what happens to a sound wave when it interferes with another sound wave having the same frequency but traveling in the opposite direction? a. a standing wave is generated. b. beats are produced.

Answer:

The correct option is;

-Pointing the fan exhaust upward

Explanation:

The fan cart transfers reaction force from the jet of air it blows through the exhaust into motion in the opposite direction of the jet. By pointing the fan exhaust upwards, the direction of motion of the cart is therefore, into the ground. Due to the solid nature of the ground the motion is resisted, and by Newton's first law of motion, a body will remain in motion unless resisted by a force. In the case of the question, the ground is resisting the motion of the cart and the cart will remain at rest and having zero acceleration.

To determine how many buzzing mosquitoes will produce a sound intensity equal to normal conversation, we need to use the fact that decibels follow a logarithmic scale. The difference in decibels between 40 dB (buzzing mosquito) and 50 dB (normal conversation) is 10 dB.

Since sound intensity doubles for every increase of 10 dB, we can calculate the number of mosquitoes needed to produce a sound intensity equal to normal conversation by using the following equation:10 * log(I1/I2) = 10 dB where I1 is the sound intensity of one buzzing mosquito and I2 is the sound intensity of normal conversation. Simplifying the equation, we get:
log(I1/I2) = 1I1/I2 = 10 I1 = 10 * I2
This means that the sound intensity of one buzzing mosquito is 10 times lower than that of normal conversation. Therefore, we would need 10 buzzing mosquitoes to produce a sound intensity equal to normal conversation.
So, it would take 10 buzzing mosquitoes to produce a sound intensity equal to that of normal conversation.

To know more about sound intensity equal to normal conversation click here:

brainly.com/question/18186964

#SPJ11

Answer with Explanation:

Spain is known to have hot summers, thus, it is very easy for water to evaporate once exposed to direct heat source (such as the sun).

A fountain is being used in order to keep the garden's surrounding air temperature low by allowing the evaporation of water. One factor that speeds up the evaporation of water is the surface area. The water coming out of a fountain is in small quantities; however, it meets up with hot air in a large surface area. This allows faster evaporation, leading to an even greater cooling effect because heat is being transported immediately from the liquid state to the gaseous state. This is the reason why people often meet up in places where there's a fountain. It is not only aesthetically appealing but also provides comfort from the heat.

The approximate final speed of the basketball dropped from a height of 2.12 m is 5.3 m/s.

The final speed of the basketball dropped from a height of 2.12 m can be found using the principle of energy conservation.

When the basketball is dropped, it gains potential energy due to its position at a height above the ground. As it falls, this potential energy is converted into kinetic energy, which is the energy of motion.
According to the principle of energy conservation, the total amount of energy in the system (the basketball and the Earth) remains constant. Therefore, the potential energy at the top of the drop must be equal to the kinetic energy at the bottom of the drop. The formula for potential energy is:
PE = mgh
Where m is the mass of the basketball, g is the acceleration due to gravity (9.8 m/s²), and h is the height of the drop (2.12 m). The formula for kinetic energy is:
KE = (1/2)mv²
Where m is the mass of the basketball and v is its velocity at the bottom of the drop.
Setting these two equations equal to each other, we can solve for v:
mgh = (1/2)mv²
Simplifying and solving for v, we get:
v = √(2gh)
Plugging in the values for g and h, we get:
v = √(2 × 9.8 m/s² × 2.12 m) ≈ 5.3 m/s

Hence , the approximate final speed of the basketball dropped from a height of 2.12 m is 5.3 m/s.

learn more about speed click here:

https://brainly.com/question/13943409

#SPJ11

Answer:

13108.3N

Explanation:

Given parameters:

Acceleration = 0.785m/s²

Net force  = 1050N

Unknown:

Normal force acting on car  = ?

Solution:

The normal force on this car is the weight of the car;

   Normal force  = mg

where m is the mass of the car

           g is the acceleration due to gravity = 9.8m/s²

Now solve for the mass;

             Net force  = mass x acceleration

                1050  = mass x 0.785

                 mass  = \(\frac{1050}{0.785}\)   = 1337.6kg

So,

     Normal force  = 1337.6kg x 9.8m/s² = 13108.3N

13108 works as well for acellus

To calculate the mean atomic mass, μ and He when X = 0.70, Y = 0.30, Z = 0.00, the following steps should be taken. The first step is to calculate the average atomic mass of the element.

For such more question on average

https://brainly.com/question/130657

#SPJ8

The energy transformation that is happening in this process is mechanical energy to chemical energy.

According to conservation of energy, energy can not be distroyed and cannot be created, but can only be transformed from one form to another.

