The slope of a velocity versus time graph gives
A) displacement. B) the distance traveled.
C) acceleration. D) velocity.
C
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The primary of a transformer
A) has an iron core. B) may or may not have an iron core. C) has more turns of wire than the secondary. D) none of the above
A fluid that flows very slowly compared to water has a high ________.
Fill in the blank(s) with the appropriate word(s).
Tensile Stress and Strain: A large 75-kg lighting fixture can be hung from wires of identical size and shape made of aluminum, brass, or copper. The values of Young's modulus for these metals are 0.70 × 1011 Pa (aluminum), 0.91 × 1011 (brass), and 1.1 × 1011 (copper). Which wire would stretch the least distance?
A. aluminum B. brass C. copper D. They will all stretch the same distance.
Which of the following substances has the greatest specific heat?
A. copper B. ice C. water D. steam E. Ice, water, and steam have equal specific heats since they are the same material, and this specific heat is greater than that of copper.