What are the functions of the respiratory system?

Answers

Answer 1

Answer:

- Allows you to talk and to smell.

- Warms air to match your body temperature and moisturizes it to the humidity level your body needs.

- Delivers oxygen to the cells in your body.

- Removes waste gases, including carbon dioxide, from the body when you exhale.

- Protects your airways from harmful substances and irritants


Related Questions

A block and a ball have the same inertia and move with the same initial velocity across a floor and then encounter different ramps. The ramps are identical in every way except for the fact that there is enough friction for the ball to roll without slipping and the block slides without friction up the ramp. Which one makes it furthest up the ramp

Answers

The ball rolling without slipping will make it furthest up the ramp because it has greater kinetic energy.

Conservation of energy

The height rolled by each object can be determined by applying the principle of conservation of energy.

The ball rolling without slipping will have additional rotational kinetic energy.

The block won't have additional rotational kinetic energy.

Total K.E ball > Total K.K block

ΔP.E = ΔK.E

Thus, the ball rolling without slipping will make it furthest up the ramp because it has greater kinetic energy.

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How much force is needed to accelerate a 100 kg car at a rate of 3 m/s

Answers

Formula to find force: acceleration x mass

100 x 3=300
300N is needed (force is measured in newtons)

A light-year is a unit generally used to express the distance that light travels in one year. Which of these can be expressed in the light years?

A] the age of a rock
B] the distance between two stars
C] the speed at which the earth revolves around the sun
D] the time earth takes to complete a revolution around the sun

Answers

Answer: B

A and D are measurements of time and C is a speed. Light-years measure distance.

The option that can be expressed in light years is " the distance between two stars." The correct option is B.

What is a light year?

A light-year is a unit of distance used to measure astronomical distances. It is defined as the distance that light travels in one Earth year in the vacuum of space, which is approximately 9.46 trillion kilometers (5.88 trillion miles). Light travels at a speed of about 299,792,458 meters per second (or approximately 186,282 miles per second), which means that in one year, light can cover a distance of 9.46 trillion kilometers. Light years are commonly used to measure the distance between stars and galaxies, and since space is vast, other units of distance are often not practical.

Here in the Question,

A] The age of a rock is a measure of time, usually in millions or billions of years, and cannot be expressed in light years, which is a unit of distance.

C] The speed at which the Earth revolves around the sun is measured in kilometers per second or miles per hour and represents a velocity, not a distance. Hence it cannot be expressed in light years.

D] The time it takes for Earth to complete a revolution around the sun is measured in days or years and is again a measure of time, not distance. So it cannot be expressed in light years.

Therefore, Only B The distance between two stars is a measure of distance, which can be expressed in light years since it is a vast distance and other units may not be suitable.

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in what unit do we measure electric current?

Answers

Answer:

Ampere

Explanation:

The SI unit of electric current is Ampere (A) after French physicist Andre Ampere who discovered electrical current

11. Which of these is a way to make an electromagnet stronger?
a putting a switch in the electrical circuit
b replacing the iron core with a copper core
© replacing the copper wire with plastic wire
wrapping the wire around the iron core more times

Answers

Answer:

wrapping around the wire around iron core several times

Explanation:

adding more turns to the coil. increasing the current flowing through the coil.

Which telescopes must be placed in orbit around earth in order to observe short-wavelength radiation?.

Answers

Space telescopes must be placed in orbit around earth in order to observe short-wavelength radiation.

What is telescope?

A telescope is an optical instrument that uses lenses, curved mirrors, or a combination of both to watch distant objects.

When atoms in a gas reach this temperature, they travel so quickly that when they collide, they release X-ray photons with wavelengths smaller than 10 nanometers.

Because the Earth's atmosphere prevents all X-rays from space, these wavelengths must be seen using space telescopes.

To study short-wavelength radiation, space telescopes must be put in orbit around the Earth.

Hence, space telescope is the correct answer.

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An electrolyte is . . . . .
question 2 options:


a compound which produces ions dissolved in a solution that do not conduct electric current


a compound which produces ions dissolved in a solution that conduct electric current


only positive ions in solution


a substance which is not important to the human body

Answers

Answer:

b) a compound which produces ions dissolved in a solution that conduct electricity.

NaCl is an electrolyte.

Consider a man walking around a house in a rectangle pattern. He walks 70 feet across the front, 30 feet along the side, 70 feet along the back, and 30 feet along the other side o bring him back to where he began. How much distance did this man cover?