The batteries of some flashlights can be charged by turning a handle. The energy transformation that is happening in this process is mechanical energy to chemical energy. The chemical energy will transform to electrical energy which will eventually transform to light energy.

The turning of the handle is mechanical and the energy in battery is chemical.

Learn more about Energy here: https://brainly.com/question/25959744

Answer: I think ions I’m not 100% sure if it’s not let me know

Explanation:

The speed of the photon has been obtained as  8.9 * 10^5 m/s.

We know that the energy of the photon would be converted to the kinetic energy of the photon s it is moving. We would now go ahead to obtain the energy in joule.

We now have;

Energy in joules = 2.30 * 1.6 * 10^-19

= 3.68  * 10^-19 J

Then we know that;

KE = 1/2mv^2

KE = kinetic energy

m = mass of the electron

v = speed of the electron

Then

v^2= 2KE/m

v = √2KE/m

v = √2 *  3.68  * 10^-19/9.11 * 10^-31

v = 8.9 * 10^5 m/s

Learn more about speed:https://brainly.com/question/3962600

#SPJ1

Answer: 55.0066 miles per hour

Explanation: i hope this helped, and pls mark me as brainliest

Although most no. 10 wire used is solid, it would be beneficial to use the stranded type when connectors will be crimped on. The correct option is a.

Stranded wire is used for the crimped connections.

Although most no. 10 wire used is solid.  The stranded type wire must be used when the connectors will be crimped on.

The screw terminal uses multicore wire whereas Direct run wire uses solid wire. The longer run uses optical wire.

Thus, the correct option is a.

Learn more about stranded wire.

https://brainly.com/question/14364127

#SPJ1

Answer: The voltage required to move a current of 2mA through a resistor with a resistance of 0.5 kΩ can be calculated using Ohm's law, which states that the voltage across a resistor is equal to the current flowing through it multiplied by the resistance:V = I * RV = 2mA * 0.5 kΩV = 1VSo, the voltage required to move 2mA through 0.5 kΩ is 1 Volt.

Answer:

base

Explanation:

I hope this helps

Answer:base

Explanation:

Answer:

  (D)  4

Explanation:

The percentage error in each of the contributors to the calculation is 1%. The maximum error in the calculation is approximately the sum of the errors of each contributor, multiplied by the number of times it is a factor in the calculation.

  density = mass/volume

  density = mass/(π(radius^2)(length))

So, mass and length are each a factor once, and radius is a factor twice. Then the total percentage error is approximately 1% +1% +2×1% = 4%.

_____

If you look at the maximum and minimum density, you find they are ...

  {0.0611718, 0.0662668} g/(mm²·cm)

The ratio of the maximum value to the mean of these values is about 1.03998. So, the maximum is 3.998% higher than the "nominal" density.

The error is about 4%.

_____

Additional comment

If you work through the details of the math, you will see that the above-described sum of error percentages is just an approximation. If you need a more exact error estimate, it is best to work with the ranges of the numbers involved, and/or their distributions.

Using numbers with uniformly distributed errors will give different results than with normally distributed errors. When such distributions are involved, you need to carefully define what you mean by a maximum error. (By definition, normal distributions extend to infinity in both directions.) While the central limit theorem tends to apply, the actual shape of the error distribution may not be precisely normal.

Answer:

Explanation:

#CARRYONLEARNING

justoko2

Index fossils are fossils that are used to help determine the relative age of rock layers and sedimentary strata. They are typically small, widely distributed organisms that lived for a relatively short period of time and are characteristic of a specific geological period. Index fossils are useful because they can help geologists and paleontologists to determine the relative age of rock formations and to understand the Earth's geological history.

It is unlikely that humans would be useful as index fossils in the future, as the time period during which humans have existed on Earth is relatively short compared to the age of the Earth as a whole. In addition, humans are not small, widely distributed organisms like many of the commonly used index fossils. Instead, humans are large, highly adapted organisms that have a wide range of habitats and are found on most of the continents.

However, it is possible that artifacts or other remains associated with human activity could be used as index fossils in the future. For example, the presence of certain types of tools or other materials might be used to help determine the relative age of a site or to understand the environmental conditions and human activity in a particular region at a specific point in time.

Hope This Helps You!

The ratio of z to h can be determined by comparing the densities of freshwater and saltwater. The density of a substance is defined as its mass per unit volume.

In this case, the density of freshwater is given as\(1.000 g/cm^3\), while the density of salt water is given as \(1.025 g/cm^3\). To find the ratio of z to h, we need to consider the relationship between density and volume. The density of a substance can be expressed as the ratio of its mass to its volume.

