A rock brought back from the moon weighs 4 pounds and has a volume of 0.02 cubic feet. What is the rock's weight density?
200 lb/ft3
Physics & Space Science
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How does scientific notation help astronomers?
What will be an ideal response?
Physics & Space Science
Suppose the velocity of waves on a particular rope under a tension of 100 N is 12 m/s. If the tension is decreased to 25 N what will be the new velocity of waves on the rope?
A. 18 m/s. B. 12 m/s. C. 6 m/s. D. 24 m/s. E. 48 m/s.
Physics & Space Science
The first observations of objects in the solar system that orbited neither the Sun nor Earth were made by ____________________
Fill in the blank(s) with correct word
Physics & Space Science
The image produced by the lens of the eye on the retina when properly focused is:
A. real and inverted B. virtual and inverted C. real and upright D. virtual and upright
Physics & Space Science