2746348
Descripción
Test por josierobins, actualizado hace más de 1 año
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Creado por josierobins
hace más de 9 años
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Pregunta 1
Pregunta
Compounds with structures composed in a network pattern _________.
Respuesta
-
Have high melting points
-
have high boiling points
-
are always solid at room temperature
-
all of the above
Pregunta 2
Pregunta
Compounds made of molecules can be _____________ at room temperature.
Respuesta
-
solid
-
liquid
-
gas
-
All of the above
Pregunta 3
Pregunta
In metals their energy levels overlap. This allows their _________ to be able flow freely from one atom to the next.
Respuesta
-
protons
-
neutrons
-
electrons
-
atoms
Pregunta 4
Pregunta
A chemical bond is a force that holds atoms or ions together in a compound.
Respuesta
- True
- False
Pregunta 5
Pregunta
When a compound is created it will have the sam properties compared to the properties of elements of which it is composed.
Respuesta
- True
- False
Pregunta 6
Pregunta
When a chemical reaction occurs molecules are broken and atoms are rearranged.
Respuesta
- True
- False
Pregunta 7
Pregunta
Chemical structure describes the way atoms are bonded within a compound
Respuesta
- True
- False
Pregunta 8
Pregunta
Bonds cannot bend, stretch, or rotate.
Respuesta
- True
- False
Pregunta 9
Pregunta
The chemical structure of a compound determines the properties of that compound. For instance a network of ions behave differently that a compound of molecules.
Respuesta
- True
- False
Pregunta 10
Pregunta
Compounds made of molecules have ________ bonds between each molecule, even though the bonds holding the atoms together within the molecule are ___________.
Respuesta
-
strong, weak
-
weak, strong
-
strong, strong
-
weak, weak
Pregunta 11
Pregunta
Atoms will bond with other atoms so they have ______ valence electrons (except for hydrogen and helium, which will still have two) in order to become chemically stable.
Respuesta
-
7
-
6
-
9
-
8
Pregunta 12
Pregunta
Metals tend to __________ valence electrons when they react to form an ionic bond, and non-metals tend to _________ valence electrons when they react to form a ionic bond.
Respuesta
-
gain, lose
-
lose, gain
-
increase, decrease
Pregunta 13
Pregunta
An ionic is made of a ________ bonded to a ____________.
Respuesta
-
metal, non-metal
-
non-metal, to a metal
Pregunta 14
Pregunta
Nonmetals are
Respuesta
-
flexible (they can bend and stretch without breaking,)
-
malleable (the can be pounded into thing sheets)
-
ductile (they can be drawn into thin wires)
-
none of the above
Pregunta 15
Respuesta
-
Space-filling model
-
Structural Formula
-
Ball and Stick
Pregunta 16
Respuesta
-
Space-fillling model
-
structural formula
-
ball and stick model
Pregunta 17
Respuesta
-
Space-filling model
-
Structural Formula
-
Ball and Stick model
Pregunta 18
Pregunta
How does a ionic compound form?
Respuesta
-
the attraction between oppositely charged ions
-
the attraction between the nucleus, and the shared electrons between them
-
the attraction between an atom's nucleus and the neighboring atom's electrons
Pregunta 19
Pregunta
How does a covalent bond form?
Respuesta
-
the attraction between oppositely charged ions
-
the attraction between the nucleus and the shared electrons between them
-
the attraction between an atom's nucleus and the neighboring atom's electrons
Pregunta 20
Pregunta
Ionic Compounds _______ conduct electricity when melted or dissolved.
Respuesta
-
will
-
will not
Pregunta 21
Pregunta
Covalent Compounds _________ conducted electricity when melted or dissolved.
Respuesta
-
will
-
will not
Pregunta 22
Pregunta
Which graph represents an object moving with a constant positive velocity?
Respuesta
-
A.
-
B.
-
C.
-
D.
Pregunta 23
Pregunta
Which graph represents an object at rest?
Respuesta
-
A.
-
B.
-
C.
-
D.
Pregunta 24
Pregunta
30 m/s westward represents a ____________.
Respuesta
-
Speed
-
Velocity
-
both speed and velocity
-
neither
Pregunta 25
Pregunta
If you jog for 1hr and travel 10 km, 10km/h describes your ____________.
