hold
take care of the data types of variables declared and format specifiers
1 st.
Gunpowder
1
how did you incresed the accuacy of your catapult
You train and practice.
Measurement
your wiener
Calibrate
By practice with an instructor if possible.
keep fightinng it will go up
You raise your dexterity.
You adjust the measuring instrument :)
bed the rear stock
You improve your model through a better understanding of the underlying processes. Although more trials will improve the accuracy of experimental probability they will make no difference to the theoretical probability.
Well, one way you can improve your accuracy is taking private lessons with professional soccer players or someone you know that plays. There are many other ways but that is a good one.