HELP PLEASE!!! ASAP. I NEED THE DEFINITONS.

Answer:

a. Mucous membranes protect the inside parts of your body that are exposed to air, in a similar fashion to how your skin protects your external body. Mucous membranes are rich with mucous glands that secrete mucus to help keep the membranes moist.

b.Nose hairs act as a filter that prevents dust, pollen, and allergens from entering your lungs. When particles enter your nose, they get stuck on a thin layer of mucus that coats your hairs. Eventually, the particles either get sneezed out or swallowed. Your nose is also filled with microscopic hairs called cilia.

.

c.The epiglottis is a small, movable "lid" just above the larynx that prevents food and drink from entering your windpipe. But if the epiglottis becomes swollen — either from infection or from injury — the airway narrows and may become completely blocked.

d.Coughing can have causes that aren't due to underlying disease. Examples include normal clearing of airways, irritants such as smoke and gas, tobacco use or improperly swallowing food and liquids.

e.In humans there are about 15 – 20 incomplete C-shaped cartilaginous rings which reinforces the anterior and lateral sides of the trachea to protect and maintain the airway open. (The cartilaginous rings are incomplete because this allows the trachea to collapse slightly to allow food to pass down the esophagus.

f. .Pulmonary surfactant is a surface active material composed of lipids and proteins which is found in the fluid lining the alveoli.

g.The pleura includes two thin layers of tissue that protect and cushion the lungs. ... The very thin space between the layers is called the pleural cavity. A liquid, called pleural fluid, lubricates the pleural cavity so that the two layers of pleural tissue can slide against each other.

h.The ribs are the bony framework of the thoracic cavity. The ribs form the main structure of the thoracic cage protecting the thoracic organs, however their main function is to aid respiration. There are twelve pairs of ribs. Each rib articulates posteriorly with two thoracic vertebrae by the costovertebral joint.

Answer:

the answer would be conductors

Answer: I do not know what your observations were, but objects with a higher mass and objects traveling at a faster velocity have a higher kinetic energy. The reverse is true of course for less KE.

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Hope this helps.

MM4343

The correct statement that explains the observation using Newton's laws is objects at rest tend to remain in their current state of motion unless acted upon by an unbalanced force, but objects in motion require a continual application of force to stay in motion. Here option A is correct.

According to Newton's first law of motion, an object will continue moving at a constant velocity in a straight line unless acted upon by an external force. In this case, when the cannonball is shot horizontally from the cannon, it initially possesses a forward velocity due to the force applied by the cannon. However, once the cannonball is in motion, the only forces acting on it are gravity and friction.

Gravity acts vertically downward, causing the cannonball to accelerate downward. Friction acts horizontally in the opposite direction to the motion of the cannonball. As the cannonball moves forward, friction opposes its motion and gradually slows it down.

Since there is no force continuously propelling the cannonball forward, and the forces of friction and gravity act on it, the cannonball eventually comes to a stop and falls to the ground. Hence option A is correct.

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Answer:

The main role of neutrons is to reduce electrostatic repulsion inside the nucleus.

Explanation:

:) Good luck my friend

Answer: 25.04m/s

Explanation:

v^2 = v^2o + 2a(x-xo)

v^2 = velocity 

v^2o = initial velocity 

a = acceleration 

x = final position/distance 

xo = initial position/distance

In this case, the initial velocity is 0 since the ball wasn't moving before it was dropped. The final position is 32 as the motion ended after the ball traveled 32m. The initial position is 0. The acceleration is 9.8m/s (free fall). Plug these numbers into the formula: 

v^2 = 0 + 2(9.8)(32)

v^2 = 25.04396135 

Round to get 25.04m/s

Answer:

Below

Explanation:

You can use this equation to find the distance :

     distance = velocity x time

     distance = (26.7)(3.06)

                    = 81.702 m

Rounding to 3 sig figs

     = 81.7 m

Hope this helps

When a large, positively charged conducting sphere is touched by a small, negatively charged conducting sphere,

a. charges flow until both spheres have the same potential.

b. The larger sphere gains some negative charge from the smaller sphere, while the smaller sphere loses some of its negative charges.

When a large, positively charged conducting sphere is touched by a small, negatively charged conducting sphere, charges flow from the smaller sphere to the larger sphere until both reach the same potential.

The potential is the measure of electrical potential energy per unit charge, so when the two spheres have the same potential, they have equal electrical potential energy per unit charge.