Respuesta
-
momentum
-
displacement
-
average speed
-
acceleration
Pregunta 26
Pregunta
An object's speed is a measure of ___________.
Respuesta
-
how fast the object is moving
-
the object's direction
-
the object's displacement per unit of time
-
all of the above
Pregunta 27
Pregunta
A Car travels a distance of 210 miles in exactly 4h. The driver calculates that he traveled 52.5 mi/h. Which of the following terms most nearly describes his calculation.
Respuesta
-
average speed
-
instantaneous speed
-
instantaneous acceleration
-
displacement
Pregunta 28
Pregunta
Which graph represents a constant positive acceleration?
Respuesta
-
A.
-
B.
-
C.
-
D.
Pregunta 29
Pregunta
In order to determine if an object is moving, you must observe the object in relation to a(n) reference point.
Respuesta
- True
- False
Pregunta 30
Pregunta
What is distance?
Respuesta
-
how far you've traveled
-
how far apart you are from your starting point
-
how far you've traveled AND how far apart you are from your starting point
-
none of the above
Pregunta 31
Pregunta
What is displacement?
Respuesta
-
how far you've traveled
-
how far apart you are from your starting point
-
how far you've traveled AND how far apart you are from your starting point
-
none of the above
Pregunta 32
Pregunta
What is acceleration
Respuesta
-
A change in speed
-
A change in direction
-
A change in speed and direction
-
None of the above
Pregunta 33
Pregunta
The size of static friction is usually larger than the size of your sliding friction force
Respuesta
- True
- False
Pregunta 34
Pregunta
The size of your static friction is usually larger than the size of rolling friction force
Respuesta
- True
- False
Pregunta 35
Pregunta
The size of your rolling friction force was larger than the size of your sliding friction force.
Respuesta
- True
- False
Pregunta 36
Pregunta
If you pulled a book forward, at a constant speed, and the spring scale read 5 N, which of the following conclusions would be correct.
Respuesta
-
The forces are unbalanced because the book is moving at a constant speed
-
The force of friction would be 0 Newtons because the the Newt force is 0 Newtons
-
The force of friction would 5 newton's because the net force is 0 Newtons.
-
All of the above are incorrect
Pregunta 37
Pregunta
Which of the following is not accelerated motion
Respuesta
-
a ball being juggled
-
a woman walking at 2.5 m/s along a straight road
-
a satellite circling Earth
-
a braking cyclist
Pregunta 38
Pregunta
A tug of war that results in one team pulling the other across the line is an example of ____________.
Respuesta
-
action forces
-
reaction forces
-
balanced forces
-
unbalanced forces
Pregunta 39
Pregunta
Moving from 0 m/s to 25 m/s in 8.0 seconds equals an average acceleration of _________.
Respuesta
-
.32 m/s
-
.32 m/s^2
-
3.1 m/s
-
3.1 m/s^2
Pregunta 40
Pregunta
A cyclist is traveling at an initial speed of 10.0 m/s. She accelerates at a rate of 0.500 m/s^2. What is her final speed after 9.0 seconds?
Respuesta
-
14.5 m/s
-
14.5 m/s^2
-
5.5 m/s
-
5.5 m/s^2
Pregunta 41
Pregunta
The friction between the bristles of your toothbrush and the surfaces of your teeth is an example of __________ friction.
Respuesta
-
Rolling
-
Sliding
-
Static
-
Fluid
Pregunta 42
Pregunta
One way to reduce friction in a car engine is to add a(n) lubrication
Respuesta
- True
- False
Pregunta 43
Pregunta
What are the fundamental forces?
Respuesta
-
gravity
-
electromagnetic force
-
strong nuclear force
-
weak nuclear force
-
all of the above
-
gravity and electromagnetic force only
Pregunta 44
Pregunta
The net force is the combination of all forces acting on an object.
Respuesta
- True
- False
Pregunta 45
Pregunta
Speed measured in an infinitely small time interval, like a speedometer, is called
Respuesta
-
instantaneous acceleration
-
instantaneous speed
-
net force
Pregunta 46
Pregunta
What is the measurement that correctly describes speed?
Respuesta
-
10km/min
-
9.81 m/s^2
-
5N
-
5m
-
25 m/s eastward
Pregunta 47
Pregunta
The measurement that correctly describes velocity is ______.
