Measuring stellar masses using binary stars is difficult because binary stars are rare.
Answer the following statement true (T) or false (F)
False
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A potential energy function is given by U(x) = (3.00 J)x + (1.00 J/m2)x3. What is the force function F(x) that is associated with this potential energy function?
What will be an ideal response?
A glass flask has a volume of 500 mL at a temperature of 20° C. The flask contains 492 mL of mercury at an equilibrium temperature of 20°C. The temperature is raised until the mercury reaches the 500 mL reference mark
At what temperature does this occur? The coefficients of volume expansion of mercury and glass are 18 ×10-5 K-1 (mercury) and 2.0 ×10-5 K-1 (glass). A) 120°C B) 140°C C) 110°C D) 130°C E) 100°C
Which of the following procedures would not be expected to increase the yield strength of LDPE?
(a) Quenching the LDPE to room temperature from the liquid state (b) Increasing the crystallinity (c) Increasing the molecular mass (d) Decreasing the side branching
What causes the image of a star to "twinkle" or scintillate?
A. a purely physiological reaction in the eye B. the flickering fusion process in the stars C. irregularities in the density of layers of Earth's atmosphere, rapidly refracting the light D. None of these choices are correct.