NEW Abeka 9th Grade Science Matter & Energy Test 3
Which of the expresses 2702 correctly in scientific notation
2.702 x 10 (3 power)
What is the magnitude of the force required to accelerate a 2000 KG truck at 10 MS squared
20,000 (f=ma)
What is the density of an object with a mass of 27G and a volume of 9.0 CM cubed
3.0g/cm cubed
How many significant digits are in 0.02063
4
What is the average speed of a person who walks 28 KM in 7.0 H
4.0km/h
What is a car's acceleration in the direction of motion when velocity changes from 20.0 to 60.0m/2 in 10s?
4.0ms = 60-20/10
what is the efficiency of a machine that has a work output of 630J and at work input of 700J
90.0 is 630/700
The multiplication of the input force that a machine provides under a real world conditions is what
AMA
The closeness of a measurement to the quantities actual value is
Accuracy
What law States that temperature and pressure are directly related what volume is held constant
Amontons Law
What principle states that the buoyant force experience by an object is exactly equal to the weight of the fluid displaced
Archimedes principle
What law states that if the pressure of a gas is constant, it's volume and temperature are directly proportional
Charle's law
In the engineering design process, what is any characteristic required for design to function
Criteria
what valid form of interference suppose is that when the consequent is false the antecedent must be false
Denying the consequent
Pascals' principle
F input/A input = F output/A output
The small piston of a hydraulic press has an area of 2.0 CM squared, and the large piston has an area of 16 CM squared. Calculate the output force of the large piston it's the small piston has a force of 4.0 and applied to it
F-input/A-input = F-output/A-output/ 4.0/2.0= F-output/ 16 = 32N
Newtons second law of motion
F=ma -->
Michael is conducting an experiment to see which toys his cat prefers. He tests three different type of toys in his bedroom: a small foam ball, a plastic mouse, and a feather toy. Each day after school, he takes his cat to his bedroom to test and record results. What are two important controlled variables for his experiment
His bedroom & time of day
A tentative explanation to describe a scientific process is
Hypothesis
What is the ratio of input distance to output distance
IMA
The phenomenon of a spinning cylinder or ball causing lift is the what affect
Magnus
What is the product of an objects mass and velocity
Momentum
the efficiency of a machine
N=Wo/Wi
What is the condition at which a submarine is completely underwater but not sinking
Neutral buoyancy
Amontons's law
P1/T1=P2/V2
Boyle's law
P1V1=P2V2
the density of an object
P= m/V
What law State that the force required to accelerate an object at a certain rate equals the objects mass times it's desired acceleration
Second law of motion
Who discovered the laws of motion and gravitation
Sir Isaac newton
On a consistently breezy day, Grace is flying a large foam airplane. A sudden gust of wind pushes the airplane nose up, which causes the airplane to plumb it to the ground. Why would the airplane suddenly fall?
The airplane exceeded it's critical angle of attack and no more lift developed
When you shake a carbonated beverage, why does the beverage fizz and possibly explode when the top is opened
The pressure from the gas inside the container
When it's of water spills on a table, why does the water bead and puddle instead of flattening to the smooth service
The water coheres and pulls back from the table
Charles Law
V1/T1=V2/T2
measure of how quickly an object moves
V=d/t
The term that refers to any change in velocity is
acceleration
The attractive force between unlike molecules
adhesion
What is measured altitude
altimeter
Device that uses an airtight metal box with thin flexible walls to measure pressure is what
aneroid barometer
What is an upward force exerted by a fluid on a solid object placed in the fluid
buoyancy
The phenomenon in which a liquid in a thin tube rises above or false beneath its own level is what
capillarity
What causes an object to travel in a curved path rather than a straight line
centripetal force
What class of lever has the input force applied between the fulcrum and output force
class 3
The ability of a gas to be easily squeezed and compacted into smaller containers is what
compressibility
What is the fluid friction that tends to slow an object as it moves through a fluid
drag
Fallacy occurs when a term is misleadingly used with two different meanings in a single argument
equivocation
What factor that is changed to test a hypothesis
independent variable
What is a conclusion based on reasoning from evidence
inference
SI unit of work
joule
What is the force on an object that is generated by relative motion between the object and a fluid and is perpendicular to the direction of fluid flow
lift
State of matter in which molecules can move freely and conform to the shape of the container that would mean attracted to each other is what state
liquid
amount of matter in an object is
mass
What system of measurement was designed by French scientist to be simpler to learn and use the FPS system
metric system
sample of gas occupies 4.0 L at a pressure of 102.2 K PA. What is the new volume if the pressure is increased to 116.8 K PA
p1v1=p2v2 (102.2)(4.0) = 3.5L
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 ability for other scientist to reach the same conclusion by performing the same experiment under different conditions and by performing other experiments to test the same hypothesis
reproducibility
What scalar quantity Is the distance traveled by an object per unit time.
speed
What is the science of shaping objects to allow the smooth flow of fluids around them and reduce drag
streamlining
What is the name for a falling velocity at which the force of air resistance equals the objects weight and stops the object from accelerating
terminal velocity
What is out of gravitational pull on an object
weight
according to Archimedes, an object immersed in water appears to lose its what?
weight
