Specific gravity is the ratio of a mass of a substance to the mass of an equal volume of air.
Answer the following statement true (T) or false (F)
False
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Water is 88.88% oxygen by mass. Oxygen is exactly what a fire needs to grow brighter and stronger. So why doesn't a fire grow brighter and stronger when water is added to it?
A. The oxygen is chemically bound to hydrogen atoms. B. Oxygen in water is already "reduced" from the hydrogen atoms, so this oxygen atom no longer has a great attraction for additional electrons. C. Oxygen in water is completely different from oxygen O2, which is what is required for combustion. D. all of the above
In the summer, the heater on an automobile still works well, even though you do not need it. This is because the heater in a car draws on surplus heat generated when gas is used to power the engine
This extra heat, wasted in the summer, is produced as a result of the A) Law of the Conservation of Momentum. B) First Law of Thermodynamics. C) Law of Inertia. D) Second Law of Thermodynamics.
Permanent damage to the ears begins after prolonged exposure to ____ decibels.
A. 46 B. 85 C. 25 D. 142 E. 182
Given all other conditions are the same, ground water flows faster if ________.
A. it is flowing through finer-grained materials B. it is colder C. it is flowing through deeply buried material D. it is flowing in response to a greater hydraulic gradient E. it is saturated with dissolved solids