A 20-kg sack of potatoes at the corner store weighs
A. 190 pounds.
B. 150 pounds.
C. 44 pounds.
D. 9.9 pounds.
C. 44 pounds.
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Dimensional Analysis: The rate R at which paint can be sprayed from a spray gun can be expressed as R = a · t. If R is measured in m3/s, and time t is measured in seconds, what are the SI units of a?
A. m3 B. m3s C. m3s3 D. m3/s E. m3/s2
When aqueous solutions of Na2CO3 and BaCl2 are mixed, the products are NaCl and ______________
Fill in the blank(s) with correct word
What is the evidence that a meteorite impact caused the great extinction at the end of the Mesozoic?
What will be an ideal response?
Compound Microscope: The objective lens and the eyepiece of a microscope have focal lengths of 4.0 mm and 25 mm, respectively. The objective produces a real image 30 times the size of the object, with the final image viewed at infinity. The near point of the microscope user is at 25 cm. What is the magnitude of the overall magnification of the microscope?
A. 250 B. 300 C. 350 D. 400 E. 450