Are the laws of energy [conservation of energy, and 2nd law of thermodynamics] known for certain to be true?
A) No; in fact these laws are known to be violated at sufficiently high speeds, small distances, and large distance.
B) No, because all scientific laws are tentative.
C) No, for both of the above reasons.
D) Yes, because despite repeated checking they have never been found to be false.
E) Yes because, unlike some of the other laws, these laws are true by logical deduction from a priori premises.
B
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The in-plane shear strength of a uniaxial composite material is approximately _________the magnitude of the transverse tensile strength.
Fill in the blank(s) with the appropriate word(s).
Where is the center of mass of a binary system consisting of two stars with different masses?
A) the center of the more massive star B) the center of the less massive star C) the point halfway in between the two stars D) a point between the two stars that is closer to the more massive star E) a point between the two stars that is closer to the less massive star
A scooter has wheels with a diameter of 120 mm. What is the angular speed of the wheels when the scooter is moving forward at 6.00 m/s?
A) 47.7 rpm B) 955 rpm C) 72.0 rpm D) 50.0 rpm E) 100 rpm
A bimetallic strip is made out of two strips of metal bonded together. Each strip is 20.0 cm long and 1.00 mm thick
One strip has a coefficient of thermal expansion 4.00 × 10-6/K and the other has a coefficient of thermal expansion 3.00 × 10-6/K. At 20.0°C the strip is straight. What is the inner radius of curvature of the composite strip at 200°C? A) 15.2 cm B) 2.22 m C) 1.27 m D) 34.8 cm E) 5.56 m