One hot water pump has a noise rating of 74 decibels. A rock concert, has a noise rating of 116 decibels. The rock concert noise is how many times more intense than the hot water pump noise

Answer:

The thermal transfers via "Conduction and Radiation"

Explanation:

Because, Convection is the transfer of thermal energy by particles moving through a fluid. Thermal energy is always transferred from an area with a higher temperature to an area with a lower temperature.

Moving particles transfers the thermal energy through a fluid by forming convection currents.

It transfers ( thermal ) heat energy to a food's surface via convection and radiation. So that, the heat energy on the food's surface, then it spreads via "conduction" towards the food's center.

The mass attenuation coefficient is a measure of the probability of a photon interacting with a material as it passes through it. It is represented by the symbol μ/ρ, where μ is the linear attenuation coefficient and ρ is the density of the material.

To find the ratio of mass attenuation coefficients of soft and hard X-ray radiation after passing through bone tissue, we need to compare the values of μ/ρ for both types of radiation at the given photon energies. According to NIST's X-Ray Mass Attenuation Coefficients Database, at a photon energy of 30 keV, the mass attenuation coefficient for bone tissue is 0.95 \(cm^{2}\)/g for soft x-rays. At a photon energy of 120 keV, the mass attenuation coefficient for bone tissue is 0.18 \(cm^{2}\)/g for hard x-rays. Therefore, the ratio of the mass attenuation coefficients of soft and hard x-ray radiation after passing through bone tissue is: 0.95 \(cm^{2}\)/g / 0.18 \(cm^{2}\)/g = 5.28. In other words, the mass attenuation coefficient for soft x-rays is about 5 times higher than that for hard x-rays when passing through bone tissue. This means that soft x-rays are more likely to be absorbed or scattered by bone tissue than hard x-rays, which has implications for imaging techniques that use x-rays, such as radiography and computed tomography (CT).

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Answer:

43,919.66 Kilotones de Co2 en 2016.

Explicación:

Ecuador produce 43,919.66 Kilotones de Co2 en 2016. Las tierras húmedas son muy importantes para la biodiversidad porque proporcionan hábitat a millones de animales. Alrededor del 35 por ciento de todas las especies amenazadas y en peligro vive en estas tierras húmedas. Estas tierras húmedas son altamente productivas y tienen la capacidad de mejorar la calidad del agua, prevenir la degradación del suelo y proporcionar alimentos a los animales que viven en estas tierras húmedas.

Answer:

D

Explanation:

as you can see D may be the answer because the force is being applied strongly to the right side rather then left and moving at constant speed

The speed of the three coupled cars after the collision is 1.8m/s.

The mass of the railroad car is given to be 2 x 10⁴ kg and moving with 3m/s speed.

The railroad car collides and coupled with to coupled railroad cars that has the same mass as that of a single car and they are moving in the same direction with a speed of 1.2m/s.

As we know that the linear momentum will be conserved, so, we can write,

Initial Momentum = final momentum

(2 x 10⁴ x 3) + (2 x 2 x 10⁴ x 1.2) = (3 x 2 x 10⁴)V

V is the final speed of the coupled railroad cars.

V = 5.4/3

V = 1.8 m/s

So, the speed of the coupled railroad cars is 1.8m/s.

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Answer:

B,A,A

Explanation:

Answer:

Other guy is correct b,a,a

Explanation:

Answer:

D

Explanation:

just did the quiz :)

Answer:

False

Explanation:

that is cohesion. adhesion is force between dissimilar molecules of a body

Answer:

I need more information to answer this question. Like what is the acorns mass?

Explanation:

In a parallel circuit, each resistor is connected to the same voltage source and has its own path for the current to flow. As more resistors are added to the circuit, the total amount of current flowing through the circuit increases.

This is because the total resistance of the circuit decreases, as each added resistor provides an additional path for the current to flow.

According to Ohm's law, the current in a circuit is directly proportional to the voltage and inversely proportional to the total resistance. As the total resistance of the parallel circuit decreases, the current flowing through the circuit increases. This results in a decrease in the equivalent resistance of the circuit, which is the total resistance seen by the voltage source.

