<u>Answer:</u> When elements combine in a compound, the ratio of their masses is always the same
<u>Explanation:</u>
Dalton's theory is based on mainly two laws:
Law of conservation of mass states that mass can neither be created nor be destroyed, but it can transformed from one form to another form.
Law of constant composition states that a compound always contain the elements in the fixed ratio by their masses.
<u>For Example:</u> In water , the hydrogen and oxygen are present in the fixed ratio of 1 : 9 by their mass.
Hence, when elements combine in a compound, the ratio of their masses is always the same
Answer:
V = 90.51 m/s
Explanation:
From the given information:
Initial speed (u) = 0
Distance (S) = 391 m
Acceleration (a) = 18.9 m/s²
Using the relation for the equation of motion:
v² - u² = 2as
v² - 0² = 2as
v² = 2as
v = 121.57 m/s
After the parachute opens:
The initial velocity = 121.57 m/ss
Distance S' = 332 m
Acceleration = -9.92 m/s²
How fast is the racer can be determined by using the relation:
V = 90.51 m/s