The medium through which a mechanical wave passes can be a solid, liquid, or gas. Properties of a wave change when it moves from one medium to another. What happens to the speed of a wave when it moves
from a gas to a solid?
A It speeds up.
B. It shows down
c. It remains the same
Dit speeds up and then slows down.

Help pls hurry!!!

a) The maximum concentration at x=500m is 0.34 mg/L.

(b) If the contaminant was uniformly spilled over the 10 m thickness of the aquifer, the maximum concentration at x=500m, y=0, with vertical dispersion=0 is 3.4 mg/L.

(a) Using the advection-dispersion equation with the given parameters, the breakthrough curve was calculated, and the maximum concentration was found to be 0.34 mg/L at x=500m.

(b) With vertical dispersion=0, the contaminant only spreads in the x-y plane. Therefore, the total mass of the contaminant (1kg) is evenly distributed over a 10mx500m rectangle.

The resulting concentration is 1kg/(10m*500m)=0.002 mg/L. However, the contaminant only spreads in the x-direction, resulting in a higher concentration of 3.4 mg/L at x=500m, y=0.

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During the low pressure phase, the semilunar valves close to prevent the backflow of blood into the ventricles from the great vessels. This is the moment when the second heart sound is heard.

1. During the low pressure phase, the ventricles relax (diastole).
2. As the pressure in the ventricles drops, blood starts to flow back towards them from the great vessels (aorta and pulmonary artery).
3. To prevent the backflow of blood, the semilunar valves (aortic and pulmonary valves) close.
4. The closure of the semilunar valves produces the second heart sound, also known as the "dub" in the "lub-dub" pattern of the heartbeat.

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The elasticity and Poisson's ratio for this metal is 0.232.

What is ratio?

The realation between two numbers which shows how much bigger one quantity is than another.

Sol-

As per the given question

P=190KN

d=16 mm

Lo=50mm

X=50.1349-50=0.1349mm

Y=15.99-16=-0.01mm

The formula-

E=ó/€

Ó=P/A

A=r/4 d^2 =π/4(16)^2=201.062 mm

ó={190(1000)}201.062=944.982 Mpa

E=944.982/0.002698=350.253 GPa

€y=-0.000625

v=0.232(answer)

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Answer:

Doors, Windows & Ventilator is a part of building component which is allow to Air & light move & circulate inward & outward, with in door Human or any other material can be move inside or outside also. here types of doors & windows & ventilation are given with necessity of location, function etc.

Window ventilators are used for ensuring a supply of fresh air from the outside into the interior. They are used in rooms with natural ventilation, mechanical extract ventilation or hybrid ventilation. ... It automatically adjusts the inflow of fresh air depending on the level of relative humidity in the room.

Explanation:

According to the charge that is stored on the positive plate, the order is B, A, C, D, and E, from biggest to smallest.

The charge stored on the positive plate of a capacitor is given by Q = CV, where Q is the charge, C is the capacitance, and V is the voltage. Since the capacitors are connected in parallel, they all have the same voltage V. Therefore, the capacitor with the largest capacitance will have the largest charge stored on its positive plate.

Ranking the capacitors from largest to smallest based on their capacitances, we get:

B) A = 2 cm, C = 8 nF

A) A = 4 cm, C = 8 nF

C) A = 2 cm, C = 4 nF

D) A = 4 cm, C = 2 nF

E) A = 1 cm, C = 1 nF

Therefore, the ranking from largest to smallest based on the charge stored on the positive plate is: B, A, C, D, E.

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Answer:

The new volume is the same as the initial volume, i.e. 20 mL.

Explanation:

To find the new volume we can use the Ideal gas law:

\( PV = nRT \)

Where:

P: is the pressure

V: is the volume

R: is the gas constant

n: is the number of moles

T: is the temperature

Initially, we have:

\( \frac{P_{i}V_{i}}{T_{i}} = nR \)    (1)

In the final state:  

\( \frac{P_{f}V_{f}}{T_{f}} = nR \)    (2)

By equating equation (1) and (2) we have:          

\( \frac{P_{i}V_{i}}{T_{i}} = \frac{P_{f}V_{f}}{T_{f}} \)  

\( \frac{P_{i}V_{i}}{T_{i}} = \frac{2P_{i}V_{f}}{2T_{i}} \)  

\(V_{f} = \frac{2T_{i}*P_{i}*V_{i}}{T_{i}*2P_{i}}\)

\( V_{f} = V_{i} \)

\( V_{f} = 20.0 mL \)

Therefore, the new volume is the same as the initial volume, i.e. 20 mL.

