One astronut speaks with another astronaut on Moon. Can the other astronaut listen to the first astronaut?

Name India's first astronaut.

Can an astronaut listen to the sound produced by another astronaut on the surface of moon?

Why does the sky appears dark instead of blue to an astronaut?

Why one can jump higher on the surface of moon than on the earth?

Calculate the weight of an astronaut whose mass is 80 kg on the surface of earth and on the surface of moon. Given that the acceleration due to gravity at moon is one-sixth of that of earth.

In a purse there are 10 coins, all shillings except one, which is a sovereign in another purse, there are 10 coins, all shilings. Nine coins are taken from the former purse and put into the latter, and then nine coins are taken from the latter and put into the former. find the chance that the sovereign is still in the first purse.

Each plant or group of plants has some phylogenetic significance in relation to evolution. Cycas, one of the few living members of gymonsperms is called as the 'relic of past'. Can you establish a phylogenetic relationship of Cycas with any other group of plants that justifies the above statement?