Dragon safety

 https://twitter.com/elonmusk/status/1328124552459603968

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Control

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 Control A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable.   noun.  English Language Learners Definition of control. The power to make decisions about how something is managed or done. The ability to direct the actions of someone or something. : an action, method, or law that limits the amount or growth of something   There are three main variables: independent variable, dependent variable and controlled variables. Example: a car going down different surfaces. Independent variable: the surface of the slope rug, bubble wrap and wood. Dependent variable: the time it takes for the car to go down the slope.
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Cell

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 Cell Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells have many parts, each with a different function.   The Four Main Types of Cells Epithelial Cells. These cells are tightly attached to one another. Nerve Cells. These cells are specialized for communication. Muscle Cells. These cells are specialized for contraction. Connective Tissue Cells.   Human body averages 37.2 trillion cells. This is not a final number, but it's a very good start. While it's true that people may vary in size. ovum The largest cell is ovum in the human body. The ovum also called egg cell is the reproductive cell in the female body. Ovum is 20 times bigger than the sperm cells and has a diameter of about 0.1 mm.
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Lab

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 Lab is a facility that provides controlled conditions in which scientific or technological research, experiments, and measurement may be performed.   Lab is also used for Laboratory.   A lab is typically a class where you do the "hands on" work of that course. They're often offered for science courses so that students can actually engage with the material they're learning (such as mixing chemicals in chemistry, dissections in biology). They can include doing experiments, writing reports, tests, etc.   A sample of a material to be tested or analyzed that is prepared from a gross sample and retains the latter's composition.
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