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Physics > Length And Time > Flashcards

Length And Time Flashcards

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1
Q

What is the SI unit of mass?

A

Kg
Kilogram

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2
Q

What is the SI unit of time ?

A

Seconds

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3
Q

The unit tonne is used to measure what?

A

-Cars
-Boats
Etc

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4
Q

The unit kilogram is used to measure what?

A

-Apples
-Oranges

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5
Q

The unit gram is used to measure what?

A

-Spices
-Pepper
Etc

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6
Q

The unit milligram is used to measure what?

A

-Medicine
-Panadol

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7
Q

What does the unit microseconds measure?

A

light speed

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8
Q

What does the unit nanosecond measure?

A

Time for chemical reactions

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9
Q

What is the unit kilometer used to measure?

A

Distance form two places or buildings

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10
Q

What is the unit meter used to measure?

A

The length of a room

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11
Q

What is the unit centimeter used to measure?

A

The length of a textbook or notebook.

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12
Q

What is the unit millimeter used to measure?

A

Thickness of iPhone

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13
Q

What is the unit micrometer used to measure?

A

The length of a bacteria or virus

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14
Q

What is the unit nanometer used to measure?

A

The length of a nucleus inside a cell.

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15
Q

What are the items used to measure length?

A

Ruler
Tape measure
Calipers
Vernier calipers

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16
Q

What equipment are used to measure time?

A

Stopwatch
Stop clock
Pendulum

17
Q

What is the difference between stopwatch and stop clock

A

Stop clock is more sensitive than stopwatches. So stop watches measure time more efficiently. Stop watch can measure less than seconds while stop clocks cannot

18
Q

How to calculate an accurate value for one complete swing of the pendulum.

A

1) Start the watch once the pendulum is released
2) Let it complete 25 full swings
3)Stop the watch once the watch reaches the starting point after completing 25 full swings.
4)Divide the total time for the pendulum to come plate 25 full swings by 25, the number of swings.

19
Q

What equipment is used to measure volume?

A

Measuring cylinder

20
Q

What is the formula of weight?

A

Weight (N) = mass (kg) x gravity force

Physics (8 decks)

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