Give an example of how a scientist might use a graph of the
relationship between population growth and time to identify
a trend.


HELP FAST PLEASE!!!!!!

Answer:

C. Light does not need a medium to travel through, but since sound waves must have a medium to vibrate, sound is not created where no air is present.

Explanation:

The reason the bell is seen to vibrate but not heard is that unlike light, which does not require a medium to pass through, sound waves require an air-filled space in order to vibrate. Option C is correct.

A sound wave is produced when a medium begins to vibrate. When an entity vibrates, a pressure wave is formed, which causes sound.

Light does not need a medium to travel through, but since sound waves must have a medium to vibrate, the sound is not created where no air is present best describes why the bell is seen vibrating but not heard.

The complete question is attached.

Hence option C is correct.

To learn more about the sound wave, refer to

https://brainly.com/question/11797560

#SPJ2

We are asked for the x coordinate of vertex

Here vertex is present somehow at 850-870nm

The most applicible answer should be 860nm

Option C is correct

Answer i would use a magnent first to take out the iron then boil the salt and sand mixture until the salt dissolves and its just sand left

Explanation:

Answer:

Suppose at time t1 = zero and v1 = 50 MPH

                    time t2 = 10 sec and v2 = 10 MPH

Change in speed   =  (v2 - v1) / (t2 - t1) = (10 - 50) MPH / (10 - 0) sec

Change in speed = -40 MPH / 10 sec = - 4 MPH / sec

If you specify the velocity as always East then

change in velocity = - 4 MPH East

Had the particle finished by moving in the Westerly direction  then

Change in velocity = (-10 - 50) MPH / 10 sec = -60 / 10 MPH = -60 MPH East

Where West was the positive direction

Initially v1 was 50 East and v2 was -10 East with a difference of 60 MPH

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

Answer:

The minimum amount that the spring must be compressed if the roller coaster car is to stay on the track is 2.87 meters.

Explanation:

The energy required at the top of the roller coaster loop can be determined by considering the energy of the car, which must be supplied at launch by the giant spring.

The car has potential energy due to its height at the top of the track. It has kinetic energy due to its tangential velocity. In order for the car to stay on the track, the tangential velocity must make the required centripetal acceleration equal to the acceleration due to gravity. Where v is the linear velocity and r is the track radius, the relation to gravity is ...

  g = v²/r   ⇒   v² = rg

Then the kinetic energy at the top of the track is ...

  KE(top) = 1/2mv² = 1/2mrg

And the potential energy at the top of the track is ...

  PE(top) = mgh = 2mgr . . . . . where h is the height of the car, twice the radius

The total energy of the car at the top of the track is then ...

  KE(top) +PE(top) = 1/2mrg +2mrg = 5/2mrg

At the bottom of the track, the energy supplied by the compressed spring will be ...

  PE = 1/2kx² . . . . . where k is the spring constant, and x is the amount of compression

For the spring to supply the necessary total energy, we must have ...

  1/2kx² = 5/2mrg

  x² = (5mrg)/k = 5·(840 kg)(6.2 m)(9.8 m/s²)/(31000 N/m) = 8.232 m²

  x = √8.232 m ≈ 2.87 m

The minimum amount that the spring must be compressed if the car is to stay on the track is 2.87 meters.

__

Additional comment

The velocity of the car at launch is about 17.43 m/s. Its kinetic energy is about 128 kJ. About 102 kJ of that is converted to potential energy at the top of the track, where the velocity slows to about 7.79 m/s.

Answer:

C

Explanation:

The potential energy of two point charges when they are twice as far apart will be 1/4U.

The potential energy between two point charges depends on the distance between them. The relationship between potential energy (U) and distance (d) is given by the equation:

U ∝ 1/d

This means that as the distance between the charges increases, the potential energy decreases.

In the given scenario, if the charges are initially a distance d apart and the potential energy is U, and then they are moved to a distance 2d apart, we can determine the new potential energy.

Since the potential energy is inversely proportional to the distance, doubling the distance will result in a quarter (1/4) of the initial potential energy. Therefore, the potential energy when the charges are twice as far apart is U/4.

