A 0.05 kg ball moving at 25 m/s

Answer: B 3.0

Explanation:

The cost to run each lightbulb for a month is,

Incandescent bulb: $6.57

CFL bulb: $1.64

LED bulb: $0.88

To calculate the cost to run each lightbulb for a month, we need to first calculate the energy consumption of each bulb in kWh (kilowatt-hours).

Energy (kWh) = Power (W) x Time (h) / 1000

Using this formula,

For the Incandescent bulb: Energy (kWh) = 60 W x 730.5 h / 1000 = 43.83 kWh

For the CFL bulb: Energy (kWh) = 15 W x 730.5 h / 1000 = 10.96 kWh

For the LED bulb: Energy (kWh) = 8 W x 730.5 h / 1000 = 5.84 kWh

Now, we can calculate the cost for each bulb using the formula

Cost = Energy (kWh) x Cost per kWh

Cost per kWh = $0.15

Using this formula,

For the Incandescent bulb: Cost = 43.83 kWh x $0.15/kWh = $6.57

For the CFL bulb: Cost = 10.96 kWh x $0.15/kWh = $1.64

For the LED bulb: Cost = 5.84 kWh x $0.15/kWh = $0.88

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--The complete question is, The wattage for three different types of lightbulbs is Incandescent bulb: 60W, CFL bulb: 15W, LED bulb: 8W. In the course of a month, each lightbulb is on for 730.5 hours. The electric company charges $0.15/kWh. Calculate the cost to run each lightbulb for a month. Round to the nearest cent.

Incandescent bulb: $_

CFL bulb: $_

LED bulb: $_--

Titanium is a non-magnetic metal because of its digital configuration and crystal shape.

In its pure shape, titanium has a hexagonal near-packed (hcp) crystal structure, this means that that its atoms are organized in a specific pattern in the crystal lattice.

This association outcomes inside the absence of unpaired electrons that could create magnetic moments, making it non-magnetic. Moreover, the electron configuration of titanium does not permit for magnetic moments to shape.

Titanium has four valence electrons, which are positioned within the 3-d and 4s orbitals.

The electrons in the 3d orbital are paired, which means that they've opposite spins and cancel out any magnetic second that could be created by means of the electrons inside the 4s orbital.

But, whilst titanium is alloyed with other metals, inclusive of iron or nickel, it may turn out to be magnetic because of the magnetic houses of these metals.

This belongings is utilized in various programs, inclusive of in the manufacturing of plane and medical implants, where the non-magnetic houses of titanium are important to keep away from interference with electromagnetic gadgets.

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Answer:

So, the power done is 196 watts.

Explanation:

Energy is NEVER destroyed making this an interesting topic. In reality this energy is just isolated from that system and just changes states. You could do anything for your story, just make sure to include those points.

Hope this helped :)

Answer:

Mass = 64,870,000,000 kilograms

Explanation:

Given the following data;

Density = 998 kg/m³

Volume = 6,500,000 m³

To find the mass of water in the reservoir;

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the equation;

Density = mass/volume

Making mass the subject of formula, we have;

Mass = density * volume

Mass = 998 * 6,500,000

Mass = 64,870,000,000 kilograms

Work is done on the boxes as we push it around the store and on the piano when we drop it from the third floor  and work is not done on the locked door, on the dishes and on the bowling ball.

The work done is given by the dot product of the displacement and the force,

W = F.d

W = FdcosA, A is the angle at which the force is applied.

In the first scenario, the work is not done on the locked door that remains closed while we try to pull it open on the door as we push against it and open it, because there is no displacement.

Work in not done to pull a tablecloth out from under them and they remain in place on the dishes, because no displacement of the dishes.

Work is done on boxes as we lift them and place them on the shelf on a shopping cart as we push it around the store because displacement happened.

Work is done on the piano when we drop it from the third floor to the ground floor because A = 0 degrees.

Work is not done on the bowling ball that we are holding while waiting for our turn to bowl because A = 90 degrees.

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Answer:

Yes

Explanation:

I love THAT SONG. And it is a good essay.

Answer: ( yes i do like your essay! )

I am breaking down in tears. /j

I should've expected this and i still fell for it  

Answer:

20m/s due east

Explanation:

Given parameters:

Displacement eastward  = 200m

Time  = 10s

Unknown:

Velocity  = ?

Solution:

Velocity is the displacement divided by time;

    Velocity  = \(\frac{displacement}{time}\)  

 Velocity  = \(\frac{200}{10}\)    = 20m/s due east

The principal difference between an MHD generator and a conventional generator lies in their operational mechanisms.

While conventional generators work by converting mechanical energy into electrical energy through the use of electromagnetic induction, MHD generators produce electricity by utilizing a combination of magnetic and electric fields to ionize a conductive gas and create a flow of charged particles.

