2746348
Descrição
Quiz por josierobins, atualizado more than 1 year ago
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Criado por josierobins
aproximadamente 9 anos atrás
|
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Questão 1
Questão
Compounds with structures composed in a network pattern _________.
Responda
-
Have high melting points
-
have high boiling points
-
are always solid at room temperature
-
all of the above
Questão 2
Questão
Compounds made of molecules can be _____________ at room temperature.
Responda
-
solid
-
liquid
-
gas
-
All of the above
Questão 3
Questão
In metals their energy levels overlap. This allows their _________ to be able flow freely from one atom to the next.
Responda
-
protons
-
neutrons
-
electrons
-
atoms
Questão 4
Questão
A chemical bond is a force that holds atoms or ions together in a compound.
Responda
- True
- False
Questão 5
Questão
When a compound is created it will have the sam properties compared to the properties of elements of which it is composed.
Responda
- True
- False
Questão 6
Questão
When a chemical reaction occurs molecules are broken and atoms are rearranged.
Responda
- True
- False
Questão 7
Questão
Chemical structure describes the way atoms are bonded within a compound
Responda
- True
- False
Questão 8
Questão
Bonds cannot bend, stretch, or rotate.
Responda
- True
- False
Questão 9
Questão
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.
Responda
- True
- False
Questão 10
Questão
Compounds made of molecules have ________ bonds between each molecule, even though the bonds holding the atoms together within the molecule are ___________.
Responda
-
strong, weak
-
weak, strong
-
strong, strong
-
weak, weak
Questão 11
Questão
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.
Responda
-
7
-
6
-
9
-
8
Questão 12
Questão
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.
Responda
-
gain, lose
-
lose, gain
-
increase, decrease
Questão 13
Questão
An ionic is made of a ________ bonded to a ____________.
Responda
-
metal, non-metal
-
non-metal, to a metal
Questão 14
Questão
Nonmetals are
Responda
-
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
Questão 15
Responda
-
Space-filling model
-
Structural Formula
-
Ball and Stick
Questão 16
Responda
-
Space-fillling model
-
structural formula
-
ball and stick model
Questão 17
Responda
-
Space-filling model
-
Structural Formula
-
Ball and Stick model
Questão 18
Questão
How does a ionic compound form?
Responda
-
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
Questão 19
Questão
How does a covalent bond form?
Responda
-
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
Questão 20
Questão
Ionic Compounds _______ conduct electricity when melted or dissolved.
Responda
-
will
-
will not
Questão 21
Questão
Covalent Compounds _________ conducted electricity when melted or dissolved.
Responda
-
will
-
will not
Questão 22
Questão
Which graph represents an object moving with a constant positive velocity?
Responda
-
A.
-
B.
-
C.
-
D.
Questão 23
Questão
Which graph represents an object at rest?
Responda
-
A.
-
B.
-
C.
-
D.
Questão 24
Questão
30 m/s westward represents a ____________.
Responda
-
Speed
-
Velocity
-
both speed and velocity
-
neither
Questão 25
Questão
If you jog for 1hr and travel 10 km, 10km/h describes your ____________.
Responda
-
momentum
-
displacement
-
average speed
-
acceleration
Questão 26
Questão
An object's speed is a measure of ___________.
Responda
-
how fast the object is moving
-
the object's direction
-
the object's displacement per unit of time
-
all of the above
Questão 27
Questão
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.
Responda
-
average speed
-
instantaneous speed
-
instantaneous acceleration
-
displacement
Questão 28
Questão
Which graph represents a constant positive acceleration?
Responda
-
A.
-
B.
-
C.
-
D.
Questão 29
Questão
In order to determine if an object is moving, you must observe the object in relation to a(n) reference point.
Responda
- True
- False
Questão 30
Questão
What is distance?
Responda
-
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
Questão 31
Questão
What is displacement?
Responda
-
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
Questão 32
Questão
What is acceleration
Responda
-
A change in speed
-
A change in direction
-
A change in speed and direction
-
None of the above
Questão 33
Questão
The size of static friction is usually larger than the size of your sliding friction force
Responda
- True
- False
Questão 34
Questão
The size of your static friction is usually larger than the size of rolling friction force
Responda
- True
- False
Questão 35
Questão
The size of your rolling friction force was larger than the size of your sliding friction force.
Responda
- True
- False
Questão 36
Questão
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.
Responda
-
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
Questão 37
Questão
Which of the following is not accelerated motion
Responda
-
a ball being juggled
-
a woman walking at 2.5 m/s along a straight road
-
a satellite circling Earth
-
a braking cyclist
Questão 38
Questão
A tug of war that results in one team pulling the other across the line is an example of ____________.
Responda
-
action forces
-
reaction forces
-
balanced forces
-
unbalanced forces
Questão 39
Questão
Moving from 0 m/s to 25 m/s in 8.0 seconds equals an average acceleration of _________.
Responda
-
.32 m/s
-
.32 m/s^2
-
3.1 m/s
-
3.1 m/s^2
Questão 40
Questão
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?
