True/ False: Impression of an image lasts on the retina for `frac(1)(10)th` the of a second

True or False. Improper solid waste management was one of the main reasons behind the serious flood calamity in Mumbai on 26th July 2005.

Read the statements given below. Identify and write the concept upon which the given statement is based. Identify and write the name of phenomenon that allows the image formed on retina to remain imprinted there for (1^(th))/(16) of a second after the object is removed from the front of the eyes.

Somehow, an ant is stuck to the rim of a bicycle wheel of diameter 1m . While the bicycle is on a central stand. The wheel is set into rotation and attains the frequency of 2 frac(rev)(s) in 10 seconds, with uniform angular acceleration. Calculate number of revolutions completed by the ant in these 10 seconds.

The mass and weight of an object on Earth is 5 kg and 49 N respectively.What will be their values on the Moon? Assume that the acceleration due to gravity on the Moon is frac(1)(6) th of that on the Earth

The value of rate constant for a first order reaction is 2.303 xx10^(-2) sec^(-1) . What will be time required to reduce the concentration to (1)/(10) th of its initial concentration ?

State whether the following statements are true or false. Correct the false statements. Nerve impulses are slow and long lasting whereas action of hormones is fast and short lived.

State whether the following statements are true or false. Correct the false statements: If the image is erect, the height of the image is negative.

Say True or False: The World Biodiversity Day is on 28th February.