Explanation

Efficiency is the ratio of output to input, often expressed as a percentage.

It represents how much of the input energy is actually converted into useful output energy, with the rest being lost as waste or heat.

Key Points:

• Energy is the ability to do work.
• Work is the transfer of energy through a force applied over a distance.
• Power is the rate at which work is done or energy is transferred.

Explanation

NaCl is a classic example of an ionic compound

Where sodium (Na) loses an electron to become a positively charged ion (cation),

And chlorine (Cl) gains an electron to become a negatively charged ion (an anion).

Formula: NaCl

Molar mass: 58.44 g/mol

IUPAC ID: Sodium chloride

Melting point: 801 °C

Soluble in: Water, Ammonia, Ethanol, Glycerol, Methanol, Propylene glycol, Formic acid, Formamide

Classification: Salt

Boiling point: 1,465 °C

Explanation

Plasmodium is a genus of protozoan parasites that cause malaria.

There are several species of Plasmodium that can infect humans, including P. falciparum, P. vivax, P. ovale, and P. malariae.

Explanation

• Enzymes are biological molecules made up of proteins, which catalyze chemical reactions, speeding up metabolic processes in living organisms.
• Proteins provide the structure and active site for enzymes to bind substrates and facilitate chemical reactions.

Explanation

Heat is a form of energy, specifically thermal energy, which is transferred from one body to another due to a temperature difference.

It is a type of kinetic energy, where the particles of a substance vibrate or move rapidly, generating heat.

Explanation

A body is in equilibrium when the net force acting on it is zero, and it is not changing its motion.

This means that the body is either at rest or moving with a constant velocity (uniform speed), but not accelerating.

Explanation

Power is the work done per unit time, measured in watts (W).

It represents the rate at which energy is transferred or work is done.

Additional Information:

• Efficiency is the ratio of output to input energy.
• Energy is the ability to do work.
• Force is a push or pull that can cause an object to change its motion.

Explanation

• The correct answer is: Cell does not contain the hereditary material.

The cell theory postulates:

• All living organisms are made up of one or more cells.
• The cell is the fundamental unit of life.
• New cells are derived from pre-existing cells (biogenesis).

Explanation

Condensing is the process by which a gas changes state to become a liquid.

This occurs when the temperature and pressure of the gas are reduced to the point where the molecules slow down and come together to form a liquid.

Key Points:

• Melting is the process where a solid becomes a liquid.
• Freezing is the process where a liquid becomes a solid.
• Boiling is the process where a liquid becomes a gas.

Explanation

The spring constant (k) represents the force required to stretch or compress a spring by a certain distance.

The unit of spring constant is Newton per meter (N/m) or Newton per meter^-1 (Nm^-1).