In astronomy, what is a "galaxy"?
What will be an ideal response?
An assembly of stars and clusters of stars.
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Scientific Notation: Which one of the following numbers is equivalent to the number 0.0001776?
A. 1.776 × 10-4 B. 17.76 × 10-3 C. 1776 × 10-5 D. 177.6 × 10-7
You drive 6.0 km at 50 km/h and then another 6.0 km at 90 km/h. Your average speed over the 12 km drive will be
A) greater than 70 km/h. B) equal to 70 km/h. C) less than 70 km/h. D) exactly 38 km/h. E) It cannot be determined from the information given because we must also know directions traveled.
Ultraviolet light is absorbed in the
A) exosphere. B) thermosphere. C) stratosphere. D) troposphere. E) none of the above
Semiconductor technology has been the basis for many new electronic devices
a. True b. False Indicate whether the statement is true or false