Read the following hypothesis about why a chicken bone becomes bendy after being soaked in vinegar:

the bone can bend because the acid in the vinegar has removed the calcium that made it hard.
what prediction could be made based on this hypothesis?

a.
an acidic substance like many drinks wouldn't make bones bendy.

b.
acids are very powerful substances and should be handled with care.

c.
other kinds of bones containing calcium wouldn't get bendy in the vinegar.

d.
if the acid was separated from the vinegar, chicken bones wouldn't become bendy in the remaining vinegar.

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas

the design of a ski jumping suit involves a trade-off between giving the skiers lift to get higher jumps and ensuring the skier does not face a lot of drag before the jump itself. an expansive suit may to lift the skier higher, but at the same time, it will also increase the air resistance. higher air resistance as the skier goes down the slope limits the speed of the jump. a big suit also increases the risk of losing balance or control, especially if there's a strong gust of wind. while technologically enhanced suits a lot, clothing is not the only factor in a ski jumper’s success. gathering speed while skiing down the slope, ensuring good speed on the ramp, and maintaining good body posture and form in the air all contribute to a ski jumper's success.

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation: