Define
(a) solar day
(b) Mean solar day.

1 mean solar day = ?

1 mean solar day=____

A solar water heater cannot be used to get hot water on : (a) a sunny day (b) a cloudy day ( c) a hot day (d) a windy day.

A solar cell

The difference in the lengths of a mean solar day and a sidereal day is about

Sketch two ways in which solar cells can be connected. Also draw the diagrams to show the arrangement of solar cells to form solar panel and solar array.

One of the satellite of jupiter, has an orbital period of 1.769 days and the radius of the orbit is 4.22 xx 10^(8) m . Show that mass of jupiter is about one thousandth times that of the radius of the sun. (Take 1 year = 365.15 mean solar day).

One second is ((1)/(k)) th part of a mean solar day, where k = __________.

Statement I : Sideral day is shorter than Solar day . Statement II : The motion of the Earth in its orbit around the Sun is termed as revolution .