Which element is represented by the atomic model below
A. Calcium
B. Neon
C. Oxygen
D. Helium
Answers
Answer:
b
Explanation:
because f its electronic configuration 2:8 indicating that it has 8 electrons in its outer most energy level
Related Questions
Una persona puede oír sonidos cuyas longitudes de onda están comprendidas entre 17 m y 0,017 m. Si se considera que la velocidad del sonido es de 340 m/s, las frecuencias de los sonidos que oye, se encuentran entre:
Answers
Opposite poles attract (N-S) while similar poles (N-N or S-S) repel.
Answers
14. Do loud sounds travel faster than soft sounds? Why or why not?
Answers
Answer:
The rarefaction particles are further apart when the sound is soft. Do loud sounds travel faster than soft sounds? No. Both travel at the same speed.
When entering an expressway, in the acceleration lane you should: A search for a gap in traffic and adjust your speed to the speed of the traffic. B set the cruise control for highway speed. C make a complete stop and check traffic for a suitable gap. D get as close to the vehicle ahead as possible so you can merge into the same gap.
Answers
Answer:A
Explanation: search for a gap in traffic and adjust your speed to the speed of the traffic.
What is the total kinetic energy of a hoop of radius 1 m and mass 2 kg that rolls at an
angular velocity of 1 rad/s?
Answers
Answer:
12
Explanation:
What is the total kinetic energy of a hoop of radius 1 m and mass 2 kg that rolls at an
angular velocity of 1 rad/s?
Because cosmic distances are so vast, astronomers use light-years as their unit of distance. One light-year is defined as _______________________. The nearest star is a little more than ____ light-years away from us. When we see light from a galaxy 2 million light-years away, it has taken _______________ to reach us. Light from the Sun takes ___________ to reach us.
Answers
Answer:
Because cosmic disaster are so vast, astronomers use light-years as their unit of distance. One light-year is defined as the distance a beam of light travels in one year. The nearest star is a little more than 4.37 light-years away from us. When we see light from a galaxy 2 million light-years away, it has taken 2 million Earth years to reach us. Light from the Sun takes approximately 8.4269 minutes to reach us
Explanation:
i) One light-year is defined as the distance a light beam travels in a time of one Earth year. One light year is equivalent to 6 × 10¹² miles or 9.7 × 10¹² km
ii) The distance to the nearest star = 4.37 light-years
iii) When a star located in a galaxy that is 2.3 million light years away is seen, it has taken 2.3 million light years to reach us
iv) The distance of the Sun to the Earth = 151.58 million kilometers
The speed of light, c = 299792.458 km/s
The time it will take light to reach us from the Sun, 't', is given as follows;
t = 151.58 × 10⁶ km/(299792.458 km/s) ≈ 8.4269 minutes.
¿Cuál de la plantas generadoras de electricidad te parece que tiene mas respeto por el medio ambiente?
Answers
Which of the following does light demonstrate?
A. Both particle and wave characteristics
B. Particle characteristics only
C. Neither particle nor wave characteristics
D. Wave characteristics only
Answers
Answer:
A
Explanation:
Light has both wave and particle characteristics. It behaves as wave in examples such as Reflection, refraction, diffraction, interference. It behaves as a particle in photoelectric effect, compton's effect etc. Light is an example of wave-particle duality.
Light demonstrate both particle and wave characteristics. It can be understood by photo electric effect .
What is light?Light behaves like a particle in some phenomenon , for example photoelectric effect and like wave in some phenomenon , for example reflection and refraction , in this wave light has dual nature.
What is Photoelectric effect ?Emission of photo electrons due to incidence of light on a surface, is called photo electric effect. For it the energy of the incident light should be greater than the work function of the material on which light incidents.
To know more about photo electric effect and light
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The SI units for force are what?
Answers
Answer:
The SI unit of force is Newton.
Explanation:
Newton is denoted by N.
Force can be defined as the pull or push which change or try to change the state of a body from motion to rest or rest to motion in a straight line.
When a 3.25 A current flows across a resistor, the voltage drops by 212 V. What is the resistance?
Answers
Answer: 65 ohm
Explanation:
A clock draws 2.0 watts of power to operate and is in operation 8,600 hours per year. The energy usage of the clock, in kWh per year, is closest to
Answers
Answer:
the energy usage of the clock per year is 17.2 kWh
Explanation:
Given;
power drawn by the clock, P = 2 W
duration of the clock's operation, t = 8,600 hours per year
The energy usage of the clock per year is calculated as;
E = Pt
[tex]E = (\frac{2}{1000} )kW \ \times \ 8,600 \ hr\\\\E = 17.2 \ kWh[/tex]
Therefore, the energy usage of the clock per year is 17.2 kWh
can someone mark the brainliest?
