An electric bell is placed inside a transparent glass jar. the bell can be turned on and off using a switch on the outside of the jar. a vacuum is created inside the jar by sucking out the air. then the bell is rung using the switch. what will we see and hear?
a) we’ll see the bell move, but we won’t hear it ring.
b) we won’t see the bell move, but we’ll hear it ring.
c) we’ll see the bell move and hear it ring.
d) we won’t see the bell move or hear it ring.
e) we’ll see the sound waves exit the vacuum pump.

A

Explanation:

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.