I hope it helps you!

Answer:

Mars, Venus, Neptune, Jupiter

Explanation:

Answer:

Mars, Venus, Neptune, Jupiter.

Explanation:

If air resistance is ignored, the ball could land on the green after a flight time of 3.5s.

The vertical velocity of the ball is calculated as follows;

\(h = v_yt - \frac{1}{2} gt^2\\\\7.5 = (3.5)v_y - \frac{1}{2}(9.8)(3.5)^2\\\\ 7.5 = 3.5v_y - 60.025\\\\3.5v_y = 67.525\\\\v_y = 19.29 \ m/s\)

X = Vxt

Vx = (X)/t

Vx = (70)/3.5

Vx = 20 m/s

v = √(Vy² + Vx²)

v = √(19.29² + 20²)

v = 27.79 m/s

tanθ = (Vy)/(Vx)

tanθ = (19.29)/(20)

tanθ = 0.9645

θ = 43.96⁰

The time of flight is calculated as follows;

\(T = \frac{2u \times sin(\theta)}{g} \\\\T = \frac{2 \times 27.79 \times sin(43.96)}{9.8} \\\\T = 3.9 \ s\)

X = VxT

X = 20 x 3.9

X = 78 m

The ball will land on green which is at 70 m after 3.5s.

Thus, if air resistance is ignored, the ball could land on the green after a flight time of 3.5s.

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The correct option among the answer choice given above which reflects the use of chunking to remember items to pack for a trip is:

Making a list of items to pack organized by where each item is in your room

Option c is the correct answer

A trip simply refers to a relatively short journey. It is called traveling when there is movement from one place to another usually to a long distant location

So therefore, the correct option among the answer choice given above which reflects the use of chunking to remember items to pack for a trip is:

Making a list of items to pack organized by where each item is in your room

Option c is the correct answer

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Answer:

C

Explanation:

Answer:

A

Explanation:

More potential energy equals more kinetic

Helium and air

The Hirschfelder equation, D(air-He) = 2.22 x 10-5 cm2/s, can be used to calculate a gas-phase diffusion coefficient of air and helium.

Difussion is a crucial step in the manufacturing of some products, including semiconductors, where it is utilised to create the proper chemical composition. It involves molecules moving from a region of higher concentration to one with a lower concentration. This phenomenon, which is brought about by the random movement of molecules, occurs naturally in all systems. The process of diffusion is crucial for a variety of processes, such as the transmission of heat, the exchange among gases during respiration, and the passage of nutrients through cell.

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The stratosphere absorbs over 95% of incoming ultraviolet radiation.

The stratosphere is the second layer of the atmosphere and it is composed

of ozone layer.

The ozone layer is composed of ozone which helps to shield the earth from

the ultraviolet radiations from the sun. The absence of this layer will result

in skin burns, cancer etc .

This is why special attention is given to prevent further depletion of the

layer which will most likely cause harmful effects and threaten existence of

life on earth.

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Answer:

The stratosphere absorbs over 95% of incoming ultraviolet radiation.

The stratosphere is the second layer of the atmosphere and it is composed

of ozone layer.

The ozone layer is composed of ozone which helps to shield the earth from

the ultraviolet radiations from the sun. The absence of this layer will result

in skin burns, cancer etc .

This is why special attention is given to prevent further depletion of the

layer which will most likely cause harmful effects and threaten existence of

life on earth.

Answer:

A.) Maritime Tropical (mT)

Explanation:

Continental tropical is the air mass that forms over warm land.

Maritime Polar is the air mass that forms over cold water.

Continental polar is the air mass that forms over cold land.

So therefore A or Maritime Tropical is the correct answer

Answer:

Gobernancia. ...

Compromiso con el mercado. ...

Seguridad. ...

Infraestructura. ...

Imperio de la ley. ...

Capital humano. ...

Gestión Financiera Pública. ...

Compromiso ciudadano.

Explanation:

The modulus of elasticity, E, is a measure of a material's stiffness and ability to resist deformation when a force is applied. It is defined as the ratio of stress to strain within the elastic range of the material. In other words, it describes how much a material will stretch or compress under a given force.