Responda
-
14.5 m/s
-
14.5 m/s^2
-
5.5 m/s
-
5.5 m/s^2
Questão 41
Questão
The friction between the bristles of your toothbrush and the surfaces of your teeth is an example of __________ friction.
Responda
-
Rolling
-
Sliding
-
Static
-
Fluid
Questão 42
Questão
One way to reduce friction in a car engine is to add a(n) lubrication
Responda
- True
- False
Questão 43
Questão
What are the fundamental forces?
Responda
-
gravity
-
electromagnetic force
-
strong nuclear force
-
weak nuclear force
-
all of the above
-
gravity and electromagnetic force only
Questão 44
Questão
The net force is the combination of all forces acting on an object.
Responda
- True
- False
Questão 45
Questão
Speed measured in an infinitely small time interval, like a speedometer, is called
Responda
-
instantaneous acceleration
-
instantaneous speed
-
net force
Questão 46
Questão
What is the measurement that correctly describes speed?
Responda
-
10km/min
-
9.81 m/s^2
-
5N
-
5m
-
25 m/s eastward
Questão 47
Questão
The measurement that correctly describes velocity is ______.
Responda
-
10 km/min
-
9.81 m/s^2
-
5N
-
5m
-
25 m/s eastward
Questão 48
Questão
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.
Responda
- True
- False
Questão 49
Questão
The law that states that the unbalanced force acting on an object equals the object's mass times it acceleration is
Responda
-
Newtons First Law of Motion
-
Newton's Second Law of Motion
-
Newton's Third Law of Motion
-
the law of conservation of momentum
Questão 50
Questão
The law that states that for every action force there is an equal and opposite reaction force is
Responda
-
newton's first law of motion
-
newton's second law of motion
-
newton's third law of motion
-
law of conservation of momentum
Questão 51
Questão
The law that states that every object maintains a constance velocity unless acted on by an unbalanced force is
Responda
-
Newton's First Law of Motion
-
Newton's second law of motion
-
newton's third law of motion
-
law of conservation of momentum
Questão 52
Questão
Which of the following is correct?
Responda
-
w=mg
-
w=m/g
-
w=g/m
-
w=g+m
Questão 53
Questão
What is the unbalanced force that slows down a ball rolling across the floor?
Responda
-
the force of friction
-
the force of gravity
-
the force of inertia
-
the force of momentum
Questão 54
Questão
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?
Responda
-
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
Questão 55
Questão
Astronauts "float" when inside an orbiting spaceship because they are
Responda
-
weightless
-
in a vaccum
-
in free fall
-
outside earth's gravity
Questão 56
Questão
Which of the following is an example of projectile motion?
Responda
-
a rolling bowling ball
-
a dart thrown at a dart board
-
a balloon risking in the air
-
a high speed train accelerating
Questão 57
Questão
Whenever a force is exerted, another force occurs that is _______ in size, and ________ in direction
Responda
-
equal, same
-
smaller, same
-
equal, opposite
-
smaller, opposite
Questão 58
Questão
The SI unit of force, named after the scientist who described the relationship between motion and force, is called the
Responda
-
Newton
-
einstein
-
curie
-
pasteur
Questão 59
Questão
If the net force on an object is zero, then the object has
Responda
-
reaction forces
-
action forces
-
unbalanced forces
-
balanced forces
Questão 60
Questão
According to the universal gravitation equation, the gravitional force between two objects decreases as ________ increases.
Responda
-
distance
-
mass
-
both
-
neither
Questão 61
Questão
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.
Responda
- True
- False
Questão 62
Questão
What were the minumun requirements to earn a 90% on your bottle rocket?
Responda
-
empty carbonated bottle
-
fins
-
nose
-
all of the above
-
none of the above
Questão 63
Questão
A object stops accelerating when the force of air resistance becomes ______ the gravitational force on the object.
Responda
-
more than
-
less than
-
equal to
Questão 64
Questão
When the weight and air resistance are equal, a falling object reaches it's
Responda
-
net force
-
instantaneous acceleration
-
projectile motion
-
terminal velocity
Questão 65
Questão
Our bottle rockets works from the upward push on the ________ which is equal to the downward push on the fluid.
Responda
-
fluid
-
bottle
-
air
Questão 66
Questão
The force of gravity ___________ increase as mass ___________. These are _________ proportional
Responda
-
increases, decreases, inversely
-
increases, increases, directly
Questão 67
Questão
The force of gravity __________ as distance ________. These are _______ proportional.
Responda
-
increases, decreases, inversely
-
increases, increases, directly
Questão 68
Questão
You flicked an index card forward, while the penny on top of the card remained stationary.
Responda
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Questão 69
Questão
Your binder remained stationary, being pulled down by gravity and supported by the desk.
Responda
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Questão 70
Questão
You rolled a heavy ball and a light ball with the same force to view their acceleration.
Responda
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Questão 71
Questão
You rolled two balls with with the same mass, but with different forces to view their acceleration.
Responda
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Questão 72
Questão
You dropped a ball at the same time you threw a ball to see which hit the ground first.
