Length And Time Flashcards
What is the SI unit of mass?
Kg
Kilogram
What is the SI unit of time ?
Seconds
The unit tonne is used to measure what?
-Cars
-Boats
Etc
The unit kilogram is used to measure what?
-Apples
-Oranges
The unit gram is used to measure what?
-Spices
-Pepper
Etc
The unit milligram is used to measure what?
-Medicine
-Panadol
What does the unit microseconds measure?
light speed
What does the unit nanosecond measure?
Time for chemical reactions
What is the unit kilometer used to measure?
Distance form two places or buildings
What is the unit meter used to measure?
The length of a room
What is the unit centimeter used to measure?
The length of a textbook or notebook.
What is the unit millimeter used to measure?
Thickness of iPhone
What is the unit micrometer used to measure?
The length of a bacteria or virus
What is the unit nanometer used to measure?
The length of a nucleus inside a cell.
What are the items used to measure length?
Ruler
Tape measure
Calipers
Vernier calipers
What equipment are used to measure time?
Stopwatch
Stop clock
Pendulum
What is the difference between stopwatch and stop clock
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
How to calculate an accurate value for one complete swing of the pendulum.
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.
What equipment is used to measure volume?
Measuring cylinder
What is the formula of weight?
Weight (N) = mass (kg) x gravity force
