In epoxy and polyester thermoset polymers, liquid resin and liquid _________are mixed to form a liquid that transforms to a solid.
Fill in the blank(s) with the appropriate word(s).
hardener
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If a crystal has a fourfold axis of symmetry, the crystal can be rotated by _________degrees about this axis and the diffraction pattern will look exactly the same.
Fill in the blank(s) with the appropriate word(s).
Arnold Strongman and Suzie Small each pull very hard on opposite ends of a rope in a tug-of-war. The greater force on the rope is exerted by
A) Arnold, of course. B) Suzie, surprisingly. C) both the same, interestingly.
____________________ appear reddish in color due to the light emitted by the Balmer series of the hydrogen atom
Fill in the blank(s) with correct word
Glycerin, with a viscosity of 1.50 N • s/m2, is flowing with an average speed of 1.20 m/s through a tube that has a radius of 5.00 mm and is 25.0 cm long. What is the drop in pressure between the ends of the tube?
A) 144 kPa B) 45.8 kPa C) 72.0 kPa D) 76.3 kPa E) 129 kPa