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4 years ago

What are all the ways scientists do investigations

Chemistry

2 answers:

mixas84 [53]4 years ago

7 0

Scientists use tools to investigate and prove thier answers

brilliants [131]4 years ago

4 0

To find evidence and prove their answer

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Hey guys I really need help here, please answer this! I'd be most grateful :)

djverab [1.8K]

Answer:

See Explanation

Explanation:

Positrons are often called positive electrons. They have the same mass and magnitude of charge as the electron but are of opposite sign. This means that they are positively charged while electrons are negatively charged.

In positron emission, a proton is converted into a neutron and a positron. The anti neutrino is a particle that balances the spins.

In electron capture, an electron is converted to a neutron. The anti neutrino is a particle that balances the spins.

When transmutation occurs by positron emission, the mass number of the of the parent nucleus is the same as mass number of the daughter nucleus but the atomic number of daughter nucleus decreases by 1 while the neutron/proton ratio increases.

When transmutation occurs by electron capture, the mass number of the of the parent nucleus is the same as mass number of the daughter nucleus but the atomic number of daughter nucleus decreases by 1 while the neutron/proton ratio increases.

7 0

3 years ago

A satellite dish is being designed so that it can pick up radio waves coming from space. The satellite dish will be in the shape

pychu [463]

Answer:

the base of the satellite should be positioned at (0,20)

the best model which describes the equation of the satellite is $\mathbf{y = \dfrac{x^2}{80} + 20}$

Explanation:

From the information given:

A satellite dish is designed in such a way that it can pick up radio waves coming from the space.

This satellite dish is designed in the shape of a parabola.

Location of the satellite is situated above the ground

Focus of the satellite is 40 ft above the ground

Using the ground as the x - axis

The objective here is to determine where should the base of the satellite be positioned? &

Which equation best describes the equation of the satellite?

Using the ground as the x - axis;

Let say the x- axis start from the origin (0,0)

Then;

The Focus of the satellite which is 40 ft above the ground will be (0,40)

The position of the base of the satellite will be the vertex (h,k) which is at an equidistant position between the ground and the focus.

(h,k) = (0,20)

The model which best describes the equation of the satellite is as follows :

$(x - h)^2 = 4a(y - k) \\ \\ where ; \\ \\ (h,k) = (0,20) , \\ a = 20(x - 0)^2 = 4(20)(y - 20)\\ \\x^2 = 80( y - 20)\\ \\x^2= 80y - 1600\\ \\y = \dfrac{x^2}{80} + 20$

4 0

3 years ago

The pH of a solution is 2.0. Which statement is correct?

mamaluj [8]

Answer:

pH + pOH = 14, [H₃0⁺] [0H⁻] = 10⁻¹⁴

Explanation:

When it comes to questions involving pH, the equations used are;

[H₃0⁺] [0H⁻] = 10⁻¹⁴

This equation shows the concentration of hydroxonium ions alongside that of the hydroxide ions.

pH + pOH = 14

If the value of either the pH of the pOH is know,one can calculate the value of the other using this equation.

4 0

3 years ago

Why do we need an isolated system for the law of conservation of mass to be true?

Tanya [424]

Explanation:

well an isolated system is one which is impervious to the floor of both matter and energy so to prove the conservation of mass we have to find a way to keep a constant mass in the confined space

8 0

4 years ago

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What part of a cell regulates the movement of materials in and out of the cell

goblinko [34]

I. plasma membrane - It surrounds the cell and has three major functions: ... It regulates the movement of substances into and out of the cell. It is referred to as being selectively permeable because it allows or prevents certain substances to enter and leave the cell.

4 0

3 years ago

Read 2 more answers