Explanation:
Activation energy and reaction rate
The activation energy of a chemical reaction is closely related to its rate. Specifically, the higher the activation energy, the slower the chemical reaction will be. ... The released energy helps other fuel molecules get over the energy barrier as well, leading to a chain reaction.
B identifying the types of data to be gathered
Answer;
- This statement about matter and its behavior is best classified as a Law.
-It is the Law of Universal Gravitation.
Explanation;
-The Law of Universal Gravitation states that every point mass attracts every other point mass in the universe by a force pointing in a straight line between the centers-of-mass of both points, and this force is proportional to the masses of the objects and inversely proportional to their separation.This attractive force always points inward, from one point to the other.
-The Law applies to all objects with masses, big or small. Two big objects can be considered as point-like masses, if the distance between them is very large compared to their sizes or if they are spherically symmetric.
The average weight of an athlete should be around 60kg so from the information that the athlete can run 100m in 10s, we can calculate that their average speed is 10m/s. Using the kinetic energy formula, Ek = 1/2mv^2 we can calculate the kinetic energy using 60kg as the mass.
(1/2)(60)(10^2) = Ek
Ek= 3000J
Answer:
21.5 m
Explanation:
A car has an initial speed of 31.4 km/hr
Convert to m/s
= 31.4 × 1000/3600
= 31,400/3600
= 8.722 m/s
Acceleration = 1.2 m/s^2
Time= 1.3 seconds.
Therefore the displacement can be calculated as follows
S= 8.722 × 1.3 + 1/2 × 1.2 × 1.3^2
= 11.34 + 1/2 × 20.28
= 11.34 + 10.14
= 21.5 m