Let's assume z and h represent the volumes of freshwater and saltwater, respectively. Since density is constant for each type of water, we can set up the following equation:

\(1.000 g/cm^3\) (density of freshwater) = \(1.025 g/cm^3\) (density of saltwater)

By canceling out the units, we get:

\(1.000 (g/cm^3) = 1.025 (g/cm^3)\)

Since the densities are equal, we can conclude that the ratio of z to h is 1:1.

Learn more about  density here:

https://brainly.com/question/952755

#SPJ11

The given statement "A large bulk quantity is defined as 3,000 kg (6,614 lbs.) for solids and 3,000 liters (792 gallons) for liquids and gases in a single package" is true.

What is large bulk quantity?

Learn more about the Hazardous bulk with the help of the given link:

https://brainly.com/question/14311317

#SPJ4

Answer:

La presión que los patinadores ejercen sobre el hielo es 7,848,000 Pa

Explanation:

Los parámetros dados de los patinadores en la pala son;

La longitud de la hoja en el patín, l = 30 cm = 0.03 m

El espesor de la hoja, t = 5 mm = 0,005 m

El peso de las dos personas, m = 120 kg

Suponiendo que la sección transversal de la cuchilla sobre el hielo es rectangular, tenemos;

A = l × t

∴ A = 0,03 m × 0,005 m = 0,00015 m²

La fuerza de peso de los dos patinadores, W = m × g

Dónde;

g = La aceleración debida a la gravedad ≈ 9,81 m / s²

m = La masa de los dos patinadores = 120 kg

∴ W = 120 kg × 9,81 m / s² = 1,177,2 N

Presión, P = Fuerza, F/(Área, A)

∴ P = (1.177,2 N) / (0.00015 m²)= 7,848,000 Pascals

La presión que los patinadores ejercen sobre el hielo., P = 7,848,000 Pascals

Answer:

The impression of the image on the retina lasts for about 1/16th of a second after the removal of the object. If a burning stick of incense is revolved at a rate of more than sixteen revolutions per second, we see a circle of red light due to persistence of vision.

Explanation:

Acceleration = (force) / (mass)

Acceleration = (6.81 x 10⁻³ N) / (252 kg)

Acceleration = 2.70 x 10⁻⁵ m/s²

Time = (change in v) / (acceleration)

Time = (262 m/s) / (2.70 x 10⁻⁵ m/s²)

Time = 9,703,704 seconds

That's  2,695.5 hours , or  112.3 mean solar Earth days .

Answer:

Explanation:

Once water falls from the sky as precipitation:

1) It can go into a body of water and rejoin with other water molecules.

2) It can join a runoff, which is just water flowing on land.

3) It can become groundwater and fill the spaces between sediments and cracks in rock. This type of water can be used to replenish bodies of water later on.

Answer:

non of the choice are correct

Explanation:

because waves look like waves only

b)

Given that,

A=10 N at 0°

B=20 N at 180°

As we can see these two vectors are in opposite directions.

Thus the resultant vector will be in the direction of the vector with the higher magnitude.

In vector addition we can write,

Where C is the resultant vector.

Thus magnitude of R will be equal to,

The negative sign indicates that the direction of the C is along the negative x-axis.

Thus the magnitude of C is 10 N and the direction of the C is 180°

a)

Given,

A= 10 N at 0°

B=20 N at 0°

The the vector C is

The direction of R will be along the direction of these two vectors, as they are in the same direction.

Thus the magnitude of the vector C will be 30 N and the direction of the vector C is 0°

c)

Given,

A=10 N at 180°

B=20 N at 180°

Thus the vector C is

The direction of the vector C will be along the direction of the negative x-axis, as these two vectors are along the negative x-axis.

Thus the magnitude of the vector C is 30 N and the direction of the vector C is 180°

d)

Given,

A= 10 N at 0°

B=20 N at 90°

The x-component of the vector C will be,

The y- component of C will be,

The magnitude of vector C is given by,

The direction of the vector C will be,

Thus the magnitude of C will be 22.36 N and the direction of C will be 63.43°

e)

Given that

A= 10 N at 90°

B=20 N at 0°

The x-component of the vector C will be

The y-component of the vector C will be

The magnitude of the vector C will be

The direction of vector C will be,

Thus the magnitude of the vector C will be 22.36 N and the direction of the vector C will be 26.56°

Answer:

KE = 1/2 M V^2

V = (2 KE / M)^1/2 = (2 * 40 / .1)^1/2 = 28.3 m/s

Let an electron is at blue​ sphere and positive charge Q at orange sphere. The force on electron is act towards positive charge.Therefore force is along letter C direction.

