physics test 2 Flashcards
1
Q
List the six steps of the scientific method
A
step 1recognize a problem. Step 2make a hypothesis. Step 3make predictions for hypothesis. Step 4perform experiments. Step 5form a conclusion. Step 6 communicate your results.
2
Q
what is a hypothesis?
A
an educated guess that must be tested. This is never truly proven.
3
Q
in science measurements are taken into ways. Name the two ways
A
quantitative measurement produces a definitive specific value. Qualitative measurement is non-numerical descriptions
4
Q
in the metric system how do you Measure link?
A
meters
5
Q
in the metric system mass is measured
A
in kilograms
6
Q
in the metric system newtons measure
A
weight
7
Q
Time is measured in
A
seconds
8
Q
in the metric system leaders or centimeters cubed (cm3) measure
A
volume
9
Q
in metrics temperature is measured with
A
Celsius
10
Q
Tera (T)
A
trillion
11
Q
giga (G)
A
Billion
12
Q
mega (M)
A
million
13
Q
Thousand
A
kilo (K)
14
Q
hecto (H)
A
hundred
15
Q
Deca (D)
A
10
16
Q
Pico (P)
A
trillionth
17
Q
Nano (n)
A
billionth
18
Q
Micro (m)
A
millionth
19
Q
milli (m)
A
Thousandth
20
Q
centi (c)
A
hundredth
21
Q
deci (d)
A
tenth
22
Q
in the English system link is measured by
A
foot, yard, mile
23
Q
in the English system wait is measured by
A
ounces or pounds
24
Q
in English system mass is measured by
A
ounces or pounds
25
in English system temperature is measured by
Fahrenheit
26
in English that system time is measured by
Second the same as the metric system
27
in the in the system volume is measured by
gallons, quarts, pints
28
in science unit conversion is only able to be converted to these three
metric to English, English to metric, metric to metric
29
one-mile is equal to how many feet
5280 feet
30
1 inch is equal to how many centimeters
2.54 cm
31
One Newton equals how many pounds
0.2248 pounds
32
1 kg is equal to how many pounds
2.2 pounds
33
1 cm³ is equal to how many milliliters (mL)
1 mL
34
1 gallon is equal to how many liters
3.7 9L
35
1 m³ is equal to how many cubic feet
35.3 ft.³
36
what is the conversion from Celsius to Fahrenheit
C=(5/9)(F-32)
37
what is the conversion from Fahrenheit to Celsius
F=(95)(c)+32
38
what is a unit multiplier?
A fraction that allows conversion from one unit to another. A unit multiplier allows you to cancel the units you don't want so that your left only with unit you do want
39
what is the definition of speed?
The average speed is the distance traveled divided by the time it took to travel this distance
s= distance/Time
speed is also the magnitude of the velocity
40
what is the definition of velocity
A physical vector quantity of magnitude and direction I needed to find it
41
what is the difference between speed and velocity
velocity is the change in motion
42
define precision
how specific your answer is
43
define accuracy
how correct your answer is
44
what is margin of error?
The amount of acceptable Error in an experiment
45
define displacement
The overall change in position of an object. If an object returns to its original position it's Displacement equals zero
46
define units of acceleration
The SI unit of acceleration is the meter per second squared. m/s2
or more meaningfully meters per second per second
47
instantaneous velocity
v=at accelerating object time can be found by multiplying the acceleration by the number of seconds.
If the object had in tail velocity other than zero at the product of acceleration in time to this initial velocity v=v0+va
48
and object at rest will stay at rest unless acted on by an unbalanced force and an object in motion will stay in motion at the same velocity unless acted on by an unbalanced force
newtons first law
49
inertia
The tendency of things to resist change in motion. Every object made up of matter has inertia. The amount of mass determines the objects inertia.
