Which of the following best characterizes electrical conductors?
a. low mass density
b. high tensile strength
c. electric charges move freely
d. poor heat conductors
c
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The carbon in your DNA was fused in the first few minutes of the Big Bang
Indicate whether the statement is true or false
A 1-kg ball dropped from a height of 2 m rebounds only 1.5 m after hitting the ground. The amount of energy converted to heat is about
A) 0.5 J. B) 1.0 J. C) 1.5 J. D) 2.0 J. E) more than 2.0 J.
One of the changes experienced by a body of water when waste heat is added from a power plant is ________
a. an increase in water's capacity to hold oxygen b. an increased spawning success for fish c. an increased biological growing season d. decreased eutrophication
An empty spice bottle has an inner volume of 1.31 × 10^-4 m3 . It has a mass of 112 g when filled with air, and it displaces 1.63 × 10^-4 m3 of water when fully submerged. What fraction of the total volume of the bottle will be beneath the surface when it is placed in a tank of water?
a. 0.69 b. 0.81 c. 0.85 d. 1.00 e. 1.46