The atomic number is the number of protons of the atom.
So, just count the number of red spheres (protons) and that is the atomic number of the atom.
The protons are in the nucleus of the atom. Every single element is formed by a representative number of protons (atomic number).
For example, every hydrogen atom has one proton and its atomic number is one.
Every helium atom has two protons and its atomic number is two.
And so on. This permits you to order the elements in the periodic table in increasing atomic number.
There are no two elements with the same number of protons (atomic number) and all the atoms of a same element have the same number of protons.
Answer:
The magnitude of Adams' force is 88 N
Explanation:
According to Newton's law ∑ forces in direction of motion is equal to
mass multiplied by the acceleration
There are two forces here the friction force and Adams' force
Adams' force is in direction of motion
Friction force is opposite to direction of motion
→ Friction force = μ R,
where μ is the coefficient of friction and R is the normal reaction force
of the boat
→ R = mg
where m is the mass of the boat and g is the acceleration of gravity
→ m = 47 kg , g = 9.8 m/s²
→ R = mg
Substitute the values in the rule
→ R = 47 × 9.8 = 460.6 N
→ Friction force = μ R
→ μ = 0.13 , R = 460.0 N
Substitute the values in the rule
→ Friction force = 0.13 × 460.0 = 59.878 N
→ ∑ Forces in direction of motion = mass × acceleration
→ F - Friction force = mass × acceleration
→ Friction force = 59.878 N , m = 47 kg , a = 0.6 m/s²
Substitute the values in the rule
→ F - 59.878 = 47 × 0.6
→ F - 59.878 = 28.2
Add 59.878 to both sides
→ F = 88.078 N ≅ 88 N
The magnitude of Adams' force is 88 N
Answer: 1.81m
Explanation:
Given the following:
Horizontal speed = 4m/s
Height of table = 1m
Taking the vertical component of the motion:
Using:
S = ut + 0.5 at^2
Where, S = height of table, a = acceleration due to gravity (9.8m/s^2), t = time and u = Initial Velocity in vertical direction = 0
1 = 0(t) + 0.5(9.8)t^2
1 = 4.9t^2
t^2 = 1 / 4.9
t^2 = 0.204081
t = sqrt(0.204081)
t = 0.452s
For Horizontal :
Gravitational acceleration is absent, therefore distance can be calculated using:
Distance = Velocity × time
Distance = 4m/s × 0.452s
Distance = 1.808 m
Distance = 1.81m
B) renewable energy source
C) water contamination near plants
D) radiation exposure can cause cancer
Next:
The process shown in this diagram contributed great amounts of heat to the young planet Earth and is best known as radioactive
A) decay.
B) fission.
C) fusion.
D) isotope.
(Diagram in attachments)
0.057
0.57
1.75
17.5