Electrons are negatively charged so an excess will produce a negative charge.
Answer:
Option A. 11
Explanation:
The atomic number of an element does not change.
Recall:
Atomic number = proton number
If the atom is neutral, then,
Proton number = electron number
Since the element is sodium, then, the atomic number of sodium–25 is 11.
Also, we were told to obtain the electrons of a neutral atom of sodium–25
Therefore,
Atomic number = proton number = 11
Since the atom is neutral,
Proton number = electron number = 11
Answer:
The correct option is;
d) F, because the net force is equal to the mutual contact force between the blocks
Explanation:
The given information are
The mass of block A = m
The velocity of block A = +v
The mass of block B = 2·m
The velocity of block B = -v
Given that the two blocks collide, we have;
Initial total momentum = m × v + 2·m×(-v) = m·(v - 2·v) = -m·v
Final total momentum = m × v₁ + 2·m×v₂ = m·(v₁ + 2·v₂)
From the law of conservation of linear momentum, we have;
m·(v₁ + 2·v₂) = -m·v
v₁ + 2·v₂ = -v
Therefore, the resultant velocity of the two blocks is -v, and the direction of the block A is reversed and the resultant inertia is equivalent to the inertia of block A
Therefore;
The force exerted on block B = The force exerted on block A = The rate of change of momentum experienced by the two blocks = The mutual contact force experienced between the blocks.
Answer:
The car is going 0 km/h more than the bike
Explanation:
