Explanation

• The keyboard shortcut to open an existing file in Microsoft Word is Ctrl+O.
• You can also open a document in Word by double-clicking its icon in Windows. 

Additional information: 

• Ctrl+N: Opens a new or blank document
• Ctrl+S: Saves the document
• Ctrl+W: Closes the document
• Ctrl+A: Selects all contents of the page
• Ctrl+B: Bolds highlighted selection
• Ctrl+C: Copies selected text
• Ctrl+X: Cuts selected text
• Ctrl+P: Opens the print window

Last verified on 02-04-2026

Explanation

• Ctrl + C is the shortcut key used to copy selected text or files.

Additional information:

• Ctrl + B → Bold
• Ctrl + A → Select All
• Ctrl + W → Close current tab/window
• Alt + Tab → Switch between apps
• Alt + F4 → Close the active app
• Win + D → Show/Hide Desktop
• Win + ← / → → Snap windows left/right
• Win + Tab → Open Task View

Verified & Updated

Explanation

• The SI unit of energy is the Joule (J).
• It is the unit of energy, work, and heat.

Additional information:

• 1 Joule (J) = 1 Newton × 1 meter
• Calorie – 1 cal = 4.184 J
• Kilowatt-hour (kWh) – 1 kWh = 3.6 × 10⁶ J
• Electronvolt (eV) – 1 eV ≈ 1.602 × 10⁻¹⁹ J
• Erg (CGS unit) – 1 erg = 10⁻⁷ J

Last verified on 17-01-2026

Explanation

Explanation

• The atomic number of hydrogen is 1.
• It is the first element on the periodic table. 
• Named by: Antoine Lavoisier (1783)
• Atomic mass: 1.00784 u
• Appearance: Colorless gas
• Symbol: H
• Protons: 1
• Electrons: 1

Last updated 26-07-2026 by NA

Explanation

Explanation

• The first nuclear power plant was established in Karachi, 
• With the help of Canada 
• KANUPP is Pakistan's first nuclear power plant,
• Inaugurated on November 28, 1972,
• Total gross capacity of 137 MW.

Additional information

• K2 & K3 with the help of China 
  
• K2  started on 21 May 2021 and has an 1100 MW capacity.
• K3 is expected to start in 2022.

Last updated 18-07-2026 by NA

Explanation

• Pakistan conducted a series of nuclear tests on 28 May 1998 at the Chagai test site, in Balochistan.
• 5 Nuclear tests were conducted by Pakistan at 15:15 hrs PST on 28 May 1998.
• The tests were performed at Ras Koh Hills in the Chagai District of Balochistan Province.
• Chagai-I was Pakistan's first public test of nuclear weapons.

Additional information:

• Chagai-II is the codename assigned to the second atomic test conducted by Pakistan, carried out on 30 May 1998.
• These tests followed the Chagai-I series.
• The test site was Kharan Desert, Pakistan.
• The number of tests is 1.

Last verified on 30-03-2026

Explanation

• Name: Cheetah (Acinonyx jubatus)
• Top speed: ~109–120 km/h
• Acceleration: Can go 0 to 100 km/h in just a few seconds
• Habitat: Africa & parts of Iran
• Type: Carnivorous mammal

Additional information:

• The three-toed sloth is widely recognized as the slowest mammal on Earth.

Last verified on 23-06-2026

Explanation

• The common ostrich (Struthio camelus) is the biggest bird in the world.
• It is weighing up to 344 pounds (157 kilograms) and standing 9 feet tall.
• Female ostriches lay the largest eggs of any living bird.
  

• The world’s fastest bird is the peregrine falcon.
• The white bellbird is the world’s loudest bird.

Last verified on 01-07-2026