Explanation

Saudi Arabia Capital is Riyadh.

Currency is the Saudi Riyal.

The official language is Arabic.

It is located in the Continent of Asia.

The Primary Religion is Islam.

The head of the Government is King and Prime Minister – Mohammed bin Salman.

The Parliament, called Majlis Al Shura.

Tricks for Remember

RK12-12-2022

Explanation

- A shirt is a type of dress.  

- A mango is a type of fruit.  

Explanation

1 kilowatt-hour (kWh) is equivalent to 3.6 million joules (MJ).

As it represents the energy used when 1 kilowatt of power is consumed for 1 hour.

Explanation

• A plane mirror produces a virtual image, meaning it's not a real image that can be projected onto a screen.
• The image is also upright, meaning it's not inverted or flipped.

Explanation

• The SI unit of power is the watt (W). 
• A watt is equal to one joule of work done per second. 
• Symbol: W
• Definition: 1 watt = 1 joule per second
• Named after: James Watt 

Explanation

Newton's first law of motion is also called as Law of inertia.

• Inertia is the ability of a body by virtue of which it opposes a change.
  
• According to Newton’s first law of motion, an object will remain at rest or in uniform motion in a straight line
• unless acted upon by an external force.
  • The inertia of rest: When a body is in rest, it will remain at rest until we apply an external force to move it. This property is called inertia of rest.
  • The inertia of motion: When a body is in a uniform motion, it will remain in motion until we apply an external force to stop it. This property is called inertia of motion.

Explanation

Acid reacts with alkali → Neutralization Reaction  

  - Acid + Base (alkali) → Salt + Water  

  - Example: HCl + NaOH → NaCl + H₂O  

  - It’s an exothermic reaction (releases heat).

Explanation

Tannic acid is found in plant materials

It is a type of tannin (a polyphenol)

Beverages: Tea, coffee, and wine are common sources. 

Fruits: Berries like cranberries and blueberries, as well as grapes, apricots, and peaches. 

Nuts: Some acorns, hazelnuts, walnuts, and almonds contain tannins. 

Other Foods: Legumes, chocolate, and even spices like cinnamon can contain tannins. 

Explanation

- A voltmeter measures the potential difference (voltage) between two points in a circuit.  

- It is always connected in parallel to the component.  

- The SI unit of potential difference is the Volt (V).  

- Potential difference is the work done per unit charge to move a charge between two points.  

  - Formula: V = W / Q  

    - V = potential difference (volts)  

    - W = work done (joules)  

    - Q = charge (coulombs)  

- A voltmeter has high resistance so it doesn't draw current from the circuit.

Explanation

A year may be a leap year if it is evenly divisible by 4.

The Solar year is 365.2422 days long, a length which no calendar year can accommodate.

Generally, a leap year happens every four years

The next leap day will be on Thursday, February 29, 2024.

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