Regarding the charges on the two spheres, we can say that the large sphere gains some negative charge from the smaller sphere, while the smaller sphere loses some of its negative charges. This is because charges always flow from a higher potential to a lower potential until both reach the same potential. The larger sphere had a lower potential than the smaller sphere because it was positively charged, so charges flowed from the higher potential (the smaller sphere) to the lower potential (the larger sphere).

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Answer:

The second person will have a velocity of 0.85 m/s in the opposite direction of the first person.

Explanation:

Law Of Conservation Of Linear Momentum

The total momentum of a system of bodies is conserved unless an external force is applied. The formula for the momentum of a body with mass m and velocity v is:

P=mv.

If we have a system of bodies, then the total momentum is the sum of them all

\(P=m_1v_1+m_2v_2+...+m_nv_n\)

If a collision occurs, the velocities change to v' and the final momentum is:

\(P'=m_1v'_1+m_2v'_2+...+m_nv'_n\)

In a system of two masses, the law of conservation of linear momentum is:

\(m_1v_1+m_2v_2=m_1v'_1+m_2v'_2\)

According to the conditions of the problem, two persons standing on a frictionless surface are initially at rest (v1=0, v2=0). Their masses are m1=50 Kg and m2=65 Kg. After the push, one person (say m1) moves backward at v1'=-1.1 m/s. We can calculate the speed of the other person by solving for v2':

\(\displaystyle v'_2=\frac{m_1v_1+m_2v_2-m_1v'_1}{m_2)\)

Substituting:

\(\displaystyle v'_2=\frac{50*0+65*0-50(-1.1)}{65)\)

\(\displaystyle v'_2=\frac{55}{65}\)

\(v'_2=0.85 \ m/s\)

The second person will have a velocity of 0.85 m/s in the opposite direction of the first person.

Answer: the water level would rise since the pebble displaces minimal water compared to the boat.

Explanation:..........

Space ships travel at a speed close to the speed of light earth respect to earth.

If the speed of light is the same for all inertial reference frames. An inertial reference frame is one (earth) in which newlines laws are valid. All inertial reference frames move with constant velocity- redeliver to one there. ex:- If we are moving at a speed of light relative to you, then it was moving at the same speed as me relative to you. In this case, both are roving at a speed of \($0 \mathrm{~m} / \mathrm{s}$\) reflecting.

B. some of your physical dimensions are smaller than normal.

No. physical dimensions do not change the spaceship relative to the stallion with respect to earth.

C. pulse rate does not change. If a person in a spaceship moves with a speed of light, with respect to earth, because floral inertial reference frame velocity is constant. So pulse rate does not change

Answer for the given None of these effects occurs.

What is spaceship travelling?

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For most everyday objects, scientists use a balance to obtain an object's mass. A balance compares an object with a known mass to the object in question. One example of a balance is the triple beam balance.

Answer:

\(\boxed {\boxed {\sf 243.75 \ J }}\)

Explanation:

Kinetic energy is energy an object has due to motion. The formula is:

\(KE=\frac {1}{2}mv^2\)

The mass of the object is 78 kilograms and the velocity is 2.5 meters per second.

\(m= 78 \ kg \\v= 2.5 \ m/s\)

Substitute the values into the formula.

\(KE= \frac {1}{2} (78 \ kg)*(2.5 \ m/s)^2\)

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, and Subtraction. Solve the exponent first.

\(KE= \frac {1}{2}(78 \ kg)*6.25 \ m^2/s^2\)

Multiply all three numbers together.

\(KE=39 \ kg * 6.25 \ m^2/s^2\\\)

\(KE=243.75 \ kg*m^2/s^2\)

1 kilogram meter squared per second squared is equal to 1 Joule. So, our answer of 243.75 kg *m²/s² is equal to 243.75 Joules.

\(KE=243.75 \ J\)

The object has 243.75 Joules of kinetic energy.

Answer:That only applies to highly polished surfaces, eg mirrors.

If you take a high quality laser (ie with low divergence) and aim it at a wall, you can see the spot where the laser beam reaches the wall from anywhere with a direct line-of-sight to the spot where the laser beam reaches the wall. This due to micro imperfections on the surface of the wall. At a microscopic level, the wall surface is very rough and pointing in all directions.

As to why, a beam of light bounces of a highly polished surface, I can only surmise that it is essentially due to kinematics, ie the only force opposing the light beam is normal to the surface, hence there no forces along the reflective surface. Since there are no forces along the reflective surface, the speed component of light along the reflective surface remains unchanged. However, on the plane perpendicular to the reflective surface the, the light photons bounce off at the same speed at which the hit the reflective surface because the mass of the reflective surface is much much much larger than the mass of the photons, which means that the reflective surface won’t move at all. Since conservation of momentum requires that momentum after the collision be the same as the momentum before the collision then the only way for that to happen is if the velocity of the photon perpendicular to the reflective surface is of exactly the same magnitude but in the opposite direction. Vector resolution of the speed component of the reflected beam means that the angle of reflection must be the same as the angle of incidence.

