You swing one yo-yo around your head in a horizontal circle. then you swing another yo-yo with twice the mass of the first one, but you don't change the length of the string or the period. how do the tensions in the strings differ?

Explanation:

You swing one yo-yo around your head in a horizontal circle. The tension acting in the string is equal to the centripetal force. Its formula is given by :

r is the radius of circular path or the length of the string. It remains constant. If the mass of the yo- yo swing is double such that, m' = 2m

New centripetal force is equal to,

So, the new tension in the strings gets doubled.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.