Give the estimated amount of garbage collected in Chennai per day?

Name the garbage disposal sites in Chennai.

Equal masses of two samples of charcoal A and B are burnt separately and the resulting carbon dioxide are collected in two vessels. The radioactivity of ^14 C is measured for both the gas samples. The gas from the charcoal A gives 2100 counts per week and the gas from the charcoal B gives 1400 counts per week. Find the age difference between the two samples. Half-life of ^14 C = 5730 y .

True or False.if False,give the correct statement: Direct collection and use of rain water is called rain water harvesting.

Following table shows frequency distribution of no. of rooms occupied in a hotal per day . Find the median no. of rooms occupied in a hotal per day .

Below is given the frequency distribution of no. of packages received at a post office per day. Find the median no. of packages received by the post -office per day.

A radioactive sample contains 10^(-3) kg each of two species A and B with half-life 4 days and 8 days respectively. The ratio of the amounts of A and B after a periof of 16 days is

Give notes on collection of oyster.

The amount of biodergradable organic matter in sewage water can be estimated by measuring

Give the principle involved in the estimation of halogen in an organic compound by Carius method.