which of the following is a contact force?
a. gravity
b. magnetic force
c. air resistance
d. electrical force
hope this helps.........
The gas-phase reaction between nitrogen and oxygen was carried out in a device designed to maintain constant pressure. There are two cylinders of equal volume with a reaction arrow between them. The cylinder on the left has two molecules of O 2 and two molecules of N 2. The cylinder on the right has four molecules of N O. A constant pressure is applied to both cylinders Write the balanced chemical equation for the reaction between nitrogen oxygen. Include physical states.
Answer:
2N₂(g) + 2O₂(g) ----> 2NO(g)
Explanation:
Gaseous nitrogen and gaseous oxygen reacts in a molar volume ratio of 1 : 1 to produce nitrogen (ii) oxide.
In the reaction, two molecules of nitrogen gas combines with two molecules of oxygen gas in the cylinder to form two molecules of nitrogen (ii) oxide. The equation of the reaction is given below:
2N₂(g) + 2O₂(g) ----> 2NO(g)
Nitrogen (ii) oxide is formed naturally during lightning bolts. The heat released the lightning flashes causes the nitrogen and oxygen in air to combine to form nitrogen (ii) oxide. The nitrogen (ii) oxide formed however, quickly reacts with more oxygen to form nitrogen(ii) oxide.
Nitrogen (ii) oxide is a colorless, poisonous gas. It is slightly denser than air and almost insoluble in water. it is also neutral to litmus.
The balanced chemical equation for the reaction between nitrogen and oxygen is:
2N₂(g) + 2O₂(g) —> 4NO(g)
The equation between nitrogen and oxygen can be written as follow:
N₂(g) + O₂(g) —> NO(g)
The above equation can be balance as illustrated below:
There are 2 atoms of O on the left side and 1 atom on the right side. It can be balance by writing 2 before NO as shown below:
N₂(g) + O₂(g) —> 2NO(g)
Multiply the equation by 2, we have:
2N₂(g) + 2O₂(g) —> 4NO(g)The equation is balanced!
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HELLO PLEASE HELPPP!! WILL GIVE BRAINIEST
Answer: Wavelength
Explanation:
Answer:
C) wavelength
Explanation:
I hope this is right, have a nice day!
What is the total distance of a student who walks 5 blocks west, 5 blocks north, 6 blocks east, and then 5 blocks south?
Answer:
Explanation:
The student walks;
5 blocks west;
5 blocks north
6 blocks east
5 blocks south
Now, distance is sum of all the length of the path covered.
Distance = 5 blocks + 5 blocks + 6 blocks + 5 blocks = 21 blocks
The total distance travel by the student is 21 blocks.
The properties of materials are defined by the _____________ of the atoms in the compound.
A. All of these
B. Arrangement
C. Type
D. Charge
How much tension must a rope withstand if it is used to accelerate a 960 kg car horizontally along a frictionless track at 1.20 m/s²?
Answer:
The tension of the rope is 1152 N
Explanation:
Force
Newton's second law states that the acceleration of an object is directly proportional to the net force and inversely related to its mass.
The law can be written as:
F = m.a
The rope must apply a force F to accelerate the car of m=960 Kg at [tex]a=1.2~ m/s^2[/tex]. Given the track is frictionless, all the force applied produces acceleration, thus:
[tex]F = 960~Kg\cdot 1.2~ m/s^2[/tex]
F = 1152 N
The tension of the rope is 1152 N
newtons second law of physics, solve the chart
Answer:
(from top to bottom)
350 N, 80 kg, 10 m/s^2, 80 kg, -15 m/s^2, -3000 N
Explanation:
Force = Mass*Acceleration (aka F = ma)
Using algebra, you can find the variables/unknown values.
What includes the hippocampus, amygdala and hypothalamus?
Answer:
the limbic system has its input and processing side (the limbic cortex, amygdala and hippocampus) and an output side (the septal nuclei and hypothalamus).
Explanation:
hope it helps
Answer:
limbic system
Explanation:
The "limbic system" is situated under the cerebrum. It is responsible for the person's emotions and memories. Its primary structures include: hippocampus, amygdala, thalamus and hypothalamus.
The "hippocampus" is responsible for obtaining new memories. It is also associated with mental functions like "learning."
The "amygdala" is responsible for emotional memories.
The "thalamus" and "hypothalamus" are responsible for reactions towards the emotions.
The velocity of a car doubles over a short period of time. Which additional information is sufficient to determine the amount of acceleration during this time period?
