Explanation

• A unit is a standard quantity that is used to measure other quantities of the same kind.
• For example, the meter is a unit of length, the kilogram is a unit of mass, and the second is a unit of time.

Explanation

• When we ascend or descend too quickly, our body struggles to adapt to the change in pressure, leading to altitude sickness or other injuries.
• This is why it's important to acclimate to higher elevations gradually, allowing our body to adjust to the decreasing pressure.

Explanation

• Force is a vector quantity.
• It means it has both magnitude (amount of force) and direction (the way it is applied).

Explanation

• Lactic acid is a natural preservative found in fermented foods like yogurt, cheese, and sauerkraut.
• It's produced during the fermentation process when bacteria like Lactobacillus convert sugars into acid.

Explanation

• Pascal's Law states that the pressure applied to a fluid (liquid or gas) in a container is transmitted equally throughout the fluid and to the walls of the container, and that the pressure is the same in all directions at a given point in the fluid.
• This principle has numerous applications in engineering, physics, and everyday life.

Explanation

• Bacteria are used in genetic engineering because they have the ability to multiply quickly, allowing for rapid production of large quantities of recombinant DNA.
• This is especially true for E. coli, which has a short generation time and can produce large amounts of protein.

Explanation

• Respiration is an involuntary process in the way: when voluntary respiration is not possible.
• This means that breathing continues automatically, even when we're not consciously thinking about it, such as during sleep or unconsciousness.

Explanation

• The unit of pressure equal to 1 newton per square meter (N/m2) is called a Pascal (Pa).
• It is named after French mathematician and physicist Blaise Pascal.

Explanation

1 kilometre (km) = 1000 metres (m)

So 0.05 km = 0.05 x 1000 m = 50 m.

Explanation

1 kg = 1000 g

So 4 kg = 4 x 1000 g = 4000 g.