Static muscle contractions (mark all that apply) produce a lengthening of the muscle while exerting force
do not change their length
O position of joints and muscles do not change
are isometric

Q=mc∆tq=59.047g×4.2j/g/k×(27.8-23.7)q=1,016.789j

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases. 

Making sure the equipment is cleaned daily and insuring proper hygiene is kept up with the working staff.