9. A calculate the minimum valu
turn a beam of light by total internal reflection through 90°
D. 1.20 E. 4.11
A wave of frequency 75Hz form a stationary pattern in a medium where the distan
between adjacent nodes is 2.0cm. What is the velocity of the wave? A. 3m/s B. 30
C. 300m/s D. 0.3m/s E. 150m/s
The half-life of a nuclide is 5 days, what fraction of the initial sample will remain
30 days ...
A. 1/8 B. 1/16 C. 1/24 D. 1/36 E/ 1/64
0.
HEMISTRY
How many farads of electricity are required to deposit 216 grams of silver fr
solution of silver nitrate?
A. 1 B.2 C. 3 D. 4 E. 5
Twenty two grams of a certain gas occupy 11.2 litres at S. T.P. Assume the gas be
ideally. How many mcles of gas are there in the system? A. 0.5 B. 0.6 C.
0.8 E. 0.9
Which is the most acidic oxide of the following? (A). CO (B). MnO (C). Ca
N20 (E). Cr203
The carbon atoms in propyne are arranged at A. 60° B. 90° C. 109° D. 120°
Which of the following have saturated isomer? A. methane and ethane B. met
propane C. ethane and propane D, butane and methane E. butane and pentane
When coal is heated at 1000 - 1300°C, the product is A. coal gas B. coal
coal neat coal flash E. coal bed​

answer; economic order quantity;

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.