200 feet

100 feet

140 feet

70 feet

Answers

Answer:

200ft

Explanation:

To find out how much distance the man covered, you need to find the perimeter of the rectangle. To find the perimeter of a rectangle, the formula is:

P = (L + H) × 2

Step 1

Plug in the values for L and H.

P = (70 + 30) × 2

Step 2

Add 70 and 30, because you need to add parentheses first.

P = (100) × 2

Step 3

Remove parentheses, and multiply 100 by 2.

P = 100 × 2

P = 200

Thus, the man walked 200 feet in distance.

Chris shines a white light onto a surface, and the surface appears to be green. What color will the surface appear if he shines a combination of blue and green light on the surface?.

Answers

Answer: just realized this is more advanced physics so if this doesn't seem right I apologize, I had a really bad physics teacher lol. So ignore this for now!

Hey there! I think this might just be basic color mixing! The color would be a turquoise

Explanation: R G B make up our visible light spectrum. This has documented graphs. Through basic use of one, you can determine that the color would be a blue-green, commonly referred to as turquoise! There are many more color combinations then just this one as well!

An object of mass weighing 5.24 kilograms is raised to a height of 1.63 meters. What is the potential energy of the object at that height? Note that acceleration due to gravity is 9.8 meters/second2.
A.
65 joules
B.
84 joules
C.
91 joules
D.
1.0 × 102 joules
E.
1.5 × 102 joules

Answers

Answer:

84 joules

Explanation:

potential energy = mgh

5.24×1.63×9.8

= 84 joules

The diagram shows a roller-coaster track. Assume that the system is closed. At point D, the roller-coaster is upside-down and at the top of the vertical loop.

which statement best describes the potential and kinetic energies of a roller-coaster car at point D?

Answers

Yes the answer is C

Please help, im stuck on this question

Answers

Answer:

A) .27 A

Explanation:

v = ir

i = v/r

equivalent r  =   45 * 90 / (45+90) = 30 ohms    ( for the two r in parallel)

i = 8v / 30 ohm = 267 mAmps

If a proton and an electron are released when they are 2.0 * 10-10 m apart (a typical atomic distance), find the initial acceleration of each particle.

Answers

The initial acceleration of proton and electron is 3.45 x 10¹⁸ m/s² and 6.33 x 10²¹ respectively.

What is electrostatic force?

The electrostatic force F between two charged objects placed distance apart is directly proportional to the product of the magnitude of charges and inversely proportional to the square of the distance between them.

F = kq₁q₂/r²

where k = 9 x 10⁹ N.m²/C²

Given is the charge on proton and electron  is q =1.6 x 10⁻¹⁹ C, distance r =2 x 10⁻¹⁰m , then the force will be

F = k q²/r²                          

Substituting the above values in the formula, we get the electrostatic force,

F = (9 x 10⁹) (1.6 x 10⁻¹⁹)²/(2 x 10⁻¹⁰)²    

F = 5.76 x 10⁻⁹ N

The acceleration of electron when both proton and electron released is

acceleration =  electrostatic force / mass of electron

Putting the values, we have initial acceleration of electron

a = (5.76 x 10⁻⁹)/(9.1 x 10⁻³¹)

a = 6.33 x 10²¹ m/s²

The acceleration of proton is due to the electrostatic force of attraction between proton and electron is given by

acceleration =  electrostatic force / mass of proton

inserting the values, we get the initial acceleration

a '= (5.76 x 10⁻⁹)/( 1.67 x 10⁻²⁷)

a'= 3.45 x 10¹⁸ m/s²

Thus, initial acceleration of proton and electron is 3.45 x 10¹⁸ m/s² and 6.33 x 10²¹ respectively.

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Please heelllllpppppppppppopppppop

Answers

Answer:

Explanation:

I'm assuming you need this answer quickly.

Using what we know:

The energy of a single 400 nm photon is 3.1 eV.

So a photon of 412 nm wavelength would have the energy of 4.0 ev.

White light is passed through a filter that only allows only yellow, green and blue light to pass through onto a piece of blue fabric. what color does the fabric appear to have under this light?
a.
red
c.
blue
b.
green
d.
black

Answers

Answer:

White light contains yellow, green, and blue - only the blue light will be reflected giving the blue color.

So the green and yellow light thru the filter will not be reflected and the fabric will still appear blue.

blue is correct

A gas has a variable volume.
True
False

Answers

Answer:

True

Explanation:

Gas always live in free state but some gas is not . We can said that mostly gas volume can be changeable during disturbing by environment situation.

