Joule is the unit of energy in the SI system, defined as the work done when a force of one newton displaces an object by one meter.

Enthalpy can be expressed in Joules, Calories, and Kilojoules.

Hertz (Hz) is the unit of frequency, defined as cycles per second.

Pascal (Pa) is the SI unit of pressure, defined as one newton per square meter.

The NAND gate is a universal gate because it can be used to create any other gate.

In base-4, valid digits are 0, 1, 2, and 3. Therefore, 123 is valid, while 234, 345, and 456 contain digits not allowed in base-4.

A number is divisible by 10 if it ends in 0.

All listed methods are valid techniques for solving systems of linear equations.

All listed methods are valid for solving systems of linear equations.

In base 8, 15 is represented as '17' (1*8 + 7).

Malaria is transmitted by the female Anopheles mosquito, which acts as a vector.

Dengue fever is transmitted by Aedes mosquitoes.

Displacement is a vector quantity as it has both magnitude and direction.

Urea is a waste product formed from the breakdown of proteins and is excreted in urine.

Vitamin C is a water-soluble vitamin, which means it dissolves in water and is not stored in the body.

Ammonia is considered a weak base compared to the others listed.

Google Chrome is a web browser used to access the internet.

Abiotic factors are the non-living physical and chemical components of an ecosystem, such as temperature.

Tall describes a noun and is therefore an adjective.

'Quickly' describes how an action is performed, making it an adverb.

Alkanes are saturated hydrocarbons with the general formula CnH2n+2. C4H10 (butane) fits this formula.

Electrical current can be compared to water flow in a pipe, where the flow of water represents the flow of electric charge.

Sparse means having few people or things, which is the opposite of crowded.

'Contract' means to decrease in size, which is the opposite of 'expand'.

'Pessimistic' means having a negative outlook, which is the opposite of 'optimistic'.

'Decelerate' means to reduce speed, making it the antonym of 'accelerate'.

'Inarticulate' is an antonym of 'articulate', meaning unable to express oneself clearly.

'Confused' is an antonym of 'coherent', which means logical and consistent.

'Resist' is the opposite of 'conform', which means to comply with rules or standards.

'Convoluted' means complicated or intricate, so the opposite would be 'simple'.