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3 years ago

Which force was the first to be discovered?

Chemistry

2 answers:

EleoNora [17]3 years ago

7 0

Answer:

A. Gravity

Explanation:

because Isaac Newton published a comprehensive theory of gravity in 1687. Though others had thought about it before him, Newton was the first to create a theory that applied to all objects, large and small, using mathematics that was ahead of its time.

babymother [125]3 years ago

6 0

Answer:

Gravity

Explanation:

Sir Isaac Newton was an English mathematician and mathematician and physicist who lived from 1642-1727. The legend is that Newton discovered Gravity when he saw a falling apple while thinking about the forces of nature.

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815 yd to km (need 3 sig fig)

SpyIntel [72]

Answer: The correct answer is 0.745 km

Explanation:

We are given:

A numerical value of 815 yards

To convert this into kilometers, we use the conversion factor:

1 km = 1093.6 yards

Converting the given value into kilometers, we get:

$\Rightarrow 815yd\times \frac{1km}{1093.6yd}=0.745km$

Hence, the correct answer is 0.745 km

5 0

3 years ago

What is the molecular formula of a compound if it’s empirical

snow_lady [41]

Depends on what compound we’re talking about here

4 0

3 years ago

Mention the significance of dams and irrigation canals?

GarryVolchara [31]

Significance of dams and canals are :- 

Water is stored in dams that are built across rivers. The water is then supplied to nearby towns and cities through pipelines

Water for agricultural purposes is supplied through a system of irrigation canals

hope it helps ~

3 0

2 years ago

The state of matter represented on the right (letter D) has the

jek_recluse [69]

Answer:

A is the answer.

Explanation:

gorgeousness

5 0

2 years ago

The wave mechanical model of the atom is required to explain the

dlinn [17]

The wave-mechanical model of the atom is required to explain the spectra of elements with multi electron atoms.

Explanation:

Wave mechanical theory say that every electron surrounding a nucleus occupies a certain orbit and moves in a certain direction, but the orbit is like a wave of energy or cloud but not a ring. It was proposed in the 1920s, when scientists Erwin Schrodinger and Louis Victor de Broglie concluded that the Bohr’s model is not suitable for electron location determination.

Based on many assumptions, scientists began to guess as accurately as possible about the behaviour of electrons at different energy levels around the nucleus. Because all electrons are negatively charged, they tend to push their elbows when they are too close together, moving away and changing direction. Each plane has one or more orbits that have more than one electrons that move around the nucleus in a specific patterns or shape.

7 0

3 years ago