1). The little projectile is affected by friction all the way through the block.
Friction robs some kinetic energy.
2). The block is affected by friction as it scrapes along the top of the post.
Friction robs some kinetic energy.
3). The block is also affected by friction with the air (air resistance) as it
falls to the ground. Friction robs some kinetic energy.
Answer:
Option B
Nitrogen
Explanation:
The atmosphere contains various gases and nitrogen occupies 78% followed by oxygen which takes approximately 21%, argon takes 1%, carbon dioxide about 0.03%. Therefore, the gas present in the largest quantity is nitrogen.
Answer:
like fixing are car engine would be an example of a mechanical wave
