Answer : Unit of any measurement can be defined as a definite magnitude of a given quantity, which is defined and adopted by convention or by law, that is widely used as a standard for measurement of the same kind of quantity. If the unit system was not given to the measurements we would haphazardly complicate the calculations.
Example : If someone wrote 500 in the paper as a answer to a question. But forgot to mention the units of the measurements. It can be misinterpreted by anyone as there are no units written besides the number (unit less). Complications grow. One cannot simply predict is it 500 m? 500 g? 500 mL? 500 km? 500 s? or 500 M? anything can be guessed. To be specific about the answer to any problem we should always use units. Which will help to narrow down the approach of any problem and give a measurable related quantity about the associated problem.
Hi there, the correct answer to this would be reactivity because color, melting point, and density are all examples of physical properties.
Answer:
It belongs to the last group with all the gas whose last shell are common and they are unreactive unlike to other elements which reacts to complete there last shell with total 8 electrons . Helium and Neon have in common that they have there shell complete and they reacts very less or they don't.
Explanation:
Hope it is helpful....
Answer:
The correct answers are electricity and discharge
Explanation:
Van de Graaff generator is an electrostatic generator. It is used for producing high voltage static electricity. It consists of a hollow metal sphere. The charges is accumulated on it from continuous motion of the belt which is made of an insulating material.
Due to polarization, the charges builds up on an object. Van de Graaf generator is an example of static charge.
Static discharge occurs when the built-up charges flow from the object. Lightning is an example of static discharge. Lightning occurs when the clouds having an opposite charges collide each other.
Therefore, building up electric charges on a Van de Graaff generator is an example of static electricity. Lightening is an example of static discharge.
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F.Wave C has a higher frequency than wave D
D. Wave B would sound quieter than wave C
B. Wave D has a higher amplitude than wave A
Explanation:
- A high amplitude wave is a high-energy wave, and a low-amplitude wave is a low-energy wave.
- In sound waves, a high amplitude sound will be loud, and a low amplitude sound will be quiet.
- Frequency is the number of ways that pass by each second, measured in hertz.
- The amplitude and frequency are the two factors that affect the energy which is transferred by a wave.
- The height of the wave, and the number of waves passed by each second in case of amplitude and frequency.