Measuring the diameter of a circle using a ruler requires the knowledge of what the diameter of a circle is.
The diameter of a circle is simply the radius of the circle multiplied by 2. In other words, one can simply measure the radius of a circle and multiply it by 2 in order to get the diameter of the circle.
The radius of a circle in itself is the distance between the center of the circle and to any endpoint of the circle.
Hence, in order to measure the diameter of the circles in question, just measure the radius of each circle using a ruler, multiply it by 2 and record your measurements.
If you had used the cm reading on the ruler to record your measurements, each diameter in cm can be converted to mm as follows:
1 cm = 10 mm
Assuming that a particular diameter reads 10 cm:
10 cm = 10 x 10 mm
= 100 mm.
In other words, just multiply your measurement by 10 in order to convert them to mm.
More on measurement and conversion can be found here: brainly.com/question/13710038
We have that "J.J. Thomson proposes a new model of the atom" statement refers to the Plum Pudding model by the scientist J.J. Thomson.
From the question we are told
Thomson proposes a new model of the atom?
Generally
- J.J. Thomson was a scientist that dedicated his lives work to studding atoms and its particles
- J.J. Thomson is most famous for his evolutionary work with the cathode ray tube
- The Cathode ray tube gave rise to the discovery of the electrons at that time was called little negatively charged particles within the atom
- This caused J J Thompson to propose a law which stated that atoms where particles which were made up of negative charge around Positive charges
- This was called Plum Pudding
Therefore
"J.J. Thomson proposes a new model of the atom" statement refers to the
Plum Pudding model by the scientist J.J. Thomson.
For more information on this visit
brainly.com/question/1641336
Mouth- moistening the mechanical digestion of food
Liver- aiding in chemical digestion of fats
Small intestine- chemical digestion and absorption of nutrients
Stomach- mechanical and chemical digestion of food with acids and enzymes
Large intention- absorption of water and compaction of indigestible material for elimination
Pancreas- secreting the enzymes lipase, trypsin and amylase.
