Questão 1
Questão
What is accuracy?
Responda
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How close the measurement is to the accepted value
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The degree to which you measure
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The skill of the experimenter
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The level of uncertainty
Questão 2
Questão
The smallest scale increment on a measuring device is the...
Responda
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Precision
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Accuracy
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Reliablity
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Uncertainty
Questão 3
Questão
What does the level of uncertainty depend on?
Responda
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Accuracy
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Precision
-
Number of repeats
Questão 4
Questão
All experiments are uncertain
Questão 5
Questão
Which of these are systematic errors?
Questão 6
Questão
Which of the following does not apply to random errors?
Questão 7
Questão
Systematic errors can be totally eliminated
Questão 8
Questão
When adding or subtracting measured quantities, how do we find the uncertainty?
Responda
-
Add the absolute uncertainty of each
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Add the percentage uncertainty of each
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Multiply the percentage uncertainties together
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Use the biggest absolute uncertainty
Questão 9
Questão
When multiplying or dividing quantities, how do we find the uncertainty?
Responda
-
Add the percentage uncertainty
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Multiply the percentage uncertainties
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Add the absolute uncertainties
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Double the uncertainty
Questão 10
Questão
What is a scalar quantity?
Questão 11
Questão
Which of these are scalar quantities?
Responda
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Distance
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Speed
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Velocity
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Current
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Acceleration
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Mass
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Density
Questão 12
Questão
How do you combine scalar quantities?
Responda
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Add them
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Multiply them
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Resolve them
Questão 13
Questão
Momentum is a vector
Questão 14
Questão
Force is a scalar
Questão 15
Questão
How do you combine parallel vectors?
Questão 16
Questão
How do you combine vectors that are at random angles relative to each other?
Questão 17
Questão 18
Questão 19
Questão
What is the pulling force exerted by a string, chain, cable or similar object?
Responda
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Tension
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Normal reaction force
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Weight
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Upthrust
Questão 20
Responda
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A force resisting the parallel movement of two surfaces in contact
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A force that slows down objects
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A force which prevents objects from sliding
Questão 21
Questão
Which of these are fundamental forces?
Responda
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Strong Nuclear
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Weak Nuclear
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Gravitational
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Electromagnetic
Questão 22
Questão
In which direction does weight act?
Questão 23
Questão
In which direction does the normal reaction force act?
Questão 24
Questão
If an object is in equilibrium it is static
Questão 25
Questão
What does equilibrium mean?
Responda
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There are no forces acting on a body
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There is no resultant force
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A body is completely still
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A body is balanced
Questão 26
Questão
What is a moment?
Responda
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The turning effect of a single force
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force x distance
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force x perpendicular distance
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weight x distance
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force/distance
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A pair of forces that are equal and opposite
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The forces on an object
Questão 27
Questão
What is the principle of moments?
Responda
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The sum of the clockwise moments of an object = the sum of the anticlockwise moments of an object
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If an object is in equilibrium: the sum of clockwise moments = the sum of anticlockwise moments
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The sum of anticlockwise moments on an object can never fully equal the sum of clockwise moments on an object
Questão 28
Questão
A couple of forces is two forces that are equal and opposite and acting in the same line
Questão 29
Questão 30
Questão
What is pressure measured in?
Questão 31
Questão
Pressure = perpendicular force/area
Questão 32
Questão
Pressure = density x height x gravity