Arc length = (θ/360) * 2πr = (60/360) * 2 * (22/7) * 10 = 10.47 cm.

Diagonal = √((3-0)² + (4-0)²) = √(9 + 16) = √25 = 5.

The main function of the kidneys is to filter blood and produce urine.

The main function of the nervous system is to coordinate body activities by transmitting signals between different parts of the body.

The main product of the reaction between methane and chlorine in UV light is methyl chloride (CH3Cl).

The main role of the digestive system is to break down food into smaller molecules that can be absorbed into the bloodstream.

Household waste, including sewage and chemicals, is a significant source of water pollution in urban areas.

Mean = (2 + 4 + 6 + 8 + 10) / 5 = 30 / 5 = 6.

First, sort the data: 1, 2, 3, 4, 5. The median is the middle value, which is 3.

The mode is the number that appears most frequently, which is 2.

Moles of NaCl = 5 g / 58.5 g/mol = 0.0855 mol. Molarity = 0.0855 mol / 0.25 L = 0.34 M.

Ethylene is an alkene with the molecular formula C2H4.

Perimeter = 3 * side = 3 * 6 = 18 cm.

Using the formula for weak acids, pH = 0.5 * (pKa - log[C]) = 4.76.

pH = -log[H+] = -log(1 x 10^-7) = 7.

Acid rain is primarily caused by sulfur dioxide and nitrogen oxides released into the atmosphere from burning fossil fuels.

The autonomic nervous system regulates involuntary functions such as heart rate and digestion.

The primary function of the circulatory system is to transport nutrients and oxygen to cells and remove waste products.

The heart's electrical conduction system regulates heart rate by generating and conducting electrical impulses.

The primary function of the immune system is to protect the body against pathogens.

The primary function of the respiratory system is to exchange gases, specifically oxygen and carbon dioxide, between the body and the environment.

The spinal cord transmits signals between the brain and the rest of the body.

Carbon Dioxide is the primary greenhouse gas emitted through human activities, particularly from burning fossil fuels.

Natural selection is the primary mechanism of evolution, where organisms better adapted to their environment tend to survive and reproduce.

The primary principle behind the operation of a transformer is magnetic induction.

The primary risk of an electrical injury to the heart is cardiac arrest, which can occur due to disruption of the heart's electrical system.

Myelin insulates axons and speeds up the transmission of electrical signals along neurons.

The primary role of red blood cells is to transport oxygen from the lungs to the body's tissues and return carbon dioxide to the lungs.

Heredity is the process by which traits are transmitted from parents to their offspring.

The reaction of ethene (C2H4) with bromine (Br2) produces dibromoethane (C2H4Br2).