The great barrier reef is the largest coral reef in the world. why is this reef so important?
a. it forms a physical boundary between the islands of melanesia and australia.
b. it supports amazing biodiversity, and is home to thousands of different species.
c. it provides a unique energy source called “geothermal energy.”
d. it is home to underwater volcanoes and waterfalls

[ou.01]which of these is the most likely use of an electromagnetic wave which has wavelength shorter than microwaves but longer than visible light? o heat food safely o neat food safely o take images of bones and teeth o transmit radio and cellular phone signals o take images of bones and teeth o transmit radio and cellular phone signals o detect the location of objects which emit heat

Simple astronomical telescope the objective lens has a focal length of 75 cm and that of a piece of 5cm of the lenses are 18 cm apart when will be final image of a distant object before

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4