Explanation

DFD stands for Data Flow Diagram.

It is used to represent the flow of data in a system.

It shows how data moves between processes, data stores, and external entities.

Explanation

Uranium-235 (U²³⁵) is a fissile isotope, meaning it readily undergoes nuclear fission when struck by a neutron.

It is commonly used in nuclear reactors and atomic bombs for this reason.

Explanation

A co-enzyme is a non-protein organic molecule that is loosely bound to the enzyme and helps in its activity.

It often acts as a carrier of electrons or functional groups (e.g., NAD⁺, FAD).

Explanation

The slower motion of a pendulum is due to a longer period, which is related to the weaker gravitational force at higher altitudes

K2, being a very high mountain, has a significantly lower value of acceleration

Due to gravity, cities like Karachi, Murree, or Lahore result in a slower pendulum motion. 

Explanation

I have never known him for a long time.

میں اسے ایک عرصے سے کبھی نہیں جانتا تھا۔

"Have never known" is the correct present perfect tense.

It indicating that up until now, the speaker has never known the person.

Explanation

• Atoms of the same element with different numbers of neutrons are called isotopes.
• Atoms of the same element have the same number of protons and electrons but different numbers of neutrons.

Explanation

• Red has the longest wavelength in the visible spectrum,
• Measuring roughly 620 to 750 nanometers (nm).

Additional Information:

• Yellow: Incorrect – mid-to-long range, ~570–590 nm
• Blue: Incorrect – much shorter, ~450–495 nm

Explanation

The following table provides the botanical names for a variety of familiar plants: 

Explanation

Defective means غلطی یا خامی ہونا ؛ صحیح طریقے سے کام نہیں کرنا

Imperfect means کامل نہیں یا غلطیاں ہیں

Explanation

Chloroform, or trichloromethane, is an organic compound with the formula CHCl₃.

It is a colorless, sweet-smelling, dense liquid that is produced on a large scale as a precursor to PTFE.