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kirza4 [7]
3 years ago
7

_____ are both ways of preserving current energy resources.

Physics
1 answer:
MakcuM [25]3 years ago
3 0

Answer:

4

Explanation:

I think if not. I am sorry

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A planet’s gravity is related to which of the following? (Points : 5)
katovenus [111]

-- <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
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you find that it behaves as both.</span>


4 0
3 years ago
The _____ numbers equals the _____ of ______ electrons
suter [353]

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 (q=+1.6\cdot 10^{-19}C) and have a mass of approximately m=1.67\cdot 10^{-27}kg
  • 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 (q=-1.6\cdot 10^{-19}C) and are much lighter than protons, having a mass of m=9.11\cdot 10^{-31} kg.

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

8 0
4 years ago
A 2.44 kg block is pushed 1.55 m up a vertical wall with constant speed by a constant force of magnitude F applied at an angle o
svlad2 [7]

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

6 0
4 years ago
Help please asap I'm super lost
vaieri [72.5K]
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.
6 0
3 years ago
Read 2 more answers
What is the theory of super symmetry? a. The theory is the same as the conservation of energy. c. It states that for every parti
SVETLANKA909090 [29]
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
5 0
4 years ago
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