Oxygen has Atomic number 8 so all isotopes have 8 protons and 8 electrons.
So the number of neutrons in Oxygen-18 = 18 - 8 = 10.
Option B is the correct one.
False ..........................................................................................
Answer:
The total momentum of the system is 1.45 kg*m/s.
Explanation:
The total momentum of the system is given by:
Where:
m: is the mass
v: is the velocity
d: is for duck
b₁: is for baby duck one
b₂: is for baby duck two
b₃: is for baby duck three
Therefore, the total momentum of the system is 1.45 kg*m/s.
I hope it helps you!
Answer:
4. The reading decreases because part of your weight is applied to the table and the table exerts a matching force on you that acts in the direction opposite to your weight.
Explanation:
When you push on anything, Newtons Third Law comes into effect: "when two objects interact, they apply forces to each other of equal magnitude and opposite direction." So pretty much, the table you are putting some of your weight on is taking some of the downward force and in return the scale isn't going to push up with as much force.
I'm not the best at explaining, but im in physics right now and thats somewhat how my teacher explained it.
Answer:
Silver has least resistance
Explanation:
The given data :-
i) Since the diameter of each wire is same so the area of each wire is same i.e A₁ = A₂ = A₃.
ii) Length of each wire is same i.e L₁ = L₂ = L₃.
iii) Resistivity of copper ( ρ₁ ) = Ω.m
iv ) Resitivity of aluminum ( ρ₂ ) = Ω.m
v ) Resitivity of silver ( ρ₃ ) = Ω.m
Resistance is given by
Since the area and length are same of all three wire so it becomes constant.
R ∝ ρ
So by observing the resistivity of all three wire.
ρ₃ < ρ₁ < ρ₂
Therefore the wire silver has least resistance since it has least value of resistivity.