Category: TUTORIALS
Some examples of THERMO Spoken Here! are worked with great thoroughness and many words of explanation.
Our company has contracted to protect an off-shore oil rig situated in the Davis Strait. A massive slab of ice (approximately 800 mega grams)
has cleaved from the ice-shelf and is drifting with the sea current directly toward the rig.
The map (right) shows the initial location of the the slab relative to the the production rig. We plan that our largest tug, (pulling constantly at 90° to the current), will drag the slab off-course such that it will pass, abreast of the oil rig, at a distance no closer than 4000 meters.
Calculate the towing force the tug must sustain to accomplish the task.
The events of a bicycle race are explained simplistically as "the cyclist expends physical (metabolic) energy to move himself/herself and the cycle along a road and through the surrounding air. In places the road is flat, further along there are hills that must be climbed. Descents from hilltops are the easiest events of a cyclist's race.
Racers describe their racing as having three types: time trial, climbing, and downhill. In this example we compare the three phases at those times, at instances for which speed of the cyclist/cycle system is constant.
Springfield Rifle Muskets (1861)
Lead bullets recovered from Civil War battlefields exhibit severe fragmentation and distortion from their original shapes. Many of these were fired by Springfield rifle muskets. A possible explanation is that impacts of the lead bullets caused them to melt partially, smear, then freeze back to solid in a contorted form.
Is it possible that the lead bullets become liquid upon impact?