Answer:
Time and velocity
Explanation:
The time taken for the velocity to double is very important to find the amount of acceleration the car acquires.
Acceleration is the rate of change of velocity with time.
Acceleration = [tex]\frac{v -u}{t}[/tex]
v is the initial velocity
u is the final velocity
t is the time taken
So, the velocity and time is needed to calculate the value of the acceleration the car undergoes.
How is the earth changing??? How would you answer this question at this point???
Write an equation of a line that passes through the point (-9,2) and is perpendicular to the line y = 3x - 12
Answer:
y = (-1/3)x + 5
Explanation:
the gradient of required equation (m2)
the gradient of given equation (m1) = 3
m1*m2 = -1 ( they are perpendicular)
3*m2 = -1
m2 = -1/3
required equation
y = m2 + c
( 9,2) satisfy the above equation
2 = (-1/3)*9 + c
c = 5
y = (-1/3)x + 5
The mass before a reaction is equal to the mass after a reaction? True or false?
Answer:
[tex]\boxed {\boxed {\sf True}}[/tex]
Explanation:
The Law of Conservation of Mass states that mass cannot be created or destroyed.
So, in a chemical reaction, the mass before a reaction and after cannot be different. In other words, the mass of the products must be equal to the product of the reactants.
So, this is a true statement.
It is determined that a certain light wave has a wavelength of 3.012 ×10−12 m. The light travels at 2.99 ×108 m/s. What is the frequency of the light wave? (Round your answer to three significant figures.)
Answer:
Explanation:
velocity=frequency*wavelength
velocity = 2.99*10^8 m/s
frequency = ?
wavelength = 3.012*10^-12
2.99*10^8m/s = (f)(3.012*10^-12)
f=9.58*10^19 Hertz
LITERALLY PLZ HELP I WILL GIVE BRAINLIEST If you had the opportunity to interview an experienced scientist at NASA who has been involved in numerous space explorations, what would you want to know? Identify at least three specific questions that you would ask this scientist and briefly explain why you would ask these particular questions.
Answer:
What was your sleep situation like during your time in space? Did you get more or fewer hours of sleep than when you were on earth? I would be very interested in learning about their answer because they still have to perform tasks that require energy and obviously they would need to sleep but do they have to strap themselves down on a bed so they don't float away? Is it easy to fall asleep in space or would your body be confused because time is so much different that it doesn't even follow the same time zones as on earth? That is why I find this to be interesting for them to answer.
Did you have any activities to do aside from researching and your tasks that were mandatory? What would they have done in their free time? I can’t imagine simply doing work the whole time, did they get to bring along certain games or time wasters to do while in space? I would just be really curious to find out how they occupied their free time or if they even had free time.
What was the most difficult part about being in space? Was it terrifying or was the work overwhelming? Was it scary thinking about returning to earth or staying in space for too long? There are so many ways to answer this question so I would be very interested in understanding their fears and their reason for being afraid.
Explanation:
A piece of magnetite used to find directions is called _____
It's called a "lodestone".
If it's suspended and allowed to turn freely, it behaves like a magnetic compass.
Newton’s third law in own words
Answer:
imma take a guess
Explanation:
- For every force exerted on an object, that object exerts the equal and opposite amount of force back.
or like
- The force exerted is an action, and there will always be a force back, the reaction, in an equal and opposite amount.
Which list places the layers of the sun in the correct order from innermost to outermost?
Corona, photosphere, chromosphere
Photosphere, convective zone, radiative zone
Convective zone, chromosphere, corona
Radiative zone, corona, convective zone
Answer: The answer is A, Corona, Photosphere, Chromoshpere
Explanation:
Just took the test
The Photosphere, Chromosphere, Transition Region, and Corona are the outer layers. Option A is correct.
What are the layer of sun?Corona, photosphere, chromosphere are the layers of the sun in the correct order from innermost to outermost.
The distance is measured from the sun's core for the inner layers and from the sun's surface for the outer layers. The Core and Convection Zone, are the inner layers.
The Photosphere, Chromosphere, Transition Region, and Corona are the outer layers.
Hence, option A is correct.
To learn more about the layer of sun, refer to the link;
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please answer this soon
Answer:
lava plateau-material fills in valleys
caldera goes-bowl shaped depression
volcanic soil-rich in nutrients
shield volcano-wide summit, gentle slope
cinder cone-made of pieces of lava
Explanation:
How does biofuel use differ from solar, wind, and geothermal energy use? a. Biofuels can have a more widespread use. b. Biofuels are less damaging to the environment. c. Biofuels are not a renewable energy source. d. Biofuels cannot be used as an energy source.
