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Multiple Choice Question with Only One Choice Correct
An earth satellite is kept moving in orbit by the centripetal force provided by
(a) the burning of fuel in its engine
(b) the ejection of hot gases from its exhaust
(c) the gravitational attraction of the sun
(d) the gravitational attraction of the earth

Chemistry

Fill in the Blank :
In a galvanic cell, anode is ........ terminal whereas cathode is ........ terminal.

Mathematics

Multiple Answer Question
On Diwali, all the students of a class send greeting cards to one another. If the postmen deliver 1640 greeting cards to the students of this class, then the number of students in the class is