Additionally, the addition of more resistors in parallel increases the overall conductance of the circuit. Conductance is the reciprocal of resistance, so as the conductance of the circuit increases, the resistance decreases. This further contributes to the decrease in equivalent resistance as more resistors are added to a parallel circuit.

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Refraction occurs when the speed of the wave changes as it moves from one medium to another.

This causes the direction of the wave to change as it enters the new medium. Refraction can also occur if there is a gradual change in the density of the medium through which the wave is passing.
The intensity transmission coefficient is the ratio of the intensity of the transmitted wave to the intensity of the incident wave. Since the sound wave is totally reflected, none of the wave energy is transmitted, so the intensity transmission coefficient is zero.
If two media have the same propagation speed and the sound beam strikes the boundary at a 50-degree angle, then the sound wave will be reflected back into the original medium at the same angle.

When a sound wave strikes a boundary between two media, some of the wave energy is reflected back into the original medium, while the rest is transmitted into the second medium. The amount of reflection and transmission depends on the angle of incidence and the difference in impedance between the two media. If the angle of incidence is greater than the critical angle, then total internal reflection will occur, and no energy will be transmitted into the second medium.
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Answer:

solids

Explanation:

Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air

Answer:

Two or more capacitors are said to be connected in parallel if each one of them is connected across the same two points. In a parallel combination of capacitors potential difference across each capacitor is same but each capacitor will store different charge.

After 1 day has passed, approximately 6.25% of Element Z would be remaining.

The half-life of an element is the time it takes for half of the initial amount of the element to decay or transform into another element or isotopes. In this case, Element Z has a half-life of 5 hours.

To determine the percentage of Element Z remaining after 1 day (24 hours), we need to calculate the number of half-lives that have occurred.

Since the half-life of Element Z is 5 hours, there are 24 hours divided by 5 hours, which equals 4.8 half-lives.

Each half-life reduces the amount of Element Z by half. So, after 4.8 half-lives, the remaining amount of Element Z would be (1/2)^(4.8) = approximately 0.0625 or 6.25%.

Therefore, after 1 day has passed, approximately 6.25% of Element Z would be remaining.

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Potential energy is changed into potential energy as the asteroid moves from a high height to a lower one.

When the meteorite strikes the lunar surface, its speed is roughly 1,449.9 m/s.

Energy in kinetic and potential form is;

We obtain the following using the energy conservation equation:

\(-\frac{G.M.m}{R+h} +\frac{1}{2} .m.v^{2} =-\frac{G.M.m}{R} +\frac{1}{2} .m.v_{2} ^{2}\)

G = Universal gravitation constant = 6.67408× 10⁻¹¹ m³/(kg·s²)

M = Mass of the Moon = 7.34767309 × 10²² kg

m = Mass of the asteroid = 100 kg

R = Radius of the Moon = 1,737.400 meters

\(\frac{G.M.m}{R+h}- \frac{G.M.m}{R} +\frac{1}{2} .m.v^{2} =-+\frac{1}{2} .m.v_{2} ^{2}\)

\(G.M.m.(\frac{1}{R}-\frac{1}{R+h}) +\frac{1}{2} .m.v^{2} =+\frac{1}{2} .m.v_{2} ^{2}\)

\(G.M.(\frac{1}{R}-\frac{1}{R+h}) +\frac{1}{2} .m.v_{1} ^{2} =+\frac{1}{2} .m.v_{2} ^{2}\)

Plugging in the values gives;

=1051105.6191=1/2.v2

v₂² = 2× 1051105.6191 = 2102211.2382

v₂ = √(2102211.2382) ≈ 1,449.9

The speed of the meteorite when it impacts the lunar surface, v₂ ≈ 1,449.9 m/s

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Using mirror's equation, The smallest diameter mirror in which the observer can just see the reflected edge of the coin is 6 cm.

We must compute the size of the mirror's produced image in order to identify the lowest diameter mirror that would allow the spectator to just view the coin's reflected edge.

