A piece of Ice was tied with a string to a water bucket‘s bottom, and the water bucket was filled with water with ice fully submerged in it. What would be the impact on the level of water when the ice melts away completely?

A. The level of water will go up
B. The level of water will go down
C. The level of water will remain unchanged
D. The level of water will first increase then come to the previous on
✅ The correct answer is option B.

A long Rail (approximately 700 meters) made up of steel is struck to produce a sound. The person standing on the other end of the rail would hear in which among the following pattern?

A. He listens the sound waves once propagated via steel
B. He listens the sound waves once propagated via air
C. He listens the sound waves twice, first propagated via steel and second propagated via air
D. He listens the sound waves twice, first propagated via air and second propagated via steel
✅ The correct answer is option C.