12 in./ft.) = 216 in. × 144 in. = 31,104 in.2./135000 divide by 31,104=4 - ANS ✔✔ - A
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
cubic foot of water weighs about 62.5 pounds. If an aquarium is 18 feet long, 10
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
feet deep, and 12 feet wide, what's the approximate pounds-per-square-inch
nl nl nl nl nl nl nl nl nl nl
pressure (psi) on the bottom of the tank?
nl nl nl nl nl nl nl nl
steel - ANS ✔✔ - Springs used in machines are usually made of
nl nl nl nl nl nl nl nl nl nl nl nl
coupling - ANS ✔✔ - : A clutch is a type of nl nl nl nl nl nl nl nl nl nl nl
runner - ANS ✔✔ - A single block-and-fall is called a
nl nl nl nl nl nl nl nl nl nl
divide the amount of work done by the amount of time it takes - ANS ✔✔ - A way
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
to determine the amount of power being used is to
nl nl nl nl nl nl nl nl nl nl
one - ANS ✔✔ - A simple pulley gives a mechanical advantage of
nl nl nl nl nl nl nl nl nl nl nl nl
100pounds/ Length of Ramp ÷ Height of Ramp = Weight of Object ÷ Effort. nl nl nl nl nl nl nl nl nl nl nl nl nl
Plugging in the numbers gives you:
nl nl nl nl nl nl
6/3 = 200/E nl nl
6E = 600 nl nl
E = 100 - ANS ✔✔ - If a ramp measures 6 feet in length and 3 feet in height, an
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
object weighing 200 pounds requires how much effort to move using the ramp?
nl nl nl nl nl nl nl nl nl nl nl nl nl
, thicknesses to a few thousandths of an inch - ANS ✔✔ - A micrometer is used to nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
measure
nl
friction - ANS ✔✔ - The force produced when two objects rub against each other
nl nl nl nl nl nl nl nl nl nl nl nl nl nl
is called
nl nl
14.7psi - ANS ✔✔ - Normally, atmospheric pressure is approximately
nl nl nl nl nl nl nl nl nl
produce a twisting action - ANS ✔✔ - Torsion springsnl nl nl nl nl nl nl nl nl
an incline plane - ANS ✔✔ - To move a 400-pound crate from the floor of a
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
warehouse to the bed of a truck 4-feet off the ground, the most efficient device to
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
use is
nl nl
water expands when it freezes - ANS ✔✔ - Water in an engine can cause damage
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
in winter weather because
nl nl nl nl
the fuel-air mixture is too rich - ANS ✔✔ - A yellow flame on a gas furnace
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
indicates that
nl nl
defective float - ANS ✔✔ - If a water tank on a toilet keeps overflowing, the
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
problem is probably a
nl nl nl nl
slanted teeth - ANS ✔✔ - Helical gears have nl nl nl nl nl nl nl nl
more slowly than Wheel A - ANS ✔✔ - Wheel A has a diameter of 10 feet. Wheel B
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
has a diameter of 8 feet. If both wheels revolve at the same rate, Wheel B will
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
cover a linear distance of 16 feet
nl nl nl nl nl nl nl
200 pounds/8 ÷ 4 = 400 ÷ E
nl nl nl nl nl nl nl
8⁄4 = 400⁄E nl nl
8E = 1,600 nl nl
8E⁄8 = 1,600⁄8 nl nl
E = 200 - ANS ✔✔ - If a ramp is 8-feet long and 4-feet high, how much effort is
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
required to move a 400-pound object up the ramp?
nl nl nl nl nl nl nl nl nl
one horsepower - ANS ✔✔ - 33,000 foot-pounds of work done in one minute is
nl nl nl nl nl nl nl nl nl nl nl nl nl nl
called
nl
130/Power = Force/Area. P = 130⁄1 = 130 - ANS ✔✔ - A 130-pound woman is nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
wearing shoes with high heels that measure 1-inch square. If the woman is
nl nl nl nl nl nl nl nl nl nl nl nl nl
standing on one heel, what psi does the heel exert as it rests on the ground?
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
(Disregard atmospheric pressure from your calculations
nl nl nl nl nl nl
static electricity - ANS ✔✔ - The force that causes clothes from the dryer to stick
nl nl nl nl nl nl nl nl nl nl nl nl nl nl nl
together is called
nl nl nl
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