What is the mass of an object that accelerated at 5 m/s2 with a force of 45 n?

Answers

Answer:

9kg.

Explanation:

Data obtained from the question include:

F (force) = 45N

a (acceleration) = 5 m/s2

m (mass) =?

Force is simply the product of mass and acceleration as given by the formula: F = ma. With this formula (i.e F = ma) we can easily calculate the mass of the object. This is illustrated below:

F = ma

m = F/a

m = 45/5

m = 9kg.

Therefore, the mass of the object is 9kg

In Alberta, which of the following statements is true?

A. Only adults must be restrained in a vehicle.
B.All children must have booster seats.
C.Babies must be restrained in the front seat only.
D.All occupants must be restrained in a vehicle.

Answers

The answer is c because I know it

2. What do you understand by balanced and unbalanced force​

Answers

Balanced forces are forces that do not result to change in motion while unbalanced forces are forces that result to change in motion.

What is force?

Force is defined as the product of mass and acceleration of an object. That is Force = mass × acceleration.

Balanced force is a type of force that do not result to change because the forces are equal in size and opposite.

Unbalanced force is a type of force that result to change because forces on the opposite sides are not equal.

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9. An empty, massless cubo is monsured to have all sides equal to 11 cm. It is Ponting in water and will slowly be filled with sand
that has a density of 3.5 g/cm! What volume of sand will cause the box to sink?

Answers

Answer:

please refer to the attachment.

Question 8

If a cheetah can run at a speed of 100 km/h for the initial 500 m of its chase, h
much time would it take to catch its prey that is at a distance of 100 m?
O 1.5 s
O 2.3s
O 3.6s
O 4.8s

Answers

Answer:

3.6 s

Explanation:

100 km/hr =27.77 m/s

100/27.77=3.6 sec

How do u solve this with steps really need help asap

Answers

Answer:

  170 N

Explanation:

Impulse is the change in momentum. Momentum is the product of mass and velocity. These are related to applied force by ...

  F·Δt = m·Δv

__

Here, the velocity goes from 0 to 34 m/s in 0.0116 s. The mass is 0.058 kg. Filling in the given values, we have ...

  F(0.0116 s) = (0.058 kg)(34 m/s)

  F = 0.058×34/0.0116 kg·m/s² ≈ 170 N

The required force is 170 newtons.

What label should mateo place in the marked cell? uses electrical energy provides electrical energy measures electric current controls electric current

Answers

The product label which Mateo should place in the marked cell is that it: B. provides electrical energy.

What is a product label?

A product label can be defined as a paper-document with specific information about the chemical elements, nutrients, and other chemical compounds that are present in a product and its general use or function.

In this scenario, the product label which Mateo should place in the marked cell shown in the image attached below is that, this product was designed and developed to provide electrical energy, based on the electrical symbol for battery.

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explain the causes of atmospheric pressure and why it changes with altitude?​

Answers

Answer:

As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by "thin air." Thin air exerts less pressure than air at a lower altitude

HELP ME NOW PLEASE !!!
A stone of 4.5 kg mass is falling from the top of a 60 m high multi storey building.Find the kinetic energy of the stone when it reaches the ground.

Answers

The kinetic energy will be equal to the potential energy at top

PE=mgh

m is mass

h is height

PE=4.5(60)(9.8)PE=2646J

When charging a fully depleted battery with a 220/240-volt charging dock, 2023 leaf s can be fully charged in about ________.

Answers

When charging a fully depleted battery with a 220/240-volt charging dock, Nissan LEAF can be fully charged in about 7.5h.

What is battery?

It converts the electro chemical energy to the electrical energy when connected across the two ends of the conductor.

The Nissan LEAF comprises of a standard 120-V charging cable.  In order to charge it fully, we need a 220/240Volts battery. The time take take n to fully charge is 7.5 hours.

Thus, when charging a fully depleted battery with a 220/240-volt charging dock, Nissan LEAF can be fully charged in about 7.5 h.

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pls help in these 2 questions

Answers

Answer:

Taking forces along the plane

F cos θ - M g sin θ -100 = M a       net of forces along the plane

F = (M a + M g * .5 + 100) / .866     solving for F

F = (80 * 1.5 + 80 * 9.8 * .5 + 100) / .866 = 707 N

F = 707 N acting along the plane

Fn = F sin θ + M g cos θ       forces acting perpendicular to plane

Fn = 707 * 1/2 + 80 * 9.8 * .866 = 1030 Newtons   forces normal to plane

(this would give a coefficient of friction of 100 / 1030 = .097 = Fn)

Can someone please answer this, ill give you brainliest Would be very appreciated.

