what is new moon?

The first of a month is the new moon day. On fifteenth of the same month, which of the following figures would represent the phase of the moon?

High spring tides occur at new moon and full moon because, the

The approximate period between two consecutive new moons is days.

The ratio of the radius of the earth to that of moon is 10 . The ratio of acceleration due to gravity on the earth and on the moon is 6 . What is the ratio (in intergral value) of the escape velocity from the earth's surface to that from the moon?

An oject has mass of 20 kg on earth .What will be its (i) mass and (ii) weight on the moon ? ("g on moon" =1.6 m//s^(2)).