Which has zero acceleration? An object
A) at rest.
B) moving at constant velocity.
C) in mechanical equilibrium.
D) all of the above
E) none of the above
Answer: D
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A large patch of darkness surrounded by many stars is probably a:
A. Black Dwarf B. Bok Globule C. Brown Dwarf D. None of the above E. Black Hole
Would bile salts be effective if they were polar molecules instead of amphiphilic molecules?
A. If bile salts were polar molecules they would be effective because they will be able to interact with the micelle. B. If bile salts were polar molecules they would be ineffective because they would not be able to interact with water molecules. C. If bile salts were polar molecules they would be effective because they will be attracted to the fatty acid tails of the lipids. D. If bile salts were polar molecules they would be ineffective because they would not be able to interact with lipids.
When an object floats in a liquid, the buoyant force is ____________ the weight of the object
a. equal to b. larger than c. smaller than d. not related to
In an x-ray diffraction experiment, using x-rays of wavelength ? = 0.434 × 10^?10 m, a first-order maximum occurred at 8° off the crystal plane. Find the distance d between crystal planes
a. 1.56E–10 m b. 2.19E–11 m c. 4.88E–10 m d. 1.70E–9 m e. 3.12E–10 m