Explanation

Distance is a scalar quantity because it only has magnitude (amount of length) but no direction.

Distance is a measure of how far apart two points are, but it doesn't have a direction.

Explanation

Time is a scalar quantity because it only has magnitude (duration) but no direction.

Explanation

These six quantities (length, mass, electric current, time, intensity of light, and amount of substance) are the fundamental base quantities in the International System of Units (SI).

They are the basic building blocks of the SI system and are used to define all other quantities.

Explanation

• If the zero line of the Vernier scale coincides with the zero of the main scale, it means that there is no zero error.
• Zero error occurs when the zero of the Vernier scale is not aligned with the zero of the main scale, resulting in a systematic error in the measurements.

Explanation

Significant figures (also known as significant digits) are the number of digits in a measurement or calculation that are known to be reliable and accurate, including the first doubtful digit.

For example, the measurement "23.4 cm" has four significant figures, while "23.40 cm" has five significant figures.

Explanation

The International System of Units (SI) is a modern metric system that defines the units of measurement for base quantities.

Such as length, mass, time, current, temperature, amount of substance, and luminous intensity.

The SI system was established in 1960 and is widely used across the world as a standardized system of measurement.

Explanation

To find the area of the chip wrapper, you multiply the length by the width:

Area = Length x Width

= 4.5 cm x 5.9 cm

= 26.55 cm^2

So, the area of the chip wrapper is 26.55 cm^2.

Explanation

• A spacecraft is a man-made object designed to perform specific tasks in space.
• Such as exploration, communication, or research. 
• Examples of spacecraft include satellites, space stations, and probes.

Explanation

• A Spectroscope is used to identify the chemical elements present in a star and determine its composition.
• By analyzing the light spectrum, astronomers can also determine the star's temperature, velocity, and distance from Earth.

Explanation

• A spectrum of light is the distribution of light into its individual colours.
• Typically displayed in the order of red, orange, yellow, green, blue, indigo, and violet (ROYGBIV).
• This is often seen in the form of a rainbow or produced through the use of a prism.