Hence, the correct option is U/4.

learn more about potential energy

https://brainly.com/question/13548111

#SPJ11

the complete question is:

If the electrical potential energy of two point charges is U when they are a distance d apart, their potential energy when they are twice as far apart will be U/4. U/2. U 2U. 4U

Answer:

Explanation:

Step one:

given

mass m= 24kg

distance moved= 6m

time taken= 4seconds

Step two:

Required

power

but work done is the force applied at a distance, and the power is the work done time the time taken

Work done= F*D

F=mg

W= mg*D

W=24*9.81*6

W=1412.6J

Power P= work * time

P=1412.6*4

p=5650.5W

P=5.6kW

Answer:

-They will be available for many years.

Explanation:

The advantage of using renewable resources is that they will be available for many years.

Renewable resources have very fast turn over time for replenishing, therefore, they are available over an extended period time.

They are not used by consumption and so they will continually be available. This is different from the non-renewable resources which are depleted as they are being used up.

Examples of renewable resources are wind, water and air

The observation that a substance retains its volume and shape when placed in different containers indicates that the substance has a fixed volume and shape, which is a characteristic of a solid.

Solids have a fixed shape and volume because the particles that make up a solid are packed tightly together and held in a fixed position by intermolecular forces. As a result, solids maintain their shape and volume even when placed in different containers or when subject to external forces.

In contrast, liquids do not have a fixed shape, but rather take on the shape of their container. They do, however, have a fixed volume. This means that a liquid would change its shape to match the shape of its container, but its volume would remain constant.

Gases, on the other hand, do not have a fixed shape or volume. They take on the shape and volume of their container and are highly compressible.

Based on the observation that the substance retains its volume and shape when placed in different containers, it is most likely in a solid state. However, further testing may be needed to confirm this, as some liquids and even some gases can also exhibit a degree of fixed volume and shape under certain conditions.

For more such question on volume visit:

https://brainly.com/question/76841

#SPJ11

Answer:

858375 N of force is exerted on the pile driver by the beam.

Explanation:

mass of the pile driver m = 2100 kg

distance of fall = 5 m

distance through which the beam is driven = 12 cm = 0.12 m

weight of the pile driver = mg

where g = acceleration due to gravity = 9.81 m/s^2

weight of pile driver = 2100 x 9.81 = 20601 N

work done by gravity in bringing the pile driver done the 5 m height is

work = weight x distance = 20601 x 5 = 103005 J

This work by gravity is also used to do work in driving the beam into the 12 cm depth.

The force exerted by the beam on the pile driver will be proportional to the force used to do the work in driving the beam through the 12 cm depth.

equating the works, we have

103005 = F x 0.12

F = 103005/0.12 = 858375 N of force

The correct statement regarding an object dropped from a height of 10m is that, at any point during the fall, neither the velocity nor acceleration depends on the mass of the object. Option 1 is correct.

When an object is dropped from a height of 10m, it falls freely under the influence of gravity. According to the laws of motion, the acceleration due to gravity is constant and is equal to 9.81 m/s^2. This means that the object's velocity changes by the same amount every second, regardless of its mass. Moreover, since the acceleration of the object is due to the gravitational force acting on it, it is independent of the object's mass.

Therefore, both the velocity and acceleration of the object during its fall do not depend on the mass of the object. This principle is known as the equivalence principle and is a fundamental concept in physics. It states that in a gravitational field, the effects of gravity are indistinguishable from the effects of acceleration. Therefore, the mass of an object has no influence on its motion under gravity, and both the velocity and acceleration are independent of the object's mass. Option 1 is correct.

To know more about the Object, here

https://brainly.com/question/30714190

#SPJ4

When it is a passenger vehicle carrying passengers means that for standard passenger cars, a mirror on both the left and right sides isn't mandatory solely for visibility reasons. Therefore option C is correct.

This is because passenger vehicles typically have an inside rear-view mirror that allows the driver to view the rear area. However, larger vehicles (like buses or trucks) require extra mirrors due to their larger blind spots.

Motorcycles and scooters also need specific mirrors due to their compact size and potential for reduced visibility.

While having side mirrors enhances safety, regulations acknowledge that certain vehicle types can rely on other mirror arrangements without compromising visibility for passengers.

Therefore option C is correct.

Know more about visibility reasons:

https://brainly.com/question/31842875

#SPJ12

Your question is incomplete, but most probably your full question was.

In which cases is a mirror not required on both the left and right sides of the vehicle for visibility reasons?

A. When it is a commercial vehicle transporting goods.

B. When it is a large vehicle like a bus or truck.

C. When it is a passenger vehicle carrying passengers.

D. When it is a motorcycle or scooter.

Generally, mirrors are required on both sides of a vehicle for visibility, legal, and safety reasons. However, exceptions can apply in cases where vehicle design provides adequate rear visibility without a mirror or when periscopes, corner reflectors, or security mirrors are used.

