When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases.
This graph shows a straight line.
Answer:
7.2 meters per hour
Explanation:
It is given that,
The speed of a paramecium is 2,000 micrometers per second.
We need to find the speed of the paramecium in meters per hour.
We know that,
and
1 hour = 3600 seconds
Hence, the speed of the paramecium is 7.2 meters per hour.
Five points of Dalton's atomic theory:
1) all elements are made up of atoms.
<span>2) atoms are so small that they cannot be divided any further. </span>
<span>3) an atom can neither be destroyed nor be formed. </span>
<span>4) atoms of an element are similar, they posses same mass and same properties. </span>
<span>5) atoms of different elements combine in a definite ratio to form compounds. </span>
<span>
</span><span>Due to further experimentation it was concluded that atom is made up of small particles identified as proton, neutrons, and electrons. They can be further subdivided.
Another change is the presence of isotopes of atoms of different elements. Hence, atoms of the same element can also have different masses. </span>