1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alexxx [7]
2 years ago
13

Pls help needs to be done soon thxs

Physics
2 answers:
Pie2 years ago
8 0

Answer:

Valence electrons are the electrons in the outermost shell, or energy level, of an atom.

Example:

Oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.

const2013 [10]2 years ago
4 0
Is the electrons in the energy shell of an atom
You might be interested in
Match the following:
artcher [175]

Answer:

Matching of Part A with Part B

Rutherford ------------ discovered proton nucleus

Bohr----------------------postulated the quantum atom

Dalton-------------------Father of atomic theory

Chadwick --------------discovery of neutron

J.J. Thomson----------discovered the electrons

hence , the matching will be

 2 -- d                        

 3 -- e                  

 4 -- b                  

 5 -- a                  

 6 -- c                  

7 0
3 years ago
If there are no unbalanced forces acting on an object, according to Newton's First Law:
Sergio039 [100]

I think its b because when there is unbalanced forces it accelerates.

Hope this helps you out

4 0
3 years ago
The big bang theory has finally answered one of the biggest questions of science—the origin of the universe.
ss7ja [257]

Answer:

False

Explanation:

According to the big bang theory, matter was an infinitely small and very high density point which at one point exploded and expanded in all directions, creating what we know as our Universe, which also includes space and time . This happened about 13.8 billion years ago. Theoretical physicists have managed to reconstruct this chronology of events from 1/100 of a second after the Big Bang. After the explosion, while the Universe expanded, it cooled sufficiently and the first subatomic particles were formed: Electrons, Positrons, Mesons, Barions, Neutrinos, Photons among others. Today more than 90 particles are known. This theory solves many unknowns and is very well received by the scientific community, however there is still much to solve, for example, one of the great unsolved scientific problems in the expanding Universe model is whether the Universe is open or closed.

An attempt to solve this problem is to determine if the average density of matter in the Universe is greater than the critical value in Friedmann's model. The mass of a galaxy can be measured by observing the movement of its stars; multiplying the mass of each galaxy by the number of galaxies, it is seen that the density is only 5 to 10% of the critical value.

6 0
3 years ago
point) A circular swimming pool has a diameter of 12 m. The circular side of the pool is 3 m high, and the depth of the water is
Sergio [31]

Answer:

(a) 86.65 J

(b) 149.65 J

Solution:

As per the question:

Diameter of the pool, d = 12 m

⇒ Radius of the pool, r = 6 m

Height of the pool, H = 3 m

Depth of the pool, D = 2.5 m

Density of water, \rho_{w} = 1000\ kg//m^{3}

Acceleration due to gravity, g = 9.8\ m/s^{2}

Now,

(a) Work done in pumping all the water:

Average height of the pool, h = \frac{H + D}{2}

h = \frac{3 + 2.5}{2} = 2.75\ m

Volume of water in the pool, V = \pi r^{2}h = \pi \times 6^{2}\times 2.75 = 311.02\ m^{3}

Mass of water, m_{w} = \frac{\rho_{w}}{V}

m_{w} = \frac{1000}{311.02} = 3.215\ kg

Work done is given by the potential energy of the water as:

W = m_{w}gh = 3.215\times 9.8\times 2.75 = 86.65\ J

(b) Work done to pump all the water through an outlet of 2 m:

Now,

Height, h = 2.75 + 2 = 4.75

Work done,W = m_{w}gh = 3.215\times 9.8\times 4.75 = 149.65\ J

7 0
2 years ago
A spinning turbine can generate electricity only in the form of a/an _______ current.
lukranit [14]

Answer:

A spinning turbine can generate electricity only in the form of an alternating current.

8 0
3 years ago
Other questions:
  • SOMEONE HELP  ASAP PLSS
    13·2 answers
  • Why would scientist use both relative and absolute dating
    14·1 answer
  • An object has a mass of 24.5 Kilograms and an acceleration of 0 meters per second squared. What would be its first Force in Newt
    12·1 answer
  • The resolution of a microscope describes the scale of the smallest detail that is clearly observable through the microscope. For
    10·1 answer
  • Brody, The dog, is sitting at your feet like a good boy. You throw a dog toy away from you at a speed of 34 m/s (assume constant
    6·1 answer
  • Electric field lines indicate?
    7·1 answer
  • Has anyone ever done the model of an atom lab?
    8·2 answers
  • I need help in this please as soon as possible
    14·1 answer
  • When a photon of light scatters off of a free stationary electron, the wavelength of the photon.
    7·1 answer
  • How can an object's motion be described and predicted?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!