-- <span>The gravitational force that you feel when you stand on the surface
of a planet depends on the planet's mass and size. It has </span><span><span>nothing
to do with the planet's orbit. (</span>Of course,"size" is also related to the
planet's mass, density, and surface area.)
-- One possible cause of deforestation is the removal of trees without
adequate replanting.
-- According to Hubble’s Law, the farther away a galaxy is, the faster
it is moving away from us
-- Electromagnetic energy can be defined as energy that moves at
the speed of light. If you conduct experiments to determine whether
the electromagnetic energy is moving in the form of particles or waves,
you find that it behaves as both.</span>
The atomic number equals the number of protons and electrons (in a neutral atom)
Explanation:
An atom is composed of three types of particles:
- Protons: they are found in the nucleus of the atom. They are positively charged (
) and have a mass of approximately 
- Neutrons: they are also found in the nucleus. They have no electric charge and have a mass slightly larger than that of protons
- Electrons: they orbit around the nucleus. They have negative electric charge (
) and are much lighter than protons, having a mass of 
.
An atom is also identified by two numbers:
- Atomic number (Z): it is equal to the number of protons in the nucleus
- Mass number (A): it is equal to the number of protons+neutrons in the nucleus
For a neutral atom, the net electric charge is zero: this means that the number of protons equals the number of electrons. But since the number of protons corresponds to the atomic number Z, this means that the atomic number is also equal to the number of electrons, for a neutral atom.
Learn more about atoms:
brainly.com/question/2757829
#LearnwithBrainly
Answer:
The work done is L= 49.83 Joules
Explanation:
m= 2.44kg
d= 1.55m
α= 69.6°
g= 9.8 m/s²
μ= 0.691
F= ?
Fy= F*sin(α)
Fx= F*cos(α)
Fr= μ * Fx
Fr= μ * F*cos(α)
W= m*g
W= 23.91 N
Fy - W - Fr = 0
F*sin(α) - W - μ * F*cos(α) = 0
F* ( sin(α) - μ *cos(α) ) = W
F= W / ( sin(α) - μ *cos(α) )
F= 34.3 N
L= Fy * d
L= 49.83 J
A compound is two or more elements combinded together.
A element is a pure substance.
it looks like all of them are compounds except the carbon dixode, My teacher would accept that as a anwser idk bout urs thoughs.
Fam I believe the answer..... is it states that for every particle found there is an identical "mirror" particle that is the same in every way except for spin
