Which of the two blocks of wood is less dense? Explain how you know
What will be an ideal response?
Block B is less dense because it floats higher in the water. Less dense blocks project higher above the water line than more dense blocks. This is because the pressure at the base of the blocks must be the same as the pressure in the water at the same depth.
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The boiling point of methanol is 65°C, and the boiling point of ethanol is 78°C. Which of the following statements is true?
A. At 40°C, the methanol reacts with the ethanol. B. At 70°C, you would have methanol gas and liquid ethanol. C. At 50°C, you would have methanol and ethanol as gases. D. At 90°C, you would have methanol and ethanol as solids. E. none of the above
Considering a hurricane heading westward toward Florida, where are the strongest winds most likely found?
A. on the eastern side B. on the northern side C. on the western side D. on the southern side
Equilibrium between which of the following factors is described by the hydrostatic equation?
A. vertical pressure gradient force and gravity B. friction force and gravity C. Coriolis force and gravity D. horizontal pressure gradient force and gravity
What is a climax community?
a. The first community after a large disruption b. A new, growing community c. A stable, long-established community d. The decline of a community after it peaks