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The principle of the conservation of mechanical energy states that the total mechanical energy (PE+KE)
of an object remains constant as long as no other force is applied.
What is the principle of the conservation of mechanical energy?
series
A circuit with only one path is a(n) ________ circuit.
PNP and NPN
What are the 2 types of transistors?
a ground provides a low-resistance path to guide excess electrical energy away from panels and loads, to
protect them in the case of lightweight or circuit failure
What does an electrical ground do?
battery symbol
Identify battery symbol
electrons (or negative charge)
if one battery's terminal supplies greater voltage than that of another battery, the first battery terminal
has more _________
60
In North America, AC is delivered at __________Hz
motor symbol
Identify motor symbol
,capacitor (or condensor)
Identify capacitor (or condensor) symbol
higher engine operating speeds; more complete combustion of the air-fuel mixture
What are the two advantages of a four-valve cylinder head over a two-valve cylinder head?
The distributor is responsible for timing the ignition spark and distributing it to the correct cylinder.
What function does the distributor perform?
An intake manifold is the structure that delivers air to the intake ports of the engines cylinders
What does an intake manifold do?
hydraulic (or fluid)
Brakes work through ______ pressure.
The viscosity of a liquid is its resistance to flow; liquids with higher viscosity are thicker and flow less
easily.
Define viscosity
overhead valve
OHV stands for _____
rectifier (or rectifier bridge)
the AC electricity produced by the alternator is converted to DC by the _______
rivet
What fastener is used to create a semipermanent assembly?
for protection from ultraviolet light
Why must welders wear helmets and protective clothing?
a table saw, which is a type of circular saw
,What type of saw is embedded within a table and has a rotating blade?
hacksaw
What type of saw is used for cutting metal?
crescent wrench
An adjustable wrench is also called a(n) ______
A tubular spirit level is useful for measuring levelness in one dimension, whereas a bullseye spirit level
can measure the levelness of a plane in all directions.
What is the difference between a tubular spirit level and a bullseye spirit level?
socket; ratchet handle
Instead of using a wrench to loosen a fastener in a tight space, a worker could use a ______ with a
_____
the number of protons in the nucleus of an atom
atomic number
the weighted average of the masses of the isotopes of an element
atomic mass
The composition of these planets is similar to that of Earth
Why are the four planets closest the the Sun called terrestrial planets?
1,000,000 (1 million) times larger
1 mm x 1,000 = 1 meter
1 meter x 1,000 = 1 km
1 kilometer is how many times larger than 1 millimeter?
reactants; products
, In chemical reactions, the molecules and atoms entering the reaction are called ______, and those
resulting from the reaction are called ______
stratus, cirrus, cumulus
Name the three major types of clouds
noble gases
Elements whose outer shells are completely filled with electrons are ______
(females) homozygous, XX
(males) heterozygous; XY
In females, the sex chromosomes are _______ and are designated by the letters ____. In males, the sex
chromosomes are _____ and are designated by the letters _____
water and a salt
When an acid is combined with a base, they produce __________
incidence; reflection ( or reflection; incidence)
When light reflects off a surface, the angle of __________ is equal to the angle of ______________
high blood pressure
What is the common name for hypertension?
ionic
When one atom bonds to another atom by "borrowing" an electron from it, a(n) ______ bond is formed.
plasma, red blood cells, white blood cells, platelets
Name the 4 major components of blood.
brain; spinal cord
The central nervous system is composed of the ____ and the _____.
fight infection
What do white blood cells do?
base times 0.1 ; d
Identify the value and abbreviation of this metric system prefix: deci
arteries; veins
In general, _____ carry oxygenated blood, while _____ carry deoxygenated blood.
The smallest blood vessels, which deliver oxygenated blood to the body's tissues and carry away
deoxygenated blood