Respuesta
-
10 km/min
-
9.81 m/s^2
-
5N
-
5m
-
25 m/s eastward
Pregunta 48
Pregunta
Two different ways that static friction and kinetic friction differ from each other is static is the friction between two surfaces at rest and in contact. Kinetic friction is friction between a surface the is moving and another surface. Static Friction is greater than kinetic friction.
Respuesta
- True
- False
Pregunta 49
Pregunta
The law that states that the unbalanced force acting on an object equals the object's mass times it acceleration is
Respuesta
-
Newtons First Law of Motion
-
Newton's Second Law of Motion
-
Newton's Third Law of Motion
-
the law of conservation of momentum
Pregunta 50
Pregunta
The law that states that for every action force there is an equal and opposite reaction force is
Respuesta
-
newton's first law of motion
-
newton's second law of motion
-
newton's third law of motion
-
law of conservation of momentum
Pregunta 51
Pregunta
The law that states that every object maintains a constance velocity unless acted on by an unbalanced force is
Respuesta
-
Newton's First Law of Motion
-
Newton's second law of motion
-
newton's third law of motion
-
law of conservation of momentum
Pregunta 52
Pregunta
Which of the following is correct?
Respuesta
-
w=mg
-
w=m/g
-
w=g/m
-
w=g+m
Pregunta 53
Pregunta
What is the unbalanced force that slows down a ball rolling across the floor?
Respuesta
-
the force of friction
-
the force of gravity
-
the force of inertia
-
the force of momentum
Pregunta 54
Pregunta
In absense of air resistance, how would the acceleration of a 1.5 kg book and the acceleration of 15 kg rock differ if the objects were dropped from the same height?
Respuesta
-
The book would accelerate twice as fast as the rock
-
The rock would accelerate twice as fast as the book
-
The book would accelerate ten times as fast as the rock
-
They would not differ; they would be the same
Pregunta 55
Pregunta
Astronauts "float" when inside an orbiting spaceship because they are
Respuesta
-
weightless
-
in a vaccum
-
in free fall
-
outside earth's gravity
Pregunta 56
Pregunta
Which of the following is an example of projectile motion?
Respuesta
-
a rolling bowling ball
-
a dart thrown at a dart board
-
a balloon risking in the air
-
a high speed train accelerating
Pregunta 57
Pregunta
Whenever a force is exerted, another force occurs that is _______ in size, and ________ in direction
Respuesta
-
equal, same
-
smaller, same
-
equal, opposite
-
smaller, opposite
Pregunta 58
Pregunta
The SI unit of force, named after the scientist who described the relationship between motion and force, is called the
Respuesta
-
Newton
-
einstein
-
curie
-
pasteur
Pregunta 59
Pregunta
If the net force on an object is zero, then the object has
Respuesta
-
reaction forces
-
action forces
-
unbalanced forces
-
balanced forces
Pregunta 60
Pregunta
According to the universal gravitation equation, the gravitional force between two objects decreases as ________ increases.
Respuesta
-
distance
-
mass
-
both
-
neither
Pregunta 61
Pregunta
A situation known as free fall occurs when astronauts and their surroundings all accelerate at at the same rate. When this occurs the astronauts seem to be weightless.
Respuesta
- True
- False
Pregunta 62
Pregunta
What were the minumun requirements to earn a 90% on your bottle rocket?
Respuesta
-
empty carbonated bottle
-
fins
-
nose
-
all of the above
-
none of the above
Pregunta 63
Pregunta
A object stops accelerating when the force of air resistance becomes ______ the gravitational force on the object.
Respuesta
-
more than
-
less than
-
equal to
Pregunta 64
Pregunta
When the weight and air resistance are equal, a falling object reaches it's
Respuesta
-
net force
-
instantaneous acceleration
-
projectile motion
-
terminal velocity
Pregunta 65
Pregunta
Our bottle rockets works from the upward push on the ________ which is equal to the downward push on the fluid.
Respuesta
-
fluid
-
bottle
-
air
Pregunta 66
Pregunta
The force of gravity ___________ increase as mass ___________. These are _________ proportional
Respuesta
-
increases, decreases, inversely
-
increases, increases, directly
Pregunta 67
Pregunta
The force of gravity __________ as distance ________. These are _______ proportional.
