It has been shown that certain shapes of metal beams are stronger than other shapes. for example, i-beams are stronger than rectangular solids of the same size. designers must often take into account the strength requirements for an application and weigh these requirements against cost and availability.

what kind of test would a designer perform to get the strongest material for his application?

Sydney drew a flow chart to illustrate the nitrogen cycle.which labels best complete the flow chart? x: producers undergo photosynthesis.y: nitrogen compounds are released into the air.x: nitrogen compounds are released into the air.y: producers undergo photosynthesis.x: free nitrogen is in the atmosphere.y: producers absorb nitrogen compounds through their roots.x: producers absorb nitrogen compounds through their roots.y: free nitrogen is in the atmosphere.

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point