abeka physical science test 3
What is the magnitude of the force required to accelerate a 1000kg truck at 2m/s2
1000 x 2 = 2,000 N
small piston has area of 2cm3, piston has area of 16cm3. Force of 4N applied to small piston. What is output force?
16 x 4 / 2 = 32
Which of the following expresses 2702 correctly in scientific notation?
2.702 x 10^3
A sample of gas occupies 4.0 L at a pressure of 102.2 kpa. What is new volume if the pressure is increased to 116.8 kpa?
4 x 102.2 / 116.8 = 3.5
What is the average speed of a person who walks 50km in 5.0h?
50 / 5 = 10 km/hr
What is a car's acceleration in the direction of motion when velocity changes from 20. m/s to 60. m/s in 10. s?
60 - 20 = 40 40 / 10 = 4 m/s^2
What is the efficiency of a machine that has a work output of 630. J and a work input of 700. J?
630 / 700 = 90%
What is the density of an object witha mass of 90g and a volume of 3.0cm3?
90 / 3 = 30
the multiplication of the input force that a machine provides under real world conditions is ___?
AMA
What is the attractive force between unlike molecules?
Adhesion
What law states that temperature and pressure are directly related when volume is held constant?
Amonton's law
What principle states the buoyant force experienced by an object is exactly equal to the weight of the fluid displaced?
Archimedes' law
Newton's second law of motion state
F=ma
pascals principle
Finput/Ainput=Foutput/Aoutput
What is the ratio of input distance to output distance?
IMA
What is Boyle's Law?
P1V1=P2V2
When you shake a carbonated beverage, why does the beverage fizz and possibly explode when the top is opened?
The pressure builds from the gas inside the container.
When a glass of water spills on a table, why does water bead and puddle instead of flattening to the smooth surface?
The water coheres and pulls back from the table.
Charles' Law
V1/T1=V2/T2
What term refers to the change of velocity with time?
acceleration
The closeness of a measurement to the quantity's actual value
accuracy
What device measures altitude?
altimeter
The device that uses an airtight metal box with thin, flexible walls to measure pressure is an ?
aneroid barometer
What is an upward force exerted by a fluid on a solid object placed in the fluid?
buoyancy
What causes an object to travel in a curved path rather than a straight line?
centripetal force
What law states that if the pressure of a gas is constant, its volume and temperature are directly proportional?
charles law
what class of lever has the input force applied between the fulcrum and output force?
class 3 levers
What is the ability of a gas to be easily squeezed or compacted?
compressibility
In the engineering design process, what is any characteristic required for design to function?
criteria
What valid form of inference supposes that when the consequent is false the antecedent must be false?
denying the consequent
What is the fluid friction that tends to slow an object as it moves through a fluid?
drag
What fallacy occurs when a term is misleadingly used with two different meanings in a single argument?
equivocation
What is a factor changed to test a hypothesis?
independent variable
What is a conclusion based on reasoning from evidence?
inference
Who discovered the laws of motion and gravitation
isaac newton
what is the SI unit for work
joules
What is the force of an object that is generated by relative motion between the object and a fluid that is upward.
lift
state of matter where molecules can move freely/conform to the shape of the container but remain attracted to each other
liquid
The phenomenon of a spinning cylinder or ball causing lift is the ________ effect.
magnus
the amount of matter in an object
mass
What system of measurement was designed by French scientists to be simpler to learn the FPS system?
metric system
What is the product of an object's mass and its velocity?
momentum
what is the condition at which a submarine is completely underwater but not sinking?
neutral buoyancy
Amonton's Law formula
p1/t1 =p2/t2
the density of an object
p=m/v
what is the SI unit of pressure
pascal
what is the rate of doing work
power
What is the force exerted per unit of area?
pressure
What is the ability for other scientists to reach the same conclusion by performing the same experiment?
reproducibility
force required to accelerate an object at a certain rate equals the object's mass times its desired acceleration?
second law of motion
what scalar quantity is the distance traveled by an object per unit of time?
speed
What is the science of shaping objects to allow the smooth flow of fluids around them and reduce drag?
streamlining
falling velocity at which the force of air resistance equals the object's weight and stops the object from accelerating?
terminal velocity
measure of how quickly an object moves
v=d/t
According to Archimedes, an object immersed in water appears to lose its?
weight
What is the amount of gravitational pull on an object?
weight
efficiency of a machine
η=wo/wi
