causing the plate to shake violently until it settles back into place. hope i helped :3

A 67.0 kg man sits in a 5.0 kg chair so that his weight is evenly distributed on the legs of the chair. Assume that each leg makes contact with the floor over a circular area with a radius of 1.10 cm. What is the pressure exerted on the floor by each leg?

Answers

Final answer:

The pressure exerted by each leg of the chair is calculated by dividing the total weight of the man and the chair (taken as a force) by the total surface area of the chair legs that is in contact with the floor.

Explanation:

To calculate the pressure exerted on the floor by each leg of the chair, we first need to calculate the total weight that the chair legs need to support. The total weight (w) is the weight of the man plus the weight of the chair, where weight is calculated as the mass multiplied by gravity (on Earth this is approx. 9.8 m/s²). So, w = (67.0 kg + 5.0 kg) * 9.8 m/s².

Next, we need to calculate the total area of all the chair legs in contact with the floor. Each leg makes contact over a circular area, the area of which (A) is calculated by 'πr²'. The total area then is 4 times this area (assuming the chair has four legs).

Pressure (P) exerted is the total force (F) applied, divided by the area (A) over which the force is distributed. Therefore the pressure exerted by each leg is the total weight divided by the total area.

Learn more about Pressure calculation here:

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In a nuclear power plant, _____. energy is released from the nuclei of atoms energy is released from the bonds of molecules energy is released from the electrons of atoms energy is stored in the nucleus of atoms

Answers

In a nuclear power plant, energy is released from the nuclei of atoms. The correct option among all the options given in the question is the first option. Huge amount of thermal energy is released by the breaking of the uranium atoms. This energy is used for turning a turbine that produces electricity. It is a very clean method of producing electricity.

Answer: energy is released from the nuclei of atoms

Explanation:

Chemical energy is the energy stored in the bonds of molecules.

Nuclear energy is the energy stored in the nucleus of the atom.

Nuclear power plants use heat produced during nuclear fission to heat water which is produced by the splitting of heavy nucleus into lighter elements by release of energy.

The complete nuclear fission reaction is:

$_(92)^(235)\textrm{U}+_0^1\textrm{n}\rightarrow _(56)^(143)Ba+_(36)^(90)Kr+3_0^1\textrm{n}$

The pain in the leg that is referred to as "shin splints" is often caused by microtears in the periosteum and perforating fibers. These tears lead to inflammation of the periosteum. Considering the type of tissue found in the periosteum, which cells do you think would be most involved in the repair process?

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Answer:

fibroblast cells

Explanation:

Periosteum is thin connective tissue layer covering the bone. It contains fibroblast cells outside and progenitor cells inside. So, the cells most involved in the repair is fibroblast cells. It is typical type of biological cell that synthesizes matrix and collagen, produces the stroma for animal tissues and plays vital role in healing wounds

How much energy is contained in the mass of a 60-kilogram person?

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I could tell you the energy if you can tell me the acceleration and height above earth's surface.

the energy in the body depends on the work that had done and the type of food he she had if it is in a 60 kg person / 40 kg person.

When astronauts travel to the moon, their bodies experience a lower gravitational pull than on Earth. Which type of pull are they experiencing?

Answers

Answer:

The pull the astronauts feel in the moon will be gravitational too.

Explanation:

The pull will be gravitational too because there's a gravitational force exerted by the moon over the astronaut, this force keeps pulling the astronaut towards the moon surface but it's weaker than in earth because the mass of the moon is significantly less that the mass of the earth.

They are experiencing the pull of leaving the atmosphere

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