The back saver sit and reach from the fitnessgram measure this fitness component.

question 25 options:

a)
cardiovascular fitness

b)
aerobic capacity

c)
muscular endurance

d)
flexibility

0.55x745.7j and a calculator

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

answerdmitry mendeleyev made a workable classification of the elements