We must first determine how far the picture is from the mirror. In order to compute this, use the mirror equation:

\(\frac{1}{f} = \frac{1}{d} + \frac{1}{d'}\)

where f is the mirror's focal length, d and d' are the object's and image's distances from the mirror, respectively.

Since the mirror is flat, the focal length is determined by dividing the radius in half. Therefore, we may apply the formula:

\(f = \frac{R}{2}\)

This results from substituting it into the mirror equation:

\(\frac{2}{R} = \frac{1}{3} + \frac{1}{d'}\)

Calculating d':

\(d' = \frac{3R}{ (R-6) (R-6)}\)

The mirror's diameter, D, is equal to 2R. As a result, the minimal diameter of the mirror, at which the spectator can only see the coin's edge reflected, can be calculated as follows:

\(D = 2R = \frac{2d' (R - 6)}{ 3}\)

d' = 9, thus we can condense it to:

D = 18 / 3 = 6 cm

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The statement that is false in this situation is that the fact that the bands are multicolored indicates that the film has non-uniform thickness. In reality,

the multicolored bands on the surface of the gasoline are a result of thin-film interference, which occurs when light waves reflect off the top and bottom surfaces of a thin film.

The thickness of the film affects the way the light waves interfere with each other, leading to the appearance of colored bands. However, the colors do not indicate non-uniform thickness,

but rather the thickness of the film at each point on the surface. The other statements are all true. The wavelength that is important for thin-film interference is the wavelength within the film,

which is determined by multiplying the index of refraction and the vacuum wavelength. When light travels through a material with a smaller refractive index toward a material with a larger refractive index,

reflection at the boundary occurs along with a phase change that is equivalent to one-half of a wavelength in the film. When light travels from a larger toward a smaller refractive index,

there is no phase change upon reflection at the boundary.

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The displacement from Rhonda's car to her campsite 257 m, 34.4° north of west.

Most campgrounds have picnic tables, a place to park your car, and a place to pitch your tent. Bathrooms and taps are often shared. One of the joys of camping is the lack of outdoor gear. But it's also nice to have a comfortable, convenient and cozy campsite. A tent is a small shelter for sleeping while camping.

Camps are areas with tents campfires and surroundings. There are many types of camping but the main methods of camping are backpacking auto-camping and glamping. These top three camping styles have options for every level of camper. Front country camping is also called auto camping because you can drive to the campground. These campsites usually have running water and modern washrooms.

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The electric field and potential due to a uniformly charged coaxial cable can be calculated using the appropriate formulas, taking into account the radial distance from the axis and the region in which the calculation is being performed.

a) The electric field magnitude at any point between the cylinders a distance r from the axis can be calculated using the formula for the electric field due to a uniformly charged infinite cylindrical conductor:

E = (λ / 2πε0) * (r / (b^2 - a^2))

where λ is the linear charge density, ε0 is the vacuum permittivity, and r is the radial distance from the axis.

b) The direction of the electric field at any point between the cylinders a distance r from the axis is radial, directed away from the axis for r > a and towards the axis for r < a.

c) The electric field magnitude at any point outside the outer cylinder a distance r from the axis can be calculated using Coulomb's law:

E = (λ / (4πε0)) * (1 / r)

d) The direction of the electric field at any point outside the outer cylinder a distance r from the axis is radial, directed away from the positive charge and towards the negative charge.

e) The electric potential in the region r > c can be calculated using the formula for the electric potential due to an infinitely long uniformly charged cylindrical conductor:

V = (λ / (2ε0)) * ln(r / b)

where ln is the natural logarithm.

f) The electric potential in the region b < r < a can be calculated using the formula for the electric potential difference between two concentric cylindrical conductors:

V = (λ / (2ε0)) * ln(b / a)

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Answer:

Explanation:

Water waves are generally a transverse wave which do not cause permanent displacement of molecules of the medium. Transverse waves are waves in which the direction of propagation of the wave is perpendicular to the direction of vibration of the particles of the medium.

