Answer:
Their atomic theory of the elements
Step-by-step explanation:
The ancient Greeks believed that all matter consisted of four elements — earth, air, fire, and water
Everything on Earth consisted of these elements in different combinations.
Robert Boyle is best known for his famous Law — p₁V₁ = p₂V₂.
However, he was also an excellent chemist who did many experiments.
He found it was impossible to combine the four Greek elements into any substance.
Boyle found he could decompose many substances into simpler substances, but none of them was a Greek element.
He therefore rejected the Greek theory.
Almost 150 years before Dalton's atomic theory, Boyle proposed a new definition of an element:
An element is any substance that cannot be broken into a simpler substance.
Its a square, so all the sides are equal. Also, since the area of a square (rectangles) is equal to the height times the length, which are both the same, the area of the square is equal to x², where x is the length of any one side of the square, x²=256. now you square root both sides of that equation, x=√256, and the square root of 256 is 16.
Tl;Dr: each side is 16 feet long.
Answer:
a = 30°
Step-by-step explanation:
We need to find the value of a.
We know that, a straight line makes an angle of 180°.
In this case,
a+3a+2a = 180
6a = 180
a = 30°
So, the value of a is equal to 30°.
Answer:
see explanation
Step-by-step explanation:
Given that y is inversely proportional to x then the equation relating them is
y = 
← k is the constant of proportionality
To find k use the condition that y = 7, x = 9
k = yx = 7 × 9 = 63, thus
y = 
← equation of proportion
When x = 21, then
y = 
= 3
The best and most correct answer providedfrom your question about the entrance examination paper is the second option which is 2,250. The problem can be solved by:
3-1-1 : 5c3*5c1*5c1 *3!/2! = 750
<span>2-2-1 : 5c2*5c2*5c1 *3!/2! = 1500
</span>
Adding the two answers:
750 + 1500 = 2250
I hope it has come to your help.
