To solve this problem we will apply Coulomb's law. For which it tells us that if the charges are constant, the relationship between two forces is equivalent to the inverse of its squared distance. Mathematically this expression can be derived from the Coulomb equation for force:
Here,
k = Coulomb's constant
q = Charge
r = Distance
Under the considerations of the statement we have to
Now replacing,
Answer:
15 protons and 18 electrons
General Formulas and Concepts:
<u>Chemistry</u>
- Reading a Periodic Table
- Element Number
- Neutral Atoms
- Ions
Explanation:
We are given the element P. P is 15 on the Periodic Table, meaning it has 15 protons and 15 electrons (all elements are in neutral form).
P³⁻ ion means the element now has a negative charge of 3. We know protons have a positive charge and electrons have a negative charge. 3- means we will have more electrons than protons.
Therefore, P³⁻ would have 15 protons and <em>18</em> electrons:
15 (+) + 18 (-) = 3 (-)
Answer:
Magnetic field at the mid point of coil is 6.74 x 10⁻³ T
Explanation:
Given :
Current flowing through the solenoid, I = 3.50 A
Length of the solenoid, L = 30 cm = 0.3 m
Number of turns in the solenoid, N = 460
Magnetic field inside the coil at its mid point is given by the relation:
B = μ₀nI ...(1)
So, equation (1) becomes:
Substitute the suitable values in the above equation.
B = 6.74 x 10⁻³ T
Answer:
v_f = 1.14 m / s
Explanation:
This is an exercise of conservation of momentum, let's define a system formed by the skater and the snowball, therefore the forces during the launch are internal and the moment is conserved.
Initial instant. Before throwing the ball
p₀ = M v₀
Final moment. After throwing the snowball
p_f = (M-m) v_f + m v
the moment is preserved
p₀ = p_f
M v₀ = (M-m) v_f + m v
v_f =
let's calculate
v_f =
v_f = 64.936 / 56.89
v_f = 1.14 m / s