As the wave propagates from one point to another on the surface of water transferring energy, a molecule of water on its surface vibrates upwards and downwards. Its motion is perpendicular to the direction of propagation of the wave. After the vibration, it comes back to its initial position.

The correct option is  a.438 kW. Adiabatic compression is a thermodynamic process where the compression is done so quickly that no heat exchange takes place between the system and surroundings.  In order to calculate the power input to the compressor, the work done during the adiabatic compression of water vapor must be determined.

The work done is equal to the change in enthalpy, ΔH. The mass flow rate of the water vapor is 4680 kg/h. The enthalpy at point 1 is 3414 kJ/kg, while the enthalpy at point 2 is 4136 kJ/kg. At a pressure of 200 kPa and a temperature of 150 °C, the enthalpy of water vapor is 3414 kJ/kg, according to the steam table.

The power input to the compressor can be determined by dividing the work done by the time required to do it.P = W / tThe mass flow rate of water vapor is 4680 kg/h, which is equivalent to 1.3 kg/s.  3395520 J/s ÷ 1.3 kg/s = 2611963.08 J/kg. Therefore, the power input to the compressor is 2611963.08 J/kg or 2611.96 kW.

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The stereo's current is roughly 2.15 A.

The resistance of the wire that makes up the toaster's heating element is roughly 8.70.

Ohm's law can be used to determine the current in the stereo:

I = V / R

where V is the potential difference, I is the current, and R is the resistance.

By entering the specified values, we obtain:

I = 140 V / 65 Ω ≈ 2.15 A

As a result, the stereo's current is roughly 2.15 A.

The following is the power equation in terms of voltage and resistance:

P = V² / R

P stands for power, V for voltage, and R for resistance.

By entering the specified values, we obtain:

1150 W = (100 V)² / R

When we rewrite the equation, we obtain:

R = (100 V)² / 1150 W ≈ 8.70 Ω

As a result, the resistance of the wire that makes up the toaster's heating element is roughly 8.70.

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e. The closest planets to the Sun should be rocky, and we do indeed see them there.

The nebular theory, however, states that a clouds will rotate quickly once it becomes relatively tiny.

The nebular theory proposes that a rotating cloud of material called a nebula, composed primarily of light components, flattened into the a protoplanetary disk and developed into a solar system made up of a star and circling planets.

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The closest planets to the sun should be ice, and we do indeed see icy worlds. The relationship between the nebular hypothesis of the solar system's creation is described in those sentences.

The planetary Venus, Mercury, Earth, Mars, Planets, Jupiter, Saturn, and Neptune are all part of our solar system, as are dozens of moons, hundreds of meteors, meteorites, and gaseous planets, as well as Pluto, a dwarf planet.

The Solar System is the only system in which a habitable planet has been observed, the one and only star mankind can observe up close, and the only planets we can explore with spacecraft. Research into the solar system is crucial for comprehending the evolution of planetary.

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Surveying every 10th person who enters a mall about their favorite type of cookie.

The pressure exerted by a box on the ground can be calculated by dividing the force exerted by the box on the ground by the area of the base of the box.

The force exerted by the box can be calculated using Newton's second law, which states that force (F) is equal to the mass (m) of an object multiplied by its acceleration (a). In this case, the mass of the box is given as 40 kg. Since the box is at rest on the ground, the acceleration is 0. Therefore, the force exerted by the box is 0 N.

To calculate pressure, we need to convert the force from newtons to kilogram-force. Since 1 kg-f = 10 N, the force can be expressed as 0 N / 10 = 0 kg-f.

The pressure exerted by the box on the ground is calculated by dividing the force by the area of the base of the box. The area is given as 10 m^2. Therefore, the pressure exerted by the box on the ground is 0 kg-f / 10 m^2 = 0 kg-f/m^2.

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Speed=

\(33m {s}^{ -1} \)

Distance=

\(163m\)

speed= distance/time

So,

Time= distance/speed

Time= 163/33

\(\huge\underline\mathtt\colorbox{cyan}{4.9393s}\)