Responda
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Questão 73
Questão
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.
Responda
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Questão 74
Questão
The balloon-powered pinwheel spins because of action-reaction forces.
Responda
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Questão 75
Questão
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.
Responda
-
Newton's 1st Law of Motion
-
Newton's 2nd Law of Motion
-
Newton's 3rd Law of Motion
Questão 76
Questão
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?
Responda
-
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.
Questão 77
Questão
Two components of projectile motion are horizontal gravitational acceleration and vertical gravitational acceleration.
Responda
- True
- False
Questão 78
Questão
The forces that hold different atoms or ions together are
Responda
-
electric currents
-
chemical bonds
-
physical bonds
-
nuclear forces
Questão 79
Questão
An ionic bond is a bond that forms between
Responda
-
ions with opposite charges
-
atoms with neutral charges
-
one atom's nucleus and another atom's electrons
-
the electrons of two different atoms
Questão 80
Questão
In which type of bond do atoms share electrons?
Responda
-
ionic
-
covalent
-
metallic
-
polatomic
Questão 81
Questão
Is this an endothermic or exothermic reaction?
Responda
-
endothermic
-
exothermic
Questão 82
Questão
If one measured the temperature of the chemicals reacting in Figure 2, what would have happened to the temperature as the chemical reaction progressed?
Responda
-
the temperature would drop
-
the temperature would rise
-
the temperature would remain constant
-
this cannot be determined with the information provided
Questão 83
Questão
The arrangement of _______ and _________ within a substance is its chemical structure
Responda
-
atoms
-
electrons
-
protons
-
elements
-
ions
Questão 84
Questão
In ionic compounds, the positively charged ions are formed from non-metal elements
Responda
- True
- False
Questão 85
Questão
What is the name of BeF^2
Responda
-
Beryllium Flouride
-
Beryllium Floroxide
Questão 86
Questão
What is the chemical formula for Potassium Oxide is K^2O
Responda
- True
- False
Questão 87
Questão
Photosynthesis is an example of a(n) _________ chemical reaction in which plants absorb the sunlight to make glucose and oxygen
Responda
-
endothermic
-
exothermic
Questão 88
Questão
The energy need to start a chemical reaction is called
Responda
-
activation energy
-
reactancts
-
kinetic energy
Questão 89
Questão
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.
Responda
-
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.
Questão 90
Questão
What does W for J stand for?
Responda
-
Work
-
Watt
Questão 91
Questão
What does W the unit stand for?
Responda
-
Watt
-
Work
Questão 92
Questão
What conclusion(s) could draw from the level lab #1 which you completed in class
Responda
-
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
Questão 93
Questão
Machines make work less
Responda
- True
- False
Questão 94
Questão
The AMA must alway be greater than the IMA when there is NO friction
Responda
- True
- False
Questão 95
Questão
A first class lever can have an input force greater than the output force
Responda
- True
- False
Questão 96
Questão
A second-class lever always has an input force that is less than the output force.
Responda
- True
- False
Questão 97
Questão
Increasing the angle a ramp makes with the horizontal decrease the mechanical advantage
Responda
- True
- False
Questão 98
Questão
Increasing the height of a ramp increases the efficiency of a ramp
Responda
- True
- False
Questão 99
Questão
A meteorologist trying to predict global warming would consider Earth to be a closed system
Responda
- True
- False
Questão 100
Questão
A pair of tweezers is
Responda
-
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
Questão 101
Questão
What is the mechanical advantage of a ramp 2.0 m long and .50 m tall?
Responda
-
1.0
-
2.5
-
4
-
None of the above
Questão 102
Questão
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?
Responda
-
57N
-
280 N
-
285N
-
1425N
Questão 103
Questão
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.
Responda
-
.15m/s^2
-
1.7 m/s^2
-
6.6 m/s^2
-
9.8 m/s^2
Questão 104
Questão
The law of conservation of energy states that energy
Responda
-
is created from motion
-
cannot be created or destroyed
-
is always equal and opposite
-
can only be converted into heat
Questão 105
Questão
Which of the following processes requires the most work?
Responda
-
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
Questão 106
Questão
all levers have a rigid arm that turns around a point called the fulcrum
Responda
- True
- False
Questão 107
Questão
a(n) wedge is a inclined plane wrapped around a cylinder
Responda
- True
- False
Questão 108
Questão
The process that transform light into chemical energy in plants is called photosynthesis
Responda
- True
- False
Questão 109
Questão
What does I in IMA stand for?
Responda
-
Ideal
-
Inverse
Questão 110
Questão
What does the A in AMA stand for?
Responda
-
Actual
-
Adverse
Questão 111
Questão
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 __________.
Responda
-
multiplies the force, less, more
-
multiplies the distance, less, more
-
multiplies the force, more, less
-
multiplies the distance, more, less
Questão 112
Questão
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 __________.
Responda
-
multiplies the distance, less, more
-
multiplies the distance, more, less
Questão 113
Questão
If the MA is equal to one, it means that the machine _________
Responda
-
changes the direction
-
multiplies the force
-
multiplies the distance
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