Explanation:
According to law of conservation of energy, energy can neither be created nor it can be destroyed. It can only be transformed from one form to another.
Therefore, when pendulum is at highest point of its swing then it had only potential energy and zero kinetic energy. But when swing reaches at the bottom then potential energy converts into kinetic energy as height is zero.
Hence, potential energy = kinetic energy.
Thus, we can conclude that kinetic energy at the bottom of swing of pendulum is 359 J.
A solid.
As you slowly go from the solid state to the gas, the molecules within spread farther and farther away.
Answer:
b. 2-4
Explanation:
Look at the slope of the line, between 0-2 and 4-6 the slope is only 10, but between 2-4 the slope is 20, so that's when the temperature is changing the fastest. In the same time it took for the water to increase by 20 degrees between 0-2 and 4-6, the temperature of the water increased by 40 degrees between 2-4 so that's when the change is the fastest.
The balanced chemical reaction would be
<span>fecl2 + 2naoh = fe(oh)2(s) + 2nacl
Initial amounts of the reactants are given, so, we need to determine which of the reactants is the limiting reactant and use this amount to determine what is asked. However, what is being asked is how many of the FeCl2 is used in the reaction, showing that it is NaOH that is the limiting reactants. Thus, we just use the initial amount of NaOH and relate the substances by the chemical reaction as follows:
6 mol NaOH ( 1 mol FeCl2 / 2 mol NaOH ) = 3 mol FeCl2
Therefore, 3 moles of FeCl2 is used up and 3 moles of FeCl2 is also left after the reaction.</span>