Measurement📏⚖️ and length Flashcards

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1
Q

Why does science have the ability to make predictions?

A

It only deals with physical quantities

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2
Q

What is a parallax error?

A

When you do not have proper eye measurement

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3
Q

How to prevent parallax error

A

Using set squares, eye level, positions in line and perpendicular to point

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4
Q

WHats the smallest measurememnt Vernier Caliper makes

A

can measure up to 2 decimal places in a cm (0.1mm)

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5
Q

What is zero error

A

length of objext different from end point when you don’t start at 0 mark

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6
Q

Whats the smallest measurement Micrometer screw gauge measures

A

makes use of main and thimble scale to improve precision 0.01mm

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7
Q

What do we use to measure time?

A

stopwatches

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8
Q

What is a linear scales

A

Division of the units are equally spaced

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9
Q

What is a non-linear scale

A

Divisions of the units are not equally spaced

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10
Q

What is a digital scale

A

Changes byi a fixed minimum amount and can be read off directly from display

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11
Q

What is a analogue scale

A

estimated from an indicator that moves over a scale

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12
Q

What’s important when recording a measurement?

A

uncertainties can occur due to limitations of instruments/methods so it is important to measure the uncertainty as well

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13
Q

What is accuracy?

A

the closeness of a measurement of a physical quantity to the true value

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14
Q

What is precision

A

closeness of several measurements. Repeated measurements are close precise

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