The physical quantity that provides a quantitative way to show how much thermal energy is required to raise the temperature of an object by a certain amount is
a. thermal conductivity
b. specific heat
c. specific weight
d. density
b. specific heat
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Explain why the stiffness of the subfloor is more important for ceramic tile or natural stone floor covering than for vinyl tile or carpet floor covering.
What will be an ideal response?
An amplifier class is determined by the way an amplifier is ____; that is, the various DC voltages that affect the transistor’s operation.
a. configured b. biased c. polarized d. efficient
Which of the following statements regarding photovoltaic cells on a green roof is MOST accurate?
A. The energy feed from photovoltaic cells can be easily shut off. B. Photovoltaic cells are readily identifiable during fire fighting operations. C. A roof containing photovoltaic cells may not have space for rooftop access and ventilation. D. Photovoltaic cells are unable to store and generate electric power when the electric power to a building is shut off.
When a coolant container is part of a pressurized system of these is true?
a. You never need to check the antifreeze in such a system. b. The radiator cap can be safely removed, and coolant added while the engine is hot. c. You can check the coolant level of a hot engine.