The picture shows a sequence of events. Balloon 1 is tied to a string and balloon 2 is tied to a string.
Next, balloon 1 is rubbed with a wool cloth.
Then, balloon 2 is rubbed with a different wool cloth.
Balloon 2 is moved near balloon 1.
An inflated balloon plus a woolen cloth. Another inflated ballon plus a woolen cloth. An inflated baloon plus a woolen cloth. Another inflated ballon plus a woolen cloth.

Based on this sequence, what is the most likely observation?
A. Balloon 1 and balloon 2 have a negative charge, so they will pull towards each other.
B. Balloon 1 and balloon 2 have a negative charge, so they will move away from each other.
C. Balloon 1 and balloon 2 have a positive charge, so they will pull towards each other.
D. Balloon 1 and balloon 2 have an opposite charge, so they will move away from each other.

no, i was listening to water by schoolboy q while and i saw this question

explenation:

water isn't wet. wetness is a description of our experience of water; what happens to us when we come into contact with water in such a way that it impinges on our state of being. we, or our possessions, 'get wet'. a less impinging sense experience of water is that it is cold or warm, while visual experience tells us that it is green or blue or muddy or fast-flowing. we learn by experience that a sensation of wetness is associated with water: 'there must be a leak/i must have sat in something.'

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied