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Two important advantages of secondary data are: (1) the tremendous time savings if the data have already been collected; and (2) the low cost (for example, most census reports are available for only a few dollars each).
In gymnastics, which event is performed on a large floor mat?
Who among the following is credited with the discovery of X-rays?
What is the escape velocity of the moon?
Electrical fuse is used to interrupt excess of _________.
Which of the following occurs in a positively charged body ------------.
Which law describes the relationship between electric current and potential difference?
Which law is also called the law of inertia?
Which element is known for its high electronegativity?
Which of the following layers of the atmosphere makes Radio Communication possible?
Which medium cannot propagate sound waves?