physics igcse Flashcards
what is it called when the amount of unit is mistaken for another amount
a parallax error
how can we avoid parallax error
the eye should be placed so that it is directly opposite to the scale
how do we measure the volume of a small irregular solid
by putting a specific amount of water in the measuring cylinder such as 100ml, then put the solid into the measuring cylinder filled with water. Subtract the volume of the water by the volume of the solid with the water.
how do we measure the volume of a small solid that floats on water
by using a sinker, place it with a specific amount of water and record the volume. Then place the floating solid onto the sinker and measure the new volume. Subtract the original volume from the new volume
how do we measure a large object that sinks
For large objects (such as a stone) that sink, we use a displacement can and a measuring cylinder to find the volume
what instrument is used to measure time
a clock, pendulum clock, stopwatch
what units are used to measure time
hours, minutes and seconds
what is the term used for a time taken for one complete oscillation of a simple pendulum
a period
what is a scalar quantity
a physical quantity that has magnitude only
what is a vector quantity
a physical quantity that has both magnitude and direction
name some of the scalar quantities
- speed
- mass
- distance
- time
- volume
name some of the vector quantities
- velocity
- displacement
- weight
- force
- acceleration