Explanation:

Answer:

Well if they playing a game like that

Answer:

Hello your question lacks some very vital information hence I will give you a general equation where you can input the missing values and get your answer

answer :  mass of Bananas ( m ) = \(\frac{A^2}{V^2} * K\)

To calculate for weight of Bananas  = m * g      where g = 9.8

Explanation:

Given an amplitude ( A )= 29.8981

Spring constant = x ( unknown )

maximum speed of Bananas( v ) = wA  ( unknown )

question : calculate the weight of the bananas

First  step : calculate the period of oscillation

T = \(\frac{2\pi }{vA}\) --- ( 1 )

next step : express T in terms of mass ( m ) of the bananas

= \(2\pi \sqrt{\frac{m}{k} } = \frac{2\pi }{vA}\)

∴ m/k = A^2 / v^2

hence  mass of Bananas ( m ) = \(\frac{A^2}{V^2} * K\)

To calculate for weight = m * g

The probability that a random sample of size 54, selected with replacement, will yield a sample mean greater than 4.1 but less than 4.4 is approximately 0.219.

In statistics, when taking a random sample with replacement, each observation has an equal chance of being selected at each draw. The sample mean is calculated by summing all the observations and dividing by the sample size. In this case, the sample mean must fall between 4.1 and 4.4, inclusive.

To find the probability, we need to determine the range of values that the sample mean can take. Since the means are measured to the nearest tenth, we consider all values greater than 4.1 and less than or equal to 4.4. This creates a range of 0.3 units.

Next, we calculate the standard deviation of the population, which is the square root of the variance. Since we're selecting with replacement, the population standard deviation remains the same throughout the sampling process.

With the sample size of 54, we divide the range of 0.3 by the standard deviation divided by the square root of the sample size (√54) to obtain the z-score. Using a z-table or calculator, we find the probability associated with the z-score, which is approximately 0.219.

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The velocity is defined as the rate of change of displacement per unit time and the unit of velocity is m/s. Velocity is of two types and they are average velocity and instantaneous velocity.

A) From the given graph, object B traveled faster when compared with object A. Because the speed of object B increases gradually with time whereas the speed of object A decreases with time. Hence, object B travels faster.

B)The velocity increases with time 2s to 4s. The velocity is defined as the rate of change displacement by time taken. v = Δx/Δt, where Δx is the change in displacement and Δt is the time taken. Δx = final.dis - initial dis = 0-(-4) = 0+4 = 4 m. Δt = final.time-ini.time = 4-2 = 2s. Thus, the velocity v = 4/2 = 2 m/s. Hence, the velocity increases gradually.

C) The acceleration is defined as the rate of change of velocity per unit time. From the given graph, the change in velocity does not change, and hence Δv = 0. Acceleration a = Δv/Δt = 0. Thus, the acceleration of the object is zero.

D) Acceleration (a) is the rate of velocity per unit time and the unit of velocity is m/s². Acceleration (a) = Δv/Δt, where Δv is the change in velocity. Δv = final.velocity - initial.velocity = 8-(-2) = 8+2 = 10 m/s. Δt = final. time-initial. time = 7-3 = 4s. a = 10/4=2.5m/s². Hence, the acceleration is 2.5m/s².

E) Force is the product of mass and acceleration. From the given, the force moves in both forward and backward directions, and hence, force is a vector quantity. F(net) = F₁+F₂=18 - 6 = 12N. The mass of the cart is 2kg.

F = ma

a = F/m

  = 12/2

  = 6 m/s²

Thus, the acceleration of the cart with a mass of 2kg is 6 m.s⁻².

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By definition, Weight is a measure of the force of gravity pulling down on an object. it is measured in newtons (N), the common unit for measuring force.

Weight is called the action exerted by the force of gravity on the body.

The mass (amount of matter that a body contains) of an object will always be the same, no matter where it is located. Instead, the weight of the object will vary according to the force of gravity acting on it.

The formula that allows you to calculate the weight of any body is:

P = m×g

where:

Then, the weight of an object is the force of gravity on the object, that is, the weight will vary according to the force of gravity that acts on it. So the correct answer is:

Weight is a measure of the force of gravity pulling down on an object. it is measured in newtons (N), the common unit for measuring force.

