Apendulum has 894 j of potential energy at the highest point of its swing. how much kinetic energy will it have at the bottom of its swing?

Energy is conserved.  You can't create it and you can't destroy it.  If there's nothing going on here that robs energy from the pendulum**, then it must have the same amount of energy at every point in its swing as it has at every other point.

If it has 894 J of energy at the highest point ... where its energy is all gravitational potential energy, then it must have the same 894 J of energy at the lowest point, where its energy is all kinetic energy.

** Examples of things that could be going on that would rob energy from the pendulum:  

-- air resistance

-- a fly lands on it while it's swinging

--  somebody breathes on it

-- it bumps into something

-- friction at the top pivot

-- etc.

There's ALWAYS something.  If it isn't one thing, then it's something else.  That's why pendulums always stop eventually.

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.