Answers
Answer:
I think I can have a good day
Answer:
What do you mean by your question?
You are pushing a 20 N object for 3 meters. If you have to push
vith 30 N to do this, how efficient is your work?
Answers
Answer:
For the first equation, the work done would be 60 J, but if it is done with 30 N, it would have been 90 J.
Explanation:
it's actually pretty easy one you practice it for some time. W ( work done in joules ) = F ( force put onto the object in newtons ) * D ( distance traveled in meters ).
Push is defined as a force that moves an object out of its resting position and away from the person exerting the push. When something is pushed, it usually moves away. Examples of push force include kicking a ball, shutting a door, pushing a cart, and plugging something in.
What role of force in push to work?A push or pull that causes something to move is called a force. Every day, whether you're playing soccer, pushing a shopping cart, or pulling mittens onto your hands, you're moving objects!
An example of a push force is the force you use to push up against a wall. The force you use to pull a trolley vehicle is an example of pull force.
Every force is a push or a pull. A push occurs when an object is forced to move away from something. A pull occurs when an object is drawn toward you by force. Energy, friction, and gravity all have an impact on how strong or weak the force is.
Therefore, Once you practice it for some time, it's actually rather simple. Work in joules is equal to force on an object in newtons multiplied by D. (distance traveled in meters).
Learn more about work here:
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Not a question, but I need help on the last two questions I posted, preferably no links, please...
Answers
Answer:
ok...
Explanation:
Answer:
ive gotten links for answers that really looked like a virus
Explanation:
A periodic wave has a wavelength of 0.60 m and a speed of 40 m/s. What is the
wave frequency?
Answers
The current through a 12W resistor in an electric circuit is 1.5A. Calculate the potential differences across the resistor
Answers
Answer:
Potential difference = 8 Volts
Explanation:
Given the following data;
Power = 12 Watts
Current = 1.5 A
To find the potential difference;
Power = current * voltage
12 = 1.5 * voltage
Voltage = 12/1.5
Voltage = 8 Volts
Therefore, the potential difference which is the same as voltage is 8 Volts.
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Healthy human lungs look pink and spongy from the outside. The left lung is a little smaller than the right lung to make room for the heart. The lungs and heart are both protected by the rib cage. In the lungs, each main bronchus branches off into many smaller bronchi. The bronchi become smaller and smaller, and the smallest bronchi are called bronchioles. There are about 30,000 bronchioles in each lung, each about the same thickness as a strand of hair. The inhaled air eventually ends up in tiny air sacs called alveoli at the end of each bronchiole. There are about 300 million alveoli in each lung. They are covered with capillaries, tiny blood vessels that are only one cell thick. Oxygen travels from the alveoli through the capillaries to the bloodstream, heart and other cells
Which of these best represents the progression of bronchi, bronchioles and alveoli in the lungs?
A tree trunks that become smaller branches and twigs
B a tight flower bud that has opened into a full bloom
C whole apples that are sliced into separate wedges
D a bridge that crosses two rivers
Answers
Answer:
the answer is a because I saw it in a syllabus
Answer:
just doing this so you can give brainliest to the other person
have a great day!
Explanation:
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Hydrogen fuel cells produce electricity by combining ___________ and ___________atoms.
Question 5 options:
hydrogen and oxygen
carbon and oxygen
hydrogen and carbon
Answers
Hello!
My best guess would be hydrogen and oxygen.
hopefully this helps!
The flow of electric current through a gas without any external influence (ionizer) is called
Answers
Answer:
self-maintained discharge
Explanation:
A body is thrown up with a velocity of 78.4 m per second.How high will it rise and how much time it will take to return to its point of projection
Answers
Answer:
The maximum height reached by the body is 313.6 m
The time to return to its point of projection is 8 s.
Explanation:
Given;
initial velocity of the body, u = 78.4 m/s
at maximum height (h) the final velocity of the body (v) = 0
The following equation is applied to determine the maximum height reached by the body;
v² = u² - 2gh
0 = u² - 2gh
2gh = u²
h = u²/2g
h = (78.4²) / (2 x 9.8)
h = 313.6 m
The time to return to its point of projection is calculated as follows;
at maximum height, the final velocity becomes the initial velocity = 0
h = v + ¹/₂gt²
h = 0 + ¹/₂gt²
h = ¹/₂gt²
2h = gt²
t² = 2h/g
[tex]t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2\times 313.6}{9.8} }\\\\t = 8 \ s[/tex]
Which class of lever has mechanical advantage less than one?