50
The quantity of matter in an object. It also is a measure of that objects inertia
mass
51
weight
The force upon an object caused by gravity. The metric unit of measure is in Newton
52
The acceleration of an object is directly proportional to the net force acting on that object In the direction of the net force and inversely proportional to the mass of the object
newtons second law of motion
53
The equation for newtons second law of motion
A=f/m
f=ma
m=f/a
54
Force
push or pull. It involves both magnitude and direction.
55
net force
The sum of the forces acting on an object makes acceleration
56
vector vs scalar quantity
Victor has both magnitude and direction while scaler quantity only has direction
57
when object his balance forces acting on it there are two types dynamic and static
equilibrium
58
normal force
Force produced by a surface
59
tension force
Force produced by a rope
60
friction
The force resisting the relative motion of salad services, fluid layers, and material elements sliding against each other. There are several types of friction
61
communicate your results is what step in the scientific method
The sixth or last step
62
true or false? A hypothesis can never be proven your experiments
true
63
do you know of a weight in the metric system is the
Gram or kilogram
64
convert 0.000238 Megabytes to bytes
23,800 bytes
65
convert micrometers 3000 to dm
3.0 dm
66
convert 0.0003 km to inches
12.12 inches
67
Comfort 34°C to Fahrenheit
93.2 Fahrenheit degrees
68
what is the unit of volume in the metric system
cubic centimeter, leaders, m3
69
The amount of acceptable air in an experiment
margin of error
70
The prefix for billionth is
giga
71
The prefix for hundred is
hecto
72
abbreviation for the prefix micro is
that funky little m
73
choose the prefix that would describe the largest quantity. Deca? Kilo? Milli? Pico?
kilo
74
what is a reference point?
an object that is at rest and is used to judge if other objects are moving
75
what is the formula for total distance?
average speed/total time
76
A jogger runs 1 km in three minutes. Calculate her average speed in m/s
33.3 m/s
77
convert 78.9 m/s to mph
176.5 mph
78
velocity can best be defined as
speed and direction
79
you're on a treadmill that is moving at 4 mph south. What must your velocity be so that the resultant velocity will ensure you stay on the treadmill?
4 mph north
80
would it be possible for you to run around in a circle at constant velocity?
perhaps, it depends on the size of the circle
81
and I just goes from 32 m/s to rest in four seconds. Calculate its acceleration
8 m/s
82
under what condition would object average an instantaneous velocity definitely be the same
The object has a constant velocity
83
true or false? A plane traveling a constant velocity is not definitely traveling a constant speed and a plane traveling a constant speed is definitely traveling a constant velocity
true
84
how long would it take for a car traveling at an average speed of 55 mph to travel 116 miles
0.45 hours
85
is this a scientifically accurate statement? My acceleration cause me to reach a velocity of 3 m/s squared
yes
86
A llama runs 100 m to the right then turns around and runs 80 m to the left. The entire time was 10 seconds. Calculate its velocity.
2 m/s
87
quantities that can be represented completely with numbers and units are called
scalars or scalar quantities
88
vector quantity or vector
represented by both a magnitude (number and units) and a direction.
89
instantaneous acceleration
acceleration at a particular instance
90
average acceleration
deceleration an object experiences over a period of time
91
Constant or uniform acceleration
when an object accelerates at a constant rate. When an object acceleration is constant it's instantaneous acceleration is the same as every acceleration for that period of time
92
uniform velocity is represented by what type of graph
A straight line segment graph
93
define force
A push or a pole. Something that is capable of changing an objects velocity
94
inertia
and object tendency to resist changes in motion
95
friction
A force that exist between two objects that are touching, which raises their motion relative to each other
96
what are the two types of friction
static friction went to objects are not living relative to each other. Kinetic Friction when one object is living relative to the other
97
weight
The force of attraction between two objects due to gravity
98
Vector
A quantity having both magnitude and direction
99
velocity
speed in a particular direction. velocity is the vector counterpart to the scaler quantity called speed.
100
acceleration
The rate at which velocity changes. The term acceleration means approximately the same thing in physics as it doesn't every day life except that it is a vector quantity so direction is important.