The modulus of elasticity is important because it allows engineers to predict how materials will behave under different conditions, such as temperature changes, loading conditions, and other factors. It also helps to determine the maximum load a material can withstand before it starts to deform or break.

In detail, the modulus of elasticity is a fundamental property of a material that describes its ability to resist deformation when subjected to external forces. It is calculated by measuring the stress and strain of the material and using the equation E = σ/ε, where σ is stress and ε is strain.

The modulus of elasticity is important in many areas of engineering, such as structural design, materials science, and mechanics. It helps to ensure that structures and materials are designed and tested to withstand the loads and stresses they will be subjected to, and it provides a basis for comparing different materials and choosing the best one for a particular application.

In summary, the modulus of elasticity, E, is a material property that describes its stiffness and resistance to deformation. It is correctly determined using Hooke's Law and is crucial for predicting the mechanical behavior of materials when subjected to stress.

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Answer:13.6

Explanation:

Answer:

Friction is another force that energy gets "wasted" on in the dragging. Therefore, the machine gives you less mechanical advantage when too much friction is involved because it wastes energy. It also makes it less efficient!

Answer:

hydrochlorine +12÷B to the power of 4 -× y reapeated zminus 2 to the power of 9

Answer:

800\(\pi\)cm²

Explanation:

Given parameters:

radius of the coin  = 20cm

Unknown:

Surface area of the coin  = ?

Solution:

A coin is made up of two faces;

  Surface area  = 2(πr²)

Insert the parameters and solve;

     Surface area = 2(\(\pi x 20^{2}\))

    Surface area = 800\(\pi\)cm²

Given:

The mass on the table is,

The hanging mass is,

THe coefficient of friction is,

let the acceleration of the whole system is a (for the hanging mass it is downward and for the mass on the table it is rightward). the tension towards The fixed point of the pulley is T.

we can write,

Adding these equations we get,

Substituting the values we get,

Hence the acceleration is 6.66 m/s^2.

Answer:

The momentum of the falling apple is transferred to the Earth.

Explanation:

Answer:

elastic and Inelastic

Explanation:

Expansion of the universe after its origin takes place by a phenomenon called inflation.

In physical cosmology, a theory of exponential expansion of space in the early universe is called inflation.

Prior to the Big Bang, the universe underwent a breathtaking cosmic expansion, doubling in size in a fraction of a second. This rapid inflation, fueled by energy that permeated empty space and left the universe desolate and cold.

The Big Bang theory explains how the universe got from the hot dense state of the early universe to the cold dense state whereas cosmic inflation is an explanation of some properties of the cosmic microwave background radiation.

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Answer:

Explanation:

The NISP of the bones found in the park is 22. 2. The bones that belong to the axial skeleton is the 3 skulls, and the bones that belong to the appendicular skeleton are the 6 femora, 4 hip bones, 2 humerus, 2tibiaes, and 5 scapula bones.

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The current is increased by a factor of 8.

From 18/35 A. to 144/35 A.

The electric current changes from 0.514 ampere to 4.14 ampere, i.e, electric current flow in the circuit increases 8 times.

A stream of charged particles, such as electrons or ions, travelling through an electrical conductor or a vacuum is known as an electric current. The net rate of electric charge flowing through a surface or into a control volume is how it is calculated.

Initial electric current flowing through the circuit = (18 volt ÷ 35 ohms)

= 0.514 ampere.

When the initial voltage of 18 V is doubled, and the initial resistance of 35 Ohms is reduced by a factor of 4, electric current flowing through the circuit will be = (2 × 18 volt )÷ (35 ohms÷4)

= 4.114 ampere.

Hence, electric current changes from 0.514 ampere to 4.14 ampere, i.e., electric current flow in the circuit increases 8 times.

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Answer:

the growth of mycelial, by which reduction in carbohydrate level occurs in the medium. Because of this reduction in carbohydrate level

Explanation:

The distance of dodo is 150 cm.

The distance between a lens's center and its focal point is its focal length. A focal point is a location on the principal axis where, following refraction via the lens, light rays parallel to the principal axis either actually meet or appear to meet.

Given parameters:

the focal length of David's lens is: f = 50 cm.

magnification is: m = -0.50

We have to find: distance of dodo, that is, object's distance : u = ?

We know that:

u =f( 1/m -1)

⇒ u = 50(-1/0.50-1) = - 150 cm.

Hence, distance  is 150 cm.

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

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