Respuesta
-
increases, decreases, inversely
-
increases, increases, directly
Pregunta 68
Pregunta
You flicked an index card forward, while the penny on top of the card remained stationary.
Respuesta
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Pregunta 69
Pregunta
Your binder remained stationary, being pulled down by gravity and supported by the desk.
Respuesta
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Pregunta 70
Pregunta
You rolled a heavy ball and a light ball with the same force to view their acceleration.
Respuesta
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Pregunta 71
Pregunta
You rolled two balls with with the same mass, but with different forces to view their acceleration.
Respuesta
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Pregunta 72
Pregunta
You dropped a ball at the same time you threw a ball to see which hit the ground first.
Respuesta
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Pregunta 73
Pregunta
Your bottle rocket exerted a downward force as the pressurized air escaped from the bottle, which exerted a an equal but opposite force in the opposite dirction causing the rocket to move upward.
Respuesta
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Pregunta 74
Pregunta
The balloon-powered pinwheel spins because of action-reaction forces.
Respuesta
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Pregunta 75
Pregunta
The Newton's cradle had one ball dropped, which hit the group of balls, and then one ball was pushed up on the opposite side.
Respuesta
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Pregunta 76
Pregunta
If you drop a medicine ball and a basket ball at the same time, how can they accelerate at the same rate, regardless of mass?
Respuesta
-
They don't
-
The more mass an object has the more inertia. The less mass the object has the less inertia.
-
Even though the medicine ball has more mass, therefore more gravity, it also has more inertia. Object near earth fall at 9.8 m/s^2 because of this.
Pregunta 77
Pregunta
Two components of projectile motion are horizontal gravitational acceleration and vertical gravitational acceleration.
Respuesta
- True
- False
Pregunta 78
Pregunta
The forces that hold different atoms or ions together are
Respuesta
-
electric currents
-
chemical bonds
-
physical bonds
-
nuclear forces
Pregunta 79
Pregunta
An ionic bond is a bond that forms between
Respuesta
-
ions with opposite charges
-
atoms with neutral charges
-
one atom's nucleus and another atom's electrons
-
the electrons of two different atoms
Pregunta 80
Pregunta
In which type of bond do atoms share electrons?
Respuesta
-
ionic
-
covalent
-
metallic
-
polatomic
Pregunta 81
Pregunta
Is this an endothermic or exothermic reaction?
Respuesta
-
endothermic
-
exothermic
Pregunta 82
Pregunta
If one measured the temperature of the chemicals reacting in Figure 2, what would have happened to the temperature as the chemical reaction progressed?
Respuesta
-
the temperature would drop
-
the temperature would rise
-
the temperature would remain constant
-
this cannot be determined with the information provided
Pregunta 83
Pregunta
The arrangement of _______ and _________ within a substance is its chemical structure
Respuesta
-
atoms
-
electrons
-
protons
-
elements
-
ions
Pregunta 84
Pregunta
In ionic compounds, the positively charged ions are formed from non-metal elements
Respuesta
- True
- False
Pregunta 85
Pregunta
What is the name of BeF^2
Respuesta
-
Beryllium Flouride
-
Beryllium Floroxide
Pregunta 86
Pregunta
What is the chemical formula for Potassium Oxide is K^2O
Respuesta
- True
- False
Pregunta 87
Pregunta
Photosynthesis is an example of a(n) _________ chemical reaction in which plants absorb the sunlight to make glucose and oxygen
Respuesta
-
endothermic
-
exothermic
Pregunta 88
Pregunta
The energy need to start a chemical reaction is called
Respuesta
-
activation energy
-
reactancts
-
kinetic energy
Pregunta 89
Pregunta
Describe how the chemical structure of a compound affects its properties. Use the evidence collected in our lab testing the properties of salt and sugar to support your arguments.
Respuesta
-
When a compound has strong bonds or weak bonds, it affect their properties. For example, sugar had a low melting point because it had weak bonds. Salt, on the other hand, would not melt because it had a high melting point the requires much more heat because it has strong bonds.