. first class lever
. second class lever
. third class lever
Answers
Answer:
first class lever
Explanation:
Explanation:
first class leverhope it is helpful to you
What is an atom called after it was proven wrong
Answers
Answer:
An atom is the smallest unit of ordinary matter that forms a chemical element.
Matter is composed of very tiny or microscopic particles called "Atom".
(According to Dalton atomic theory some of his principles were wrong and later was corrected but the definition of an atom was right in his theory).
Compare White light passes through a
green pane of glass and shines on a
white shirt. Compare the colors of light
that are absorbed, reflected, and trans-
mitted by the glass and by the shirt.
Answers
Answer:
White light passes through a translucent pane of glass, and shines on a shirt. Both the translucent glass and the shirt appear green. ... The shirt reflects green so there is nothing for the shirt to absorb.
Explanation:
The white light that are not green are absorbed by the surface while the green light is scattered
Shirt will reflect green as their is nothing for the shirt to absorb
What is absorption of light?It is the process in which light is absorbed by matter and converted into energy
When white light falls upon a green surface all the component of white light that are not green are absorbed by the surface while the green light is scattered, when that scattered light fall on white shirt , shirt will reflect green as their is nothing for the shirt to absorb
Learn more about absorption of light
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what's Quantum Mechanics?
Answers
Answer:
The branch of mechanics deals with the mathematical description of the motion and interaction of subatomic particles, incorporating the concepts of quantization of energy, wave–particle duality, the uncertainty principle, and the correspondence principle is Quantum Mechanics.
Answer:
Explanation:
Quantum Mechanics is a branch of physics that deals with sub-atomic particles and their energy states. Its theory says at subatomic level, energy exists in discrete levels as "quanta" and particles behave as waves.
Which of the following would cause the force of kinetic friction to increase?
A. An increase in us
B. A decrease in uk
C. A decrease in us
D. An increase in uk
Answers
Answer:
c
Explanation:
Mr. Barcena reached a top speed of 5m/s in 2 seconds from rest, what was his average acceleration including units?
correct answer is not here
.25
OO00
5.2
2.5
Answers
Answer:
Explanation:
The equation for acceleration is
[tex]a=\frac{v_f-v_0}{t}[/tex] where vf is the final velocity and v0 is the initial velocity. Filling in:
[tex]a=\frac{5-0}{2}[/tex] so
a = 2.5 m/s/s
According to the law of conservation of energy, which statement must be
true?
O A. The total energy in a system can only increase over time.
B. Energy that is transformed is neither destroyed nor created.
C. There is only one form of energy
D. Energy can change only from nuclear to chemical.
Answers
Answer:
B
Explanation:
Energy is neither created nor destroyed, the law of conservation states that.
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There are 4 springs stretched by the same mass. Spring A stretches 25 cm. Spring B stretches 10 cm. Spring C stretches 100 cm. Spring D stretches 1 cm. Which spring is strongest?
A
B
C
D
Answers
yeah definitely spring c
An incline plane is 12-m long and 4-m high. A block is pulled up the ramp with a spring scale. The reading on the spring scale is 70-N. How many Newtons would the block actually weigh if you had to lift it the 4-m height?
Answers
Answer:
W = 210 N
Explanation:
For an ideal machine:
[tex]Work\ In = Work\ Out\\(P)(L)=(W)(H)[/tex]
where,
P = Effort = Spring Scale Reading = 70 N
L = Effort Arm = Length of inclined plane = 12 m
W = Actual Load (Weight) to be lifted = ?
H = Load Arm = Height = 4 m
Therefore,
[tex](70\ N)(12\ m) = (W)(4\ m)\\\\W = \frac{(70\ N)(12\ m)}{4\ m}[/tex]
W = 210 N
10. What is momentum of the water bottle before the collision? (read the
scenario again)
0 kg*m/s
O 5 kg*m/s
7 kg*m/s
O 10 kg*m/s
Answers
Answer:
O ksm/s
Explanation:
before collision,
Velocity =0
So,momentum of the bottle before collision=mass ×velocity
=mass×0
=0 kgm/s