A boat moves at 10.0 m/s relative to the water. If the boat is in a river where the current is 2.0 m/s, how long does it take the boat to make a complete round trip of 1.00 km upstream followed by a 1.00 km trip downstream?
What will be an ideal response?
208 s
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Two different samples have the same mass and temperature. Equal quantities of energy are absorbed as heat by each. Their final temperatures may be different because the samples have different:
A. thermal conductivities B. coefficients of expansion C. densities D. volumes E. heat capacities
A ship that weighs 10,000 tons (mass 10 million kg) must displace what volume of fresh water in order to float?
A) 104 m3 B) 107 m3 C) 108 m3 D) 1010 m3 E) 1012 m3
The Mercalli scale was used to measure
a. tornados. b. earthquakes. c. tsunamis. d. hurricanes.
Given the following generic chemical reaction, which is the product?
X ? Y A) Y is the product. B) X is the product. C) ? is the product. D) Both X and Y are the products. E) Both X and Y are the reactants.