Answer:I think it b
Explanation:
The correct answer is option (a) Biofuels can have a more widespread use.
Biofuel is a fuel that is produced from biological process like anaerobic and agriculture digestion. It can be derived directly from plants, agricultural, commercial, domestic and agricultural waste. It has a more widespread use as compared to solar, wind and geothermal energy. Uses of biofuel.
It can be used as an alternative dieselIt can be used for power generation in backup systems when emission is most importantBioheat can be generated from biofuel It can be used to clean oil spills and grease It can be used as a lubricant It can be used as a fuel in stove for cooking It can be used to remove paint and adhesivesHope this helped
A limousine driver notices a stop sign while traveling 55 km/h. What
is the acceleration (in m/s) of the limousine if it comes to a complete
stop in 4.3 52
Interpret the sign of the acceleration - what does it mean?
Answer:
a= -12.64 m/s²
The negative sign means deceleration, which shows that the limousine was slowing down to stop.
Explanation:
The formula for acceleration is :
a= change in velocity / time
[tex]a=v_f-v_i/t\\[/tex]
where;
[tex]v_f=0km/h\\\\v_i=55km/h\\\\t=4.352s[/tex]
a= 0-55 /4.352 = -55/4.352 = -12.64 m/s²
The negative sign means deceleration, which shows that the limousine was slowing down to stop.
Which of the following objects is in equilibrium?
Answer:
C) an object that moves at constant velocity.
Explanation:
It is equilibrium because acceleration is just the speed and force at the beginning, while velocity is the overall speed that has remained constant throughout the cycle of the object's movement.
As Derrick is driving around town, he stops at a red-light. When the light turns green, he takes off and travels
212m in 6.7 seconds. What is his average acceleration?
Answer:
31.6
Explanation:
velocity÷ time
212 ÷ 6.7 = 31.6m/s
Your cat has a mass of 4.5 kg. He is sitting on top of the refrigerator ready to pounce. The refrigerator is 1.8 meters tall. What is his potential energy?
Answer:
79.38 J
Explanation:
W = mgz = 4.5*9.8*1.8 (with g = 9.8 m/s^2)
= 79.38 K
In regard to exercise, which of the following statements about safety consideration is correct?
A.
In hot weather, exercising between 10 a.m. and 4 p.m. is best.
B.
Exercising at 100% of your maximum heart rate is best.
C.
Exercising one hour before eating is best.
D.
Remaining well-hydrated while exercising is best
Answer:
the correct answer is
D.Remaining well-hydrated while exercising is best
MY PASSWORD IS CHANGE
A boy runs with a speed of 3m/s in 5s. How far did the boy run?
Explanation:
the boy ran 15m 3x5 is 15
Answer:
The answer is 15m
Explanation:
[tex]v = \frac{l}{t} \\ l = vt = 3 \times 5 = 15[/tex]
What is the pigment in the leaves called?
1.Chloroplasts
2.Green
3.Stroma
4.Chlorophyll
Answer: D: Chloroplasts
Explanation:
Answer: d
Explanation:
which of the following is a form of kinetic energy?
Answer:
hope this helps.
Explanation:
______
1. An object accelerates 5.0 m/s when a force of 20.0 newtons is applied to it.
What is the mass of the object?
2. An object accelerates 2.0 m/s when a force of 12.0 newtons is applied to it.
What is the mass of the object?
3.An object accelerates 16.3 m/s when a force of 4.6 newtons is applied to it.
What is the mass of the object?
Answer:
1. mass = 4
2. mass = 6
3. mass = 0.28
Explanation:
All these questions require the equation:
F=ma
Where F is force, m is mass and a is accleration. If we do some algebra, we can modify this equation to find mass by dividing both sides by a.
[tex]F=ma --> \frac{F}{a} =\frac{ma}{a} --> \frac{F}{a} = m[/tex]
The a on the left side cancels out and leaves us with [tex]\frac{F}{a}=m[/tex]. Now we can plug in the numbers given to find the mass.
1.[tex]\frac{F}{a} =m-->\frac{20.0}{5.0}=m-->m=4[/tex]
2.[tex]\frac{F}{a} =m -->\frac{12.0}{2.0} =m -->m=6[/tex]
3.[tex]\frac{F}{a}=m--> \frac{4.6}{16.3}=m--> m=0.28[/tex]
So the answers are m=4, m=6, and m=0.28.
what energy changes take place in a glowing electric bulb
Answer:
electrical energy change into heat and light energy.