I believe a vector needs to be set. but no 100% sure!
I hope this helps!
I think C i’m so sorry if i’m wrong tho.
1. 100,000% A. I simply googled C12 and it's the most stable Isotope of Carbon...
2. A as well.. 99% sure.. and so far my 99% sure has been 100% correct so ... :p
The most effective way to prevent beach erosion is to replant mangrove trees, seaweeds and seagrass. The strategic planting of vegetation can be used to help control erosion. The roots of these plants help to anchor the sand and ensure that it is not carried off in erosion. This is why many areas plant seagrass and build marshes along coasts to prevent erosion.
Answer:
Relation between kinetic energy of truck and kinetic energy of car is given as

Explanation:
As we know that mass of truck is four times the mass of car

and the speed of truck is double that of speed of car

now we have kinetic energy of the truck is given as

similarly kinetic energy of car is given as

now from above two equations we have


so we have
