Answer:
Law of conservation of momentum states that "The total momentum of an isolated system always remains constant"
Or
"In an isolated system the total momentum of the interacting bodies remains constant before and after collision or interaction".
Don't be fooled ! The answer is a pair of scissor. I got it wrong because I put screw driver.
Answer:
The object will likely start moving with a nonzero acceleration.
law of conservation of mechanical energy
PE1 = Ek2
mgh=1/2mv²
h = 12 sin 60
Number of neutrons: atomic mass - atomic number
Element X's atomic mass is 79 and its atomic number is 39. Subtract 39 from 79 to find how many neutrons Element X has.
79 - 39 = 40
Element X has 40 neutrons.
