Anika and Sam are astronauts floating in space outside their spaceship. They are tethered together by a rope of length 10.5 m. They both begin pulling on the rope at the same time. Anika has mass of 80 kg, and Sam 100 kg. Because her mass is less, Anika reaches the middle of the rope first. Assuming the center of the rope is at the origin and that Anika and Sam start at 5.25 m and –5.25 m,
respectively, where is Sam when Anika reaches the middle?
a. 1.05 m
b. 0.53 m
c. 9.45 m
d. 4.20 m
a
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The lattice parameter of nickel is 0.352 nm, and for copper it is 0.363 nm. The electronegativities are 1.8 and 1.9, respectively, and they are both FCC metals. It is expected that there is _____________solid solubility of nickel in solid copper at elevated temperature.
Fill in the blank(s) with the appropriate word(s).
A square plate has an area of 29.00 cm2 at 20.0°C. It will be used in a low temperature experiment at T = 10.0K where it must have an area of 28.00 cm2. What area must be removed from the plate at 20.0°C for it to have the correct area at 10.0 K? (The coefficient of linear expansion is 10 × 10?6 (°C)?1.)
A. 0.079 3 cm2 B. 0.159 cm2 C. 0.238 cm2 D. 0.836 cm2 E. 0.921 cm2
Rocks solidified from molten material above ground are classified as ______________ igneous rocks
Fill in the blank(s) with correct word
A point source emits sound with a power output of 100 watts. What is the intensity (in W/m2) at a distance of 10.0 m from the source?
a. 7.96 × 10^?2 b. 7.96 × 10^?1 c. 7.96 × 10^0 d. 7.96 × 10^1 e. 7.96 × 10^?3