Answer:
Measuring distances to stars through stellar parallax. Measuring distances to stars through the moving cluster method. Astronomers measure the temperature of a star by looking at the star's color and its spectrum. The apparent brightness of a star tells how bright it seems to us
Explanation:
Answer:
1L
Explanation:
First, let us calculate the number of mole present in 20g of NaOH. This is illustrated below:
Mass = 20g
Molar Mass of NaOH = 23 + 16 + 1 = 40g/mol
Number of mole =?
Number of mole = Mass /Molar Mass
Number of mole of NaOH = 20/40 = 0.5mol
From the question given, we obtained the following data:
Molarity = 0.5M
Mole = 0.5mole
Volume =?
Molarity = mole /Volume
Volume = mole /Molarity
Volume = 0.5/0.5
Volume = 1L
All of the above
Explanation:
Science is a methodical way of investigating the world around us in order to find out the truth and facts about them. Technology is the practical aspect of science.
- The knowledge and understanding of x-rays as part of the electromagnetic radiation made it possible to use the rays to study the internal structures of substances.
- The discovery of radioactivity has led to the development of nuclear energy that are produced in nuclear reactors.
- Satellites are built on the principles of science.
- Robotic machines are based on scientific studies and electricity originated from a good knowledge of the atom.
Learn more:
radioactivity brainly.com/question/10125168
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Any substance that contains only one type of atom is referred to as an element.Elements are the "building blocks" of everything. Each element only contains one type of atom. If substances carry more than one type of atom, then they are compounds.
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