Answer:
The angle at which the light from the ray box strikes the mirror
Explanation:
The independent variable is the variable that the investigator changes. The question states that Alice "changed the angle at which the light from the ray box struck the mirror."
The light box and the direction of the ray are wrong. They are controlled variables.
The angle of the reflected light is wrong. It is the dependent variable.
At the core of the sun, it can be more than 27 million degrees Fahrenheit (15 million degrees Celsius).
From the core, energy moves to the radiative zone, where it bounces around for up to 1 million years before moving up to the convective zone, the upper layer of the sun's interior. The temperature here drops below 3.5 million degrees F (2 million degrees C). Large bubbles of hot plasma form a soup of ionized atoms and move upwards to the photosphere.
<http://www.space.com/17137-how-hot-is-the-sun.html>
Answer:
a) Structural formula for X and Y are attached below,
b) Systematic name of alcohol is Butan-2-ol.
c) X is secondary alcohol.
Explanation:
Alcohols are considered one of the most important class of organic compounds. They act as the starting materials in many important reactions like in synthesis of esters, ethers e.t.c.
Among different reactions shown by alcohols oxidation reactions are considered very important in formation of other intermediates like ketones, aldehydes and carboxylic acids.
Below are the oxidation reactions shown by different alcohols;
1) Primary Alcohol -------[O]--------> Aldehyde --------[O]--------> Carboxylic Acid
2) Secondary Alcohol --------[O]--------> Ketone -------[O]-------> No Reaction
3) Tertiary Alcohol ---------[O]---------> No reaction
Hence, oxidation takes place on alcohols which contain reactive C-H bonds. Therefore, in given scenario the alcohol is secondary alcohol and upon oxidation it produces a ketone.
Note:
In order to finalize the correct structure of final product we can assume that it is ketone because it is stated in statement that it cannot be oxidized further. Secondly the molar mass 72 g/mol was utilized to reach the final correct structure, for this purpose 28 amu (for CO carbonyl group) was subtracted from 72 and the remaining 44 amu was alloted to 2 CH₃ (Methyl part each having 15 amu mass) and CH₂ (Methylene part having 14 amu mass) respectively.