In most situations, for safety and legality reasons, vehicles are required to have mirrors on both the left and right sides. However, exceptions can sometimes apply. For instance, if the vehicle is designed in a way that the driver has an unobstructed view of the rear without needing a right-side mirror, a mirror may not be necessary on the right side. In addition, in vehicles with periscopes or corner reflectors like submariners, mirrors might not be required because their increased field of vision adequately substitutes for a side mirror.

Another case where a mirror might not be required on both sides of the vehicle could be when security mirrors are installed, which are often convex and provide a larger field of view. As a result, they can cover both the left and right views, eliminating the need for distinct left and right mirrors.

https://brainly.com/question/34690886

#SPJ12

Generally, mirrors are required on both sides of a vehicle for visibility, legal, and safety reasons. However, exceptions can apply in cases where vehicle design provides adequate rear visibility without a mirror or when periscopes, corner reflectors, or security mirrors are used.

In most situations, for safety and legality reasons, vehicles are required to have mirrors on both the left and right sides. However, exceptions can sometimes apply. For instance, if the vehicle is designed in a way that the driver has an unobstructed view of the rear without needing a right-side mirror, a mirror may not be necessary on the right side. In addition, in vehicles with periscopes or corner reflectors like submariners, mirrors might not be required because their increased field of vision adequately substitutes for a side mirror.

Another case where a mirror might not be required on both sides of the vehicle could be when security mirrors are installed, which are often convex and provide a larger field of view. As a result, they can cover both the left and right views, eliminating the need for distinct left and right mirrors.

https://brainly.com/question/34690886

#SPJ12

Answer:

the answer to the first one is B and the second one is c I hope I got them right

Explanation:

A compass needle acts as a Magnet

Answer:

C) 8

Explanation:

number of atoms for C = 2 × 2 = 4

number of atoms for H = 2 × 2 = 4

4 + 4 = 8

The three factors that will influence the kind of encounter a rider has are speed, acceleration, and the strength of the wind that day, among other things. Speed, acceleration, and the strength of the wind that is present are 3 elements that will impact the kind of ride a cyclist has.

Thus, only force generated upon the bicyclists seem to be the gravity pull and also the air resistance (the force of a seat forcing up here on rider). While the normal force is always pointed perpendicular to the automobile seat, the gravitational pull is always downward.

The power that propels the cars along coaster track is felt by the passenger. The energy and the marble were guided by the track. According to Newton's third rule of motion, "There is an opposite and equal response to every action." The student's roller was so affected by it.

To know more about acceleration visit:

https://brainly.com/question/12550364

#SPJ1

Answer:

https://medlineplus.gov/spanish/healthrisksofaninactivelifestyle.html

Explanation:

Cuando usted tiene un estilo de vida inactivo:

   Quema menos calorías. Esto hace que usted tenga más probabilidades de subir de peso

   Puede perder masa muscular y resistencia, porque no usa tanto sus músculos

   Los huesos se debilitan y pierden algo de su contenido mineral

   Su metabolismo puede verse afectado y su cuerpo puede tener más problemas para sintetizar grasas y azúcares

   Su sistema inmunitario quizás no funcione tan bien

   Puede tener una mala circulación de la sangre

   Su cuerpo puede tener más inflamación

   Puede desarrollar un desequilibrio hormonal

Cuando usted tiene un estilo de vida inactivo:

   Quema menos calorías. Esto hace que usted tenga más probabilidades de subir de peso

   Puede perder masa muscular y resistencia, porque no usa tanto sus músculos

   Los huesos se debilitan y pierden algo de su contenido mineral

   Su metabolismo puede verse afectado y su cuerpo puede tener más problemas para sintetizar grasas y azúcares

   Su sistema inmunitario quizás no funcione tan bien

   Puede tener una mala circulación de la sangre

   Su cuerpo puede tener más inflamación

   Puede desarrollar un desequilibrio hormonal

The unit most electric companies bill in is kilowatt-hours.

The kilowatt-hour (abbreviated kWh) is an energy unit equal to one kilowatt (1 kW) of power expended for one hour (1 h). The kilowatt-hour is not an official unit of measurement, but it is widely used in electrical applications.

