Explanation

"He" is a third-person singular subject.

With the third-person singular in the present simple tense, we add -s to the verb: lives.

"He lives in Pakistan" is a general fact or regular situation.

Explanation

A computer system that is old and perhaps not satisfactory is referred to as a legacy system.

Other terms that might be used, depending on the context, include "outdated" or "obsolete". 

Explanation

 The SI unit of rotational kinetic energy is the Joule (J)

All forms of energy, including rotational kinetic energy, are measured in Joules. 

Explanation

Explanation

Integrated Circuits (ICs) are primarily classified based on the number of transistors they contain. 

The number of transistors on an IC is a key indicator of its complexity and processing power.

Different levels of integration (SSI, MSI, LSI, VLSI) are defined based on the transistor count.

This classification system is widely used. 

Explanation

Files created with Lotus 1-2-3 typically have file extensions such as .WK1, .WKS, .WK2, .WK3, .WK4, or .123.

 WK1 is a correct extension for files created with Lotus 1-2-3. 

Explanation

Positive rays, also known as canal rays, are formed when electrons in a discharge tube collide with gas atoms, ionizing them and creating positively charged ions.

These ions then travel towards the cathode and are repelled by it, passing through holes in the cathode to form a stream of positive rays. Since these rays are composed of ions derived from the gas present in the tube,

Their nature is directly determined by the composition of the residual gas within the discharge tube. 

Explanation

When the elevator accelerates downward with acceleration equal to gravity (g = 9.8 m/s²), the apparent weight becomes:

W' = m(g - a) = m(9.8 - 9.8) = 0  

So, the object becomes weightless.

Explanation

A website is a collection of web pages, so the answer is Data. 

A website is essentially a group of interconnected pages accessible through a single domain name.

While a domain name might be considered an address,

The website itself is the data contained within those pages.

A search engine, on the other hand, is a tool used to find websites

Explanation

The correct verb is "complained to" — we use this when someone expresses dissatisfaction to a person in authority.

"Complained to the officer" fits naturally with "about his misdeeds."