(a) distance measured with metre rule or tape rule
time measured with stopwatch/ stop clock/ timer
Average speed = total distance / time
(b) (i) decrease in speed
(ii) Change in speed = a * t
4.5 m/s
<em>hope this helps......</em>
The formula CaO₂H₂ correctly gives the relative number of each type of atom in the compound.
But the OH group usually behaves as a unit. It doesn't fall apart.
So chemists have agreed to write the OH group as a unit: Ca(OH)₂.
This shows that there are 1 Ca atom and 2 OH groups in a formula unit of calcium hydroxide.
Hey there !
The answer is C. build up of electrical charges by friction
Static electricity is a stationary electric charge, typically produced by friction, which causes sparks or crackling or the attraction of dust or hair.
Hope this helps !
The new volume of air trapper in the cylinder is determined as 116.56 mL.
<h3>
New volume of air in the cylinder</h3>
The volume of air trapper in the cylinder is determined from Boyle's law;
P₁V₁ = P₂V₂
where;
- P₁ is initial pressure = 1.08 atm
- V₁ is initial volume = 145.7 mL
- P₂ is new pressure = 1.25 x 1.08 atm = 1.35 atm
- V₂ is new volume = ?
V₂ = (P₁V₁)/P₂
V₂ = (1.08 x 145.7)/1.35
V₂ = 116.56 mL
Thus, the new volume of air trapper in the cylinder is determined as 116.56 mL.
Learn more about volume here: brainly.com/question/1972490
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