You cast some metal of density p_m in a mold, but you are worried that there might be cavities within the casting. you measure the weight of the casting to be w, and the buoyant force when it is completely surrounded by water to be b. show that v_0=b/(p_water g) – w/(p_m g) is the total volume of any enclosed cavities. if your metal is copper, the casting's weight is 158 n, and the buoyant force is 22 n, what is the total volume of any enclosed cavities in your casting? express your answer using two significant figures. what fraction is this of the total volume of the casting? express your answer using two significant figures.

b. a lightning bug, plug of grass, and a worm

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015

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.