Answer:
v = 2 m/s
Explanation:
The object moves 20 m in 10 s initially. Then it remains at rest for 20 s. It is required to find the average speed of the object.
Fro 10 s it covers 20 m. For that time, speed is :
For 20 s, it was at rest means distance covered is 0. So, speed is 0.
The average speed of the object is equal to the sum of speed for 10 s and for 20 s i.e.
v = 2 m/s + 0 = 2 m/s
So, the average speed of the object is 2 m/s.
You can deal with this question using the collision theory, which states that the chemical reactions occur when particles collide with enough energy to reach the Activation Energy.
The velocity of the particles is related with the temperature. At higher temperatures, higher velocities and higher frequency of collisions.
Also, at higher concentration (more particles is a same volume) the number of collisions will increase.
Then, hIgher concentration and higher temperature will increase the frequency of the molecular collisions..
Then, the answer is the proposal #1: "<span>increasing the frequency of molecular collisions"</span>
Answer:
It is because they are physical quantities
Explanation:
I think so..
