Answer:
9/5
Explanation:
original fraction : x/y
new fraction = .9x/(.5y)
= 9x/5y
(9x/5y) / (x/y)
= 9x/5y * y/x
= 9/5
= 1.8
so it increased by 80%
e.g suppose we had 100/200 or 1/2
new fraction = 90/100 or 9/10
new ratio = (9/10) / (1/2)
= 9/5
Answer:
The element will be Boron which has 5 electrons in it, and at the atomic nucleus it consists of 5 neutrons and 5 protons.
The lewis electron dot structure for boron will have three dots on the atom.
Which can be represented as · X :
Where X represents the element and dots represents the electrons present in the outermost valence shell.
Boron distributes its 5 electrons in this way, that first shell has 2 electrons and the second shell has 3 electrons.
Explanation:
Hope This Helps
Have A Great Day
~Zero~
Answer:
to join together phrases
Explanation:
A prepositional phrase can be used to modify nouns and verbs. They provide color information in a sentence.
Answer:
An enzyme speeds up a chemical reaction in the cell, but it can only be used once.
Explanation:
<h2>1. Right answer: Observational
</h2>
Kepler formulated the three laws of planetary motion <u>from observations made by</u> the Danish astronomer <u>Tycho Brahe of the orbit of Mars.
</u>
These laws were enunciated to mathematically describe the movement of the planets in their orbits around the Sun. However, the scientific resources existing in his time did not allow him to prove these laws. It was Newton who did it after having developed the Differential and Integral Calculus and formulating the Laws of Universal Gravitation.
<h2>2. Right answer: Aristotelian
</h2>
Aristotle mistakenly thought that the Earth was the center of the universe, thus establishing a <u>geocentric cosmological model.
</u>
According to this model, Aristotle proposed that the universe (the cosmos) was spherical and finite, with the Earth immobile at its center, composed of the four fundamental elements (made up of spherical layers): ground, water, air and fire; and the Sun along with the fixed planets in their respective concentric spheres revolving around the Earth. The outermost sphere being that of the stars and all these external elements being made of a fifth element which he called ether.
