The energy required to start a reaction IS called the activation energy. TRUE
Answer:
(1) weight = 565N
distance = 325m
time= 12.6s
power = work done/time
work done= force * distance
= 565*3.25 =1836.25
:. power = 1836.25\12.6
=145.7!
(2) the books will add more to her weight and thereby increasing her power output.
Answer:
C. Surface area
Explanation:
The rate of chemical reaction depends on various factors such as:
- concentration and pressure
- nature of reactants
- temperature
- surface area
- presence of catalyst, etc.
Effect of surface area of reactants: the rate of a chemical reaction can be increased by increasing the the area of contact of the reacting substances. This is especially important when one or more of the reactants are solids., because only the particles of the solid that are exposed are able to take part in the reaction at each instant of time. Therefore, the greater the surface area of the solid reactant particles the faster the reaction.
The surface area of solid reactants can be increased by grinding or pelletizing, thus allowing for a greater contact between the reacting particles,
The instance in which one of the solid reactants was treated in a coffee grinder before adding to the reaction container is one way of increasing the surface area of a reactant.
Answer:
i belive 1 m/s
Explanation:
dividing displacement from time it should be 1 cuz 5/5 is 1
please tell me if right!