-
When a compound has strong bonds or weak bonds, it affect their properties. For example, salt had a low melting point because it had weak bonds. sugar, on the other hand, would not melt because it had a high melting point the requires much more heat because it has strong bonds.
Pregunta 90
Pregunta
What does W for J stand for?
Respuesta
-
Work
-
Watt
Pregunta 91
Pregunta
What does W the unit stand for?
Respuesta
-
Watt
-
Work
Pregunta 92
Pregunta
What conclusion(s) could draw from the level lab #1 which you completed in class
Respuesta
-
Levers do not have friction
-
the input work and the output work in a lever are equal
-
The IMA and AMA are equal
-
The Efficiency is 100 %
-
All of the above are true
Pregunta 93
Pregunta
Machines make work less
Respuesta
- True
- False
Pregunta 94
Pregunta
The AMA must alway be greater than the IMA when there is NO friction
Respuesta
- True
- False
Pregunta 95
Pregunta
A first class lever can have an input force greater than the output force
Respuesta
- True
- False
Pregunta 96
Pregunta
A second-class lever always has an input force that is less than the output force.
Respuesta
- True
- False
Pregunta 97
Pregunta
Increasing the angle a ramp makes with the horizontal decrease the mechanical advantage
Respuesta
- True
- False
Pregunta 98
Pregunta
Increasing the height of a ramp increases the efficiency of a ramp
Respuesta
- True
- False
Pregunta 99
Pregunta
A meteorologist trying to predict global warming would consider Earth to be a closed system
Respuesta
- True
- False
Pregunta 100
Pregunta
A pair of tweezers is
Respuesta
-
a first-class lever
-
a compound machine made of two third-class levers
-
a compound machine made of two second-class levers
-
a kind of wedge
Pregunta 101
Pregunta
What is the mechanical advantage of a ramp 2.0 m long and .50 m tall?
Respuesta
-
1.0
-
2.5
-
4
-
None of the above
Pregunta 102
Pregunta
A pulley with a mechanical advantage of 5.00 is used to lift a bucket weighing 285 N. How much force must be used to lift the bucket?
Respuesta
-
57N
-
280 N
-
285N
-
1425N
Pregunta 103
Pregunta
An astronaut with a mass of 91kg is .30 m above the moon's surface. The astronaut's potential energy is 46J. Calculate the free fall acceleration on the moon.
Respuesta
-
.15m/s^2
-
1.7 m/s^2
-
6.6 m/s^2
-
9.8 m/s^2
Pregunta 104
Pregunta
The law of conservation of energy states that energy
Respuesta
-
is created from motion
-
cannot be created or destroyed
-
is always equal and opposite
-
can only be converted into heat
Pregunta 105
Pregunta
Which of the following processes requires the most work?
Respuesta
-
A 10kg weight rests on the table
-
A person holds a 1kg weight still with outstretched arms
-
a person lifts a 1kg weight 1m off the floor
-
a 10 kg ball is rolled .1 N across the floor at a constant speed for 10m
Pregunta 106
Pregunta
all levers have a rigid arm that turns around a point called the fulcrum
Respuesta
- True
- False
Pregunta 107
Pregunta
a(n) wedge is a inclined plane wrapped around a cylinder
Respuesta
- True
- False
Pregunta 108
Pregunta
The process that transform light into chemical energy in plants is called photosynthesis
Respuesta
- True
- False
Pregunta 109
Pregunta
What does I in IMA stand for?
Respuesta
-
Ideal
-
Inverse
Pregunta 110
Pregunta
What does the A in AMA stand for?
Respuesta
-
Actual
-
Adverse
Pregunta 111
Pregunta
If the mechanical advantage is greater than one, it means that the machine ______________. In normal everyday English, this means that your force is ______ and the machines force is __________.
Respuesta
-
multiplies the force, less, more
-
multiplies the distance, less, more
-
multiplies the force, more, less
-
multiplies the distance, more, less
Pregunta 112
Pregunta
If the mechanical advantage is less than one, it means that the machine ______________. In normal everyday, this means that your distance is _______ and the machine's distance is __________.
Respuesta
-
multiplies the distance, less, more
-
multiplies the distance, more, less
Pregunta 113
Pregunta
If the MA is equal to one, it means that the machine _________
Respuesta
-
changes the direction
-
multiplies the force
-
multiplies the distance
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