What is eutrophication?

• A. The release of harmful chemicals into water bodies
• B. The excessive growth of algae due to nutrient enrichment
• C. The presence of heavy metals in water
• D. The formation of oil slicks on water surfaces

Total internal reflection occurs when light moves from?

• A. a dense medium to a less dense medium
• B. air to water
• C. water to glass
• D. a less dense to a dense medium

A bit as used in computing in digital communication is?

• A. a decimal digit.
• B. an octal digit.
• C. a bin digit.
• D. a hexadecimal digit.

The following are major gaseous pollutants except. Options

• A) CO
• B) CO₂
• C) SO₂
• D) CFC

If an increase in income induces a reduction in the demand for beans, beans can be referred to as?

• A. a normal good
• B. an inferior good
• C. a substitute good
• D. a giffen good

\(\begin{array}{c|c} Class & Frequency\\ \hline 1 - 5 & 2\\6 - 10 & 4\\11 - 15 & 5\\16 - 20 & 2 \\ 21 - 25 & 3\\26 - 30 & 2\\31 - 35 & 1\\36 - 40 & 1 \end{array}\)

Find the median of the observation in the table given

• A. 11.5
• B. 12.5
• C. 14.0
• D. 14.5

Birabbil Falaq in Quran 113 means

• A. Lord of the mankind
• B. from the envier when he envies
• C. from the evil of darkness
• D. Lord of the daybreak

Revenue is the

• A. cost of good multiplied by the quantity sold
• B. price of goods multiplied by the quantity sold
• C. quantity of goods plus purchase price
• D. quantity supplied less quantity sold

Goods brought into the country for sale are the country`s?

• A. invisible imports
• B. invisible exports
• C. visible imports
• D. visible exports

In 1934 physicist Eugene Wigner posited the existence of a crystal consisting entirely of electrons in a honeycomb-like structure. The so-called Wigner crystal remained largely conjecture, however, until Feng Wang and colleagues announced in 2021 that they had captured an image of one. The researchers trapped electrons between two semiconductors and then cooled the apparatus, causing the electrons to settle into a crystalline structure. By inserting an ultrathin sheet of graphene above the crystal, the researchers obtained an impression—the first visual confirmation of the Wigner crystal. Which choice best states the main idea of the text?

• A) Researchers have obtained the most definitive evidence to date of the existence of the Wigner crystal.
• B) Researchers have identified an innovative new method for working with unusual crystalline structures.
• C) Graphene is the most important of the components required to capture an image of a Wigner crystal.
• D) It