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Related Flashcards
Cards In This Set
| Front | Back |
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What type of pullys provide mechanical advantage?
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Only MOVEABLE pullys
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Hydrometers use floats to measure what?
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Specific Gravity
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What is specific gravity?
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The weight of a liquid compared with the weight of the water. The liquid with the highest specific gravity will cause the float to rise higher in the glass tube.
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Where is the fulcrum in a first class lever?
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In the middle
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Where is the fulcrum in a second class lever?
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Fulcrum is at one end, load is in between
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In pullys, the smaller pulley will:
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Turn faster than those larger than it.
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Mechanical advantage in pistons
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a2*d2=a1*d1
a= area, d=displacement
smaller D/ bigger D = mechanical advantage
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Current stays the same in what type of circuit?
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Series circuit.
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Current is _________ in series, ______ is not
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Constant, voltage
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Voltage is _______ in a parallel, _______ is not
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Constant, current
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Formula for voltage?
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V=I*R
(curren
t*resistance=Voltage)
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Which circuit has a greater resistance?
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The circuit with the greater resistance is usually in series, because it forces the current through all resistors
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In a 2 pulley system the moveable pulley will only move up _______ the distance, and spin ________ as much as a fixed pulley.
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Half
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By increasing the length of the lever arm, the effort is ________ enabling a alve to blow off at a higher pressure. Move the weight further away to do this.
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Increased
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Rate of heat exchange is _________ through objects of ________ temperature diference.
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Faster, greater
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