Which one of the following cannot be a definition of an elastic modulus?
A.
B.
C.
D.
E.
Answer: D
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A liter-sized block of wood floats in water. The volume of water displaced is
A) less than 1 L. B) 1 L. C) greater than 1 L. D) none of the above
If the calorimeter is not well insulated, how will heat from the air in the laboratory affect the experimental value for the latent heat of vaporization?
An unusual lightning strike has a vertical portion with a positive current of +400 A upwards. The Earth's magnetic field at that location is parallel to the ground and has a magnitude of 30 ?T. In N, the force exerted by the Earth's magnetic field on the 25 m-long current is
A. 0. B. 0.012 N, East. C. 0.012 N, West. D. 0.30 N, West. E. 300 N, East.
Which of these lamps has no mercury content?
A) fluorescent lamp B) CFL C) incandescent lamp D) none of the above