An energy expenditure of 1 kWh represents 3,600,000 joules (3.600x10^6J)

Kilowatt hours (kWh) are the primary units used to quantify electrical power usage; they are what appear on your electricity bill. Because kWh is a measurement of absolute power consumed over time, this unit is used to monitor your usage rather than kilowatts alone. A kilowatt-hour of energy is one kilowatt of power over one hour.

The unit most electric companies bill in is kilowatt-hours.

To know more about kilowatt hour, check out:

https://brainly.com/question/14149152

#SPJ4

Answer:

Negative ion

.................

Answer:

Check the diagram from the photo

Explanation:

Answer:

P = 5880  J

Explanation:

Given that,

The mass of the block, m = 30 kg

The block is sitting at a height of 20 m.

The block will have gravitational potential energy. The formula for gravitational potential energy is given by :

\(P=mgh\\\\=30\times 9.8\times 20\\\\=5880\ J\)

So, the required potential energy is equal to 5880  J.

Answer:

The person can jump 48 m on the Moon

Explanation:

The question parameters are;

The maximum long jump distance of a person on Earth, \(R_{max}\) = 3 m

The acceleration due to gravity on the Moon = 1 ÷ 16 of that on Earth

The distance the person can jump on the Moon is given as follows;

A person performing a jump across an horizontal distance on Earth (under gravitational force) follows the path of the motion of a projectile

The horizontal range, \(R_{max}\), of a projectile motion is found by using the following formula

\(R_{max} = \dfrac{u^2}{g}\)

Where;

g = The acceleration due to gravity = 9.8 m/s²

Therefore, we have;

\(R_{max} = 3 \, m = \dfrac{u^2}{9.8 \, m/s^2 }\)

u² = 3 m × 9.8 m/s² = 29.4 m²/s²

Therefore, on the Moon, we have;

The acceleration due to gravity on the Moon, \(g_{Moon}\) = 1/16 × g

∴ \(g_{Moon}\) = 1/16 × g = 1/16 × 9.8 m/s² ≈ 0.6125 m/s²

\(R_{max \ Moon} = \dfrac{u^2}{g_{Moon}} = \dfrac{29.4 \ m^2/s^2}{0.6125 \, m/s^2 } \approx 48 \, m\)

The maximum distance the person can jump on the Moon with the same velocity which was used on Earth is \(R_{max \ Moon}\) ≈ 48 m

Given equation

\(\\ \sf\longmapsto N_2+3H_2\longrightarrow 2NH_3\)

Nitrogen on product side:-

\(\\ \sf\longmapsto 2(1)=2\)

Hydrogen on reactant side:-

\(\\ \sf\longmapsto 3(2)=6\)

According to the question,

The Equation is

\( \sf \: N_2 + 3H_2 \: \longrightarrow2NH_3\)

Let's balance the equation (Excluded)

\(\sf \longmapsto \: N_2 + 3 H_2 = 2 NH_3\)

Hydrogen atoms on product side:

\(\sf \longmapsto2 \times 1\)

\(\sf \longmapsto \: 2\)

Nitrogen atoms on the reactant side:

\(\sf \longmapsto \: 3 \times 2\)

\(\sf \longmapsto \: 6\)

There fore,

Product side

\( \sf \: 2\)

Reactant side

\( \sf6\)

Answer:

\(\huge\boxed{\sf Speed = 2 \ m/s}\)

Explanation:

Given:

Time = t = 45 seconds

Distance = S = 90 meters

Required:

Speed = v = ?

Formula:

v = S / t

Solution:

v = 90 / 45

Speed = 2 m/s

\(\rule[225]{225}{2}\)

Hope this helped!

The hippo's center of gravity is located 3.2 meters from its tail.

To determine the distance of the hippo's center of gravity from its tail, we need to consider the weight distribution between its front and rear feet. Given that the hippo carries 80% of its weight on its front foot, we can assume that 80% of the hippo's total weight acts at the front. Let's denote the distance from the tail to the center of gravity as "x."

Since the rear foot is located at the tail, the remaining 20% of the weight acts at the rear foot. Using the principle of moments, we can set up the equation: (80% of the weight) * (distance from front foot to center of gravity) = (20% of the weight) * (distance from rear foot to center of gravity). Plugging in the given values, we have (0.8) * (4.0 - x) = (0.2) * x. Solving this equation, we find x = 3.2 meters. Therefore, the hippo's center of gravity is located 3.2 meters from its tail.

To learn more about center of gravity click here:

brainly.com/question/20662235

#SPJ11