state the two layris of chemical combination
Answers
Answer:
Given
A car starting from rest and moving with uniform acceleration attains a speed of 60 km/h in 20 minutes
To Find
Acceleration (km/h²)
Solution
We know that
Equation of motion
\sf \longrightarrow v=u+at⟶v=u+at
Here
u = Initial velocity
v = Final velocity
a = Acceleration
t = Time
According to the question
We are asked to find acceleration
Hence
We must find "a"
Therefore
\sf \longrightarrow a=\dfrac{v-u}{t}⟶a=
t
v−u
Given that
A car starting from rest and moving with uniform acceleration attains a speed of 60 km/h in 20 minutes
Hence
u = 0 [starts from rest]
v = 60 km/h
t = 20 min = 0.333 hour
Substituting the values
We get
\sf \longrightarrow a=\dfrac{60-0}{0.333} \ km/h^{2}⟶a=
0.333
60−0
km/h
2
\sf \longrightarrow a=\dfrac{60}{0.333} \ km/h^{2}⟶a=
0.333
60
km/h
2
\sf \longrightarrow a=180.18 \ km/h^{2}⟶a=180.18 km/h
2
Therefore
\sf \longrightarrow a \approx 180 \ km/h^{2}⟶a≈180 km/h
2
Hence
Acceleration = 180 km/h²
Explanation:
The law of the conservation of mass, in which mass before reaction has to equal mass after reaction. The law of constant proportions, in which the ratio mass for the same compound is constant. The law of multiple proportions, in which multiple elements can combine with each other in multiple ratios; and finally.