Answers

[tex]{\large{\red{\mapsto{\maltese{\underline{\green{\boxed{\blue{\underbrace{\overbrace{\pink{\pmb{\bf{Answer:}}}}}}}}}}}}}}[/tex]

Weather

Explanation:

As during climate only one season change to another and it's a long period of time

while in weather it's can change into any season for few days depending on the relief of the area.

Answer:

weather

Explanation:

There is often confusion between weather and climate. Weather is the condition of the atmosphere at a particular place over a short period of time.

Light of different wavelengths look different ______ to humans:

A.) visible spectrum
B.) electromagnetic spectrum
C.) colors
D.) absorption

Answers

Answer:

C) colors

Explanation:

The wavelengths of light determine the color that we see. Humans cannot see lightwave absorption, but we can see light in the form of colors.

Shorter wavelengths (indicating higher frequencies) look violet,

and Longer wavelengths (indicating lower frequencies) look more red

HELP PLEASE
A bicyclist travels 10 km in half an hour then rests for half an hour, then travels 50 km in three hours. What was the bicyclist’s average speed over the entire trip?

How long would it take an object traveling 12 m/s to go 60 m?

If a car travels 60km/hr, how long would it take the car to travel 300km?

Answers

answer:

Xi + Xf =10km+30km=60km[tex] v \times \frac{x}{t} [/tex]
Other Questions
help would be greatly appreciated! Choose the answer.Use the net to determine the total surface area. Substantive law can best be described as: which phrase describes Jim Crow laws why does the author use the word exploded on page 5 ANYONE PLEASE HELP ME WITH MY ENGLISH HOMEWORK I REALLY NEED THE ANSWER RIGHT NOW I HOPE YALL CAN HELP ME:( please help!!** peptide bond picture is for 1 and 2**1. In this CHEMICAL reaction, what happens to WATER?a.water is not involved in this reaction in any wayb.water goes both "in/enters" and "out/exits" of the reactionc.water goes "into" or "enters" the reactiond.water comes "out of" or "exits" the reaction2. In this METABOLIC reaction, what happens to ENERGY?a.energy goes "into" or "enters" the reactionb.energy is not involved in this reaction in any wayc.energy comes "out" of or "exits" the reactiond.energy goes both "in/enters" and "out/exits" the reaction3.Which pathway depicts transport of a hydrophobic molecule? Why are seeds an evolutionary advantage for seed plants? What mass of Al2O3 is formed in the reaction of 4700 kg of aluminum?Answer in units of kg Which statement is true about organ systems in the human body?Choose 1 answer:(A) if one organ system fails due to a disease, another will take its place.(B) each organ system carries out a unique function in the human body.(C) each organ system works completely alone as it helps the body live and grow. Describe in your own words, why a balloon, after it has been rubbed on a sweater, floats back towards the sweater when released. Your answer must contain electric force, attract, electrons, and protons. The product of two consecutive positive even numbers is 960. What are the numbers? 12. If four coins are flipped, find the probability of obtaining two heads and two tails. According to the details in this scenario, would JulianShah be considered a humanist writer?Julian Shah writes extremely popular mystery novels.His latest book is about a government spy, and his mostwell-known book is about a detective who is also aprofessorO Yes; he focuses on human subjects.O Yes; his books are very popular.O No; he writes about powerful people.O No; he writes mysteries. Jackson is told that he will be given 1 cent for working today. However, for each day he works, he will get double the pay. So, on day 2, he gets 2 cents, on day 3, 4 cents, and so on. Jackson thinks, no way, thats not much money. But if he agrees, how much will he make on day 20? What is a constant in an investigation? The word aspire means to wish or aim for something. What does it mean to aspire to college? What is the surface area of this triangular prism? (100 POINTS AND BRAINLIEST)1. What are the four groups of carbon compounds found in living things? 2. Classify each substance as either sugar, starch, protein, or nucleic acid.a. the major compound that makes up the skinb. glucosec. the major compound in potatoesd. DNA 3. What is the difference between saturated and unsaturated fat? Why are partially hydrogenated fats useful for making potato chips but not particularly healthy for humans to eat? Find the x-intercept and the y-intercept of the line below. Click on "None" if applicable.