Measurements and Quantities Flashcards
How do you find the total uncertainty in a quantity found by multiplying two measurements together?
Add the percentage uncertainties in the base measurements.
How do you find the total uncertainty in a quantity found by dividing two measurements?
Add the percentage uncertainties in the base measurements.
How do you find the total uncertainty in a quantity found by adding two measurements together?
Add the absolute uncertainties in the base measurements.
How do you find the total uncertainty in a quantity found by subtracting two measurements?
Add the absolute uncertainties in the base measurements.
How can accurate measurements of the temperature θ of a water bath be made?
Use a thermometer (with ± 1 degree C )
Stir water bath / avoid parallax (for glass thermometer)
What is a vector quantity?
A quantity that has both magnitude and
direction.
Why does measuring across a higher maximum order increase accuracy?
The uncertainty in the measurement of angle is the same for all angles and the bigger the angle measured the smaller the % error
What is a scalar quantity?
A quantity with a magnitude only.
What is velocity?
The rate of change of displacement.
What is displacement?
The distance travelled in a certain direction.
What is instantaneous speed?
The speed at any particular instant in time.
What is average speed?
The overall distance divided by the time taken.
What is acceleration?
The rate of change of velocity.
