A ship is 220 metres from a large cliff when it sounds its horn. (a)
How far has the sound travelled when the echo is heard on the ship?
(b)
The ship changes its distance from the cliff. When the echo time is 0.5
seconds, how far is the ship from the cliff? (take speed of sound as 340m/s)​

Ais a survey that focuses on only a small portion of the population, and the results are generalized for the larger population.

Based on this map, which statement about africa’s economic activity is most accurate? a) coastal countries are all members of opec b) economic development is more common with opec nations c) coastal countries have more access to productive resources d) economic development is more common above the sahara desert

These factors threaten north americas ecosystems