Suggest a place, where one can go to study coral reefs, mangrove veggetation and estuaries.

Write any two places where methanogens can be found.

An odd of stones lie along a straight path, the distance between any two consecutive stones being 10 m. The stones are to the collected at the place where the middle stone lies. A man can carry only one stone at a time. He starts carrying the stones beginning from the extreme stone. If he covers a path of 3 km, how many stones are there ?

These questions consist of two statements each printed as Assertoin and Reason. While answering these questions, you are requied to choose any one of the following four responses. If both Assertion and Reason are true and Reason is correct explanation of Assertion If both Assertion and REason are true but Reason is not correct explanation of Assertion If Assertion is true but Reason is false If both Assertion and Reason are false Assertion: Red algae contribute in producing coral reefs. Reason: Some red algae secrete and deposite clacium carbonate over thier walls.

These questions consist of two statement each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is a correct explanation of the Assertion. B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion: Red algae contribute in producing coral reefs. Reason: Some red algae secrete and deposit calcium carbonate over their cell walls.

Motion in two dimensions, in a plane can be studied by expressing position, velocity and acceleration as vector in Cartesian co-ordinates vecA=A_(x) hati+A_(y) hatj where hati and hatj are unit vectors along x and y directions. respectively and A_(x) and A_(y) are corresponding components of vecA (shown in the figure).Motion can also be studied by expressing vector in circular polar co-ordinates as vecA=A_(r) hatr+A_(theta) hattheta where hatr = vecr/r =costheta hati+sintheta hatj and hattheta=-sintheta hati+costheta hatj are unit vectors along dirction in which 'r' and 'theta' are increasing. Show that d/dt (hatr)=omega hattheta where omega=(d theta)/(dt) and d/dt (hattheta)=-omegahatr .

Motion in two dimensions, in a plane can be studied by expressing position, velocity and acceleration as vector in Cartesian co-ordinates vecA=A_(x) hati+A_(y) hatj where hati and hatj are unit vectors along x and y directions. respectively and A_(x) and A_(y) are corresponding components of vecA (shown in the figure).Motion can also be studied by expressing vector in circular polar co-ordinates as vecA=A_(r) hatr+A_(theta) hattheta where hatr = vecr/r =costheta hati+sintheta hatj and hattheta=-sintheta hati+costheta hatj are unit vectors along dirction in which 'r' and 'theta' are increasing. Express hati and hatj in terms of hatr and hattheta .

In an experiment to estimate the size of a molecule of oleic acid 1mL of oleic acid is dissolved in 19 mL of alochol. Then 1 mL of this solution is diluted to 20 mL by adding alcohol. Now 1 drop of this diluted solution is placed on water in a shallow trough. The solution spreads over the surface of water forming one molecule thick layer. Now, lycopodium powder is sprinkled evenly over the film and its diameter is measured. Knowing the volume of the drop and area of the film we can calculate the thickness of the film which will give us the size of oleic acid molecule. Read the passage carefully and answer the following questions : What will be the volume of oleic acid in one drop of this solution?

In an experiment to estimate the size of a molecule of oleic acid 1mL of oleic acid is dissolved in 19 mL of alcohol. Then 1 mL of this solution is diluted to 20 mL by adding alcohol. Now 1 drop of this diluted solution is placed on water in a shallow trough. The solution spreads over the surface of water forming one molecule thick layer. Now, lycopodium powder is sprinkled evenly over the film and its diameter is measured. Knowing the volume of the drop and area of the film we can calculate the thickness of the film which will give us the size of oleic acid molecule. Read the passage carefully and answer the following questions : What would be the volume of oleic acid in each mL of solution prepared?

In an experiment to estimate the size of a molecule of oleic acid 1mL of oleic acid is dissolved in 19 mL of alcohol. Then 1 mL of this solution is diluted to 20 mL by adding alcohol. Now 1 drop of this diluted solution is placed on water in a shallow trough. The solution spreads over the surface of water forming one molecule thick layer. Now, lycopodium powder is sprinkled evenly over the film and its diameter is measured. Knowing the volume of the drop and area of the film we can calculate the thickness of the film which will give us the size of oleic acid molecule. Read the passage carefully and answer the following questions : How will you calculate the volume of n drops of this solution of oleic acid ?