1) If a nucleus were as big as a grape, an atom would be as big as a :

a house

a football field

a city

the moon

Question

1) If a nucleus were as big as a grape, an atom would be as big as a :

a house

a football field

a city

the moon

anonymous · Answer

A body of mass 98Kg is moving in a vertical circle of radius 1m.The minimum possible speed at the highest point of the circle is: 

1m/s 

4m/s 

10m/s 

6m/s

anonymous · Answer

An atom would be a football field

anonymous · Answer

$$a=v^2/r$$and the acceleration according to what I understood from you is g and at the highest point it has the cos of 90 degrees so it would be one, 
so 10=v^2/1
then v would equal Sqrt[10] m/sec

anonymous · Answer

Football field.  This is a common question.