Gravity's effect on each and every construction that is built is the one thing that never changes in the entire globe. Every structural designs' main goal is to make a structure stand upright. A designer will be able to include these concerns as part of a design language that will result in a substantially clearer architectural statement if they have a solid understanding of architectonics.

The idea of a force is central to this investigation. Indeed, a force is really abstract. It can be defined, but unless it encounters opposition, it won't become physically evident. Picture a six-foot-tall block of ice moving smoothly on a surface that has been laid out within a hockey rink.

Learn more about   the force

https://brainly.com/question/13191643

#SPJ4

Value analysis is a method used to evaluate the worth and effectiveness of an organization or project.

In the case of DEWA (Dubai Electricity & Water Authority), conducting a value analysis can provide insights into the overall value created by the organization. Here are some key points to consider in a value analysis of DEWA:

1. Service Quality: Evaluate the quality and reliability of the electricity and water services provided by DEWA. Assess factors such as uptime, response time, customer satisfaction, and the overall impact on the daily lives of residents and businesses in Dubai.

2. Cost Efficiency: Analyze the cost-effectiveness of DEWA's operations, including the generation, transmission, and distribution of electricity, as well as water production and distribution. Assess the efficiency of resource utilization, cost management practices, and the impact on consumer tariffs.

3. Sustainability: Evaluate DEWA's commitment to sustainable practices, such as renewable energy integration, water conservation efforts, and environmental stewardship. Assess the organization's contributions to reducing carbon emissions and promoting a greener future.

4. Innovation and Technology: Assess DEWA's adoption of innovative technologies, such as smart grids, advanced metering systems, and digital solutions. Evaluate the impact of these technologies on service delivery, efficiency, and customer experience.

5. Stakeholder Engagement: Analyze DEWA's relationships with stakeholders, including customers, suppliers, government entities, and the community. Assess the effectiveness of communication, collaboration, and the organization's contribution to social and economic development in Dubai.

By conducting a comprehensive value analysis of DEWA, stakeholders can gain a holistic understanding of the organization's performance, impact, and value proposition. This analysis can guide decision-making, identify areas for improvement, and support DEWA's ongoing efforts to provide reliable, sustainable, and affordable electricity and water services to the residents and businesses of Dubai.

Learn more about Value analysis here:

brainly.com/question/30132218

#SPJ11

In 10 moles of carbon, there is approximately 96.5 coulombs of positive electric charge.

To determine the amount of positive electric charge in 10 moles of carbon, we need to calculate the total charge based on the number of moles and the charge per mole.

Given:

Number of moles of carbon (n) = 10 moles

Avogadro's constant (NA) = 6.022 × 10^23 mol^(-1)

Elementary charge (e) = 1.60 × 10^(-19) C

The total positive electric charge (Q) can be calculated using the formula:

Q = n * NA * e

Substituting the given values, we have:

Q = 10 moles * (6.022 × 10^23 mol^(-1)) * (1.60 × 10^(-19) C)

Simplifying the calculation, we find:

Q ≈ 9.65 × 10^4 C

Rounding to one significant figure, we have:

Q ≈ 1 × 10^5 C

Therefore, there is approximately 1 × 10^5 coulombs of positive electric charge in 10 moles of carbon.

Learn more about moles of carbon here:

https://brainly.com/question/14783665

#SPJ11

The correct statement is " Negative charge flows from the smaller sphere to the larger sphere until the electric potential of each sphere is the same." The correct Option (E).

When the two spheres are connected with a conducting wire, the negative charge will flow from the smaller sphere to the larger sphere until the electric potential of each sphere is the same. This is because the electric potential at a point in space is proportional to the amount of charge present at that point and inversely proportional to the distance from the point to the center of the charged sphere.

Option (A) is not true because charge will flow due to the difference in potential between the two spheres.

Option (B) is not true because the electric field at the surface of each sphere will not necessarily be the same after charge flows.

Option (C) is not true because the electric potential at a point in space is the same for all charged conductors connected by a wire.

Option (D) is not true because the negative charge will flow from the smaller sphere to the larger sphere, not the other way around.

Therefore, The correct answer is option E.

To learn about capacitance click:

brainly.com/question/28445252

#SPJ4

Two conducting spheres of different radii with each negative charge connected with a conducting wire, Negative charges flow from the smaller sphere to the larger sphere until the potential becomes the same. Thus, option E is correct.

The potential V = kQ / r,  Potential and charge are directly proportional to each other, more potential gives more negative charge. More negative charge gives lower potential. The potential always flows from a lower to a higher potential. Thus the negative charge flows from the smaller sphere to the larger sphere to equal the potential.

Thus, the correct option is E.

Learn more about the Electric potential :

https://brainly.com/question/30629127

#SPJ4