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When two dissimilar metals are joined across the junction and maintained at different temperature(T) a potential difference(V) is developed; Electrons drift from one metal to the other. Both Assertion and Reason are true, but Reason is not a correct explanation of Assertion. The correct answer is option B.

Explanation: An electromotive force (EMF) is generated between two dissimilar metals joined together when they are maintained at different temperatures. If the temperature difference is maintained at the junction between two dissimilar metals, a voltage(V) is produced between the two metals. When two dissimilar metals are joined, the metal with a higher electron affinity tends to gain electrons(e) from the metal with a lower electron affinity, leading to the development of a potential difference or EMF, which drives the electron flow between the metals. Therefore, both Assertion and Reason are true, but Reason is not a correct explanation of Assertion. The reason behind it is that although electrons drift(Eo) from one metal to the other, this statement does not justify the phenomenon of potential difference development between the dissimilar metals.

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Answer:

Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.

Answer: Often lightning occurs between clouds or inside a cloud. But the lightning we usually care about most is the lightning that goes from clouds to ground.

Explanation:  As the storm moves over the ground, the strong negative charge in the cloud attracts positive charges in the ground.

The possible magnitude for the force of static friction on the stationary cart is 72.1 N.

The given parameters:

Based on Newton's second law of motion, the force applied to object is directly proportional to the product of mass and acceleration of the object.

F = ma

Static frictional force is the force resisting the motion of an object at rest.

\(\Sigma F = 0\\\\F -F_f = 0\)

where;

\(F_f\) is the frictional force

\(F= F_f \\\\72.1 = F_f\\\\F_f = 72.1\ N\)

Thus, the possible magnitude for the force of static friction on the stationary cart is 72.1 N.

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During the first one-ten-thousandth of a second, while antiprotons were abundant, the precise ratio between antiprotons and protons is uncertain.

During the early stages of the universe, specifically within the first one-ten-thousandth (1/10,000) of a second, the universe was filled with high-energy particles and their antiparticles. Antiprotons, which are the antiparticles of protons, were indeed abundant during this period. In terms of the ratio between antiprotons and protons, it is believed that the universe began with equal numbers of particles and antiparticles.

However, as the universe expanded and cooled down, a process known as baryogenesis occurred. Baryogenesis refers to the asymmetry in the production of matter and antimatter, leading to an excess of matter particles, such as protons, over their corresponding antiparticles. Due to the phenomenon of baryogenesis, the number of protons eventually exceeded the number of antiprotons.

The exact details and mechanisms of baryogenesis are still a topic of active research in particle physics and cosmology. However, as the universe evolved, the excess of protons over antiprotons became more pronounced, leading to the dominance of protons and the eventual formation of matter.

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All of the following are examples of aerobic exercise except weightlifting, yoga, and stretching exercises.

aerobic exercise is a type of physical activity that increases your heart rate and breathing for an extended period. It helps improve cardiovascular health, endurance, and overall fitness. Some common examples of aerobic exercises include:

These activities involve large muscle groups and can be sustained for a longer duration. They require oxygen to produce energy and help improve the efficiency of the cardiovascular system.

However, there are certain activities that are not considered aerobic exercises. These include weightlifting, yoga, and stretching exercises, as they do not elevate the heart rate and breathing to the same extent as aerobic exercises.

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Answer:

the ancer is c I know it because I had the same test or it might have been different but it looks familiar to me

The focal length of the mirror is 2.4 cm.

We can use the mirror equation to solve this problem:

1/f = 1/d_o + 1/d_i

where f is the focal length of the mirror, d_o is the distance of the object from the mirror, and d_i is the distance of the image from the mirror.

Plugging in the given values, we get:

1/f = 1/12 cm + 1/3.0 cm

1/f = 0.08333 cm^-1 + 0.33333 cm^-1

1/f = 0.41667 cm^-1

f = 2.4 cm

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Answer:

Explanation:

1 ) Momentum of a race car = mass of car x velocity of car . During a collision , an external  force acts on the car which changes the momentum of the car in the direction in which force acts .

2 )

The momentum of the car decreases as external force acts against the momentum . Sometimes when external force is very high , direction of momentum  is reversed .  

3 ) Impulse is force x time of action of force . Generally time of action of force in large collision  is very small . so it is calculated very carefully .

Impulse = change in momentum .

4 ) The type of collision is inelastic . In this type of collision , car crashes into safer barrier , sticks to it . It does not rebound from the barrier . In case of elastic collision , rebound creates large impulse creating huge damage to the car .

Answer:

Water is a compound because it is made up of water molecules. There is no such thing as water atoms. Water molecules are made of hydrogen and oxygen atoms, in the definite proportion of two hydrogens for one oxygen.