If you look at a atom under a electron microscope you would use it
Helium is lighter than air from the lungs.
Explanation:
A balloon filled with the air from lungs will sink to the ground but a balloon filled with Helium floats because helium is lighter than air.
Air is a mixture of many gases.
The air from the lungs is predominantly made up of carbon dioxide and water vapor.
- Gram per mole of carbon dioxide is 44. Water vapor is 18.
- Compared to helium which is 4, we see that the gas is lighter.
- Since the gas is lighter, it will float in air.
- The main component of air around us is nitrogen gas with a gram per mole of 28.
- A balloon filled with more of air from the lungs weigh more than that will filled air around and even far more than helium gas.
- This will cause a helium filled balloon to float.
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Answer:
The German inventor of the movable-type printing press was Johannes Gutenberg.
Explanation:
- Johannes Gutenberg, the inventor of the mechanical movable type printing press introduced printing to Europe and started the Printing Revolution.
- In movable type technology of printing, the system used movable components to reproduce a document on the medium, usually paper. The advantages of this type of printing over woodblock printing were that the printing was quicker, the metal type pieces were more durable and the uniform lettering leads to typography and fonts.
- The metal movable-type printing press created by Johannes Gutenberg had the type pieces made from an alloy of lead, tin, and antimony. The casting of type pieces was done on matrix and hand molds. He created the first printed version of the Bible called the Gutenberg Bible using this printing technology.
- The movable-type printing press helped in the development of the Renaissance and the scientific revolution by the transmission of knowledge and laid the foundation of the modern knowledge-based economy.
Answer:
tissue are made of cells .
Answer:1.513 rps
Explanation:
Given
Diameter of cylindrical space 
When the station rotates it creates centripetal acceleration which is given by
Now it must create the effect of gravity so
and 
Thus 