Additionally, MHD generators can operate at higher temperatures and pressures than conventional generators, allowing for more efficient energy production.

However, MHD generators are more complex and expensive to build and maintain than conventional generators, and they require a constant source of high-temperature gas to function.

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Answer:

She will use one 2 as a subscript.

Explanation:

Nitrogen is a chemical element with the symbol "N" and has an atomic number of 7. Thus, it is found in group (5) of the periodic table and as such it has 5 electrons in its outermost shell. Therefore, nitrogen has two (5) valence electrons.

On the other hand, oxygen has an atomic number of 8 and with the symbol "O."

When nitrogen and oxygen react chemically, they produce a compound known as nitrogen dioxide \( NO_{2} \)

In this scenario, Jenny is studying a compound that has two oxygen atoms and one nitrogen atom. Therefore, the statement which describes the subscripts she will use to write the chemical formula is, she will use one 2 as a subscript.

\( N + O_{2} ------> NO_{2} \)

Where: 2 represents the subscript of oxygen.

Answer:

A- she will use 2 as a subscript

Explanation: because im doing the test rn and i got it right on edg2021

The theoretical efficiency is greater than that of the actual efficiency of the engine. This is because heat engine always produces some waste heat.

The Second Law of Thermodynamics states that a heat engine cannot be 100% efficient. In practice, a heat engine is only 100% efficient when it is operating at about 30-50% efficiency.

If we were to multiply this by 100, we would get the efficiency as a percent: 49%. This is the theoretical maximum efficiency. If we were to actually build an engine, it would be less efficient than the theoretical engine. The theoretical engine that can achieve this theoretical maximum efficiency is called the Carnot Engine.

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Answer:

the answer is C.

Explanation:

Answer:

The gaps left between successive rails on a railway track, the reason is that the rails expand in summer. The gap is provided to allow for this expansion. If no gap is left, the expansion in summer will cause the rails to bend sideways. That will result in train accidents

Answer:

The gaps left between successive rails on a railway track, the reason is that the rails expand in summer. The gap is provided to allow for this expansion. If no gap is left, the expansion in summer will cause the rails to bend sideways. That will result in train accidents.

I hope it's helpful!

The amount of work done in dragging a 100 kg block with a velocity of 10 ms⁻¹ for 10 seconds is 5.0 x 10³ J.

The formula for work done can be given as follows:

Work done = force x distance moved in the direction of force

Hence, the amount of work done in dragging a 100 kg block with a velocity of 10 ms⁻¹ for 10 seconds is 5.0 x 10³ J.

Fictional force, f = μR = 0.5 × 1000 = 500 N (where R = normal reaction = weight of the block = mg)

Force acting on the block to drag it, F = ma = 100 × 10 = 1000 N (where a = acceleration = change in velocity/time = 10/10 = 1 m/s²)

Net force acting on the block, F' = F - f = 1000 - 500 = 500 N

The distance moved in the drection of force in 10 seconds = 10 × 10 = 100 m

Therefore, work done = F' × distance moved in the direction of force = 500 × 100 = 50,000 J = 5.0 x 10³ J.

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a) The image distance is -31.18 cm (real and inverted).

b) The magnification is -1.28.

c) Sherlock Holmes observes a real and inverted image that is smaller in size.

a) To find the image distance, we can use the lens equation:

  1/f = 1/di + 1/do

  where f is the focal length, di is the image distance, and do is the object distance. Given that the focal length (f) is 24.5 cm and the object distance (do) is 10.5 cm, we can substitute these values into the equation:

  1/24.5 = 1/di + 1/10.5

  Solving for di, we find:

  di ≈ -31.18 cm

  The negative sign indicates that the image is formed on the opposite side of the lens, which corresponds to a real image.

b) The magnification (M) is given by the ratio of the image distance to the object distance:

  M = di/do

  Substituting the values, we have:

  M ≈ -31.18 cm / 10.5 cm ≈ -1.28

  The negative magnification indicates that the image is inverted.

c) Based on the negative magnification and the fact that the image is formed on the opposite side of the lens (real image), we can conclude that Sherlock Holmes observes a real and inverted image. Since the magnification is greater than 1, the image is smaller in size compared to the object.

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Work done by a force is given as the product of force and the distance moved by the force.

Work done is the product of force and the distance moved by the the force.

Thus, distance required by the 100 N force is given as:

Distance = 1000/100 = 10 m

Distance to be moved is 10 m.

Force applied = work done/ distance

Force applied by the hoist = 500/2

Force applied by the hoist = 250 N

Distance moved in one push-up = 25 cm = 0.25 m

Work done by the athlete after one push-up = 250 × 0.25 m

Work done by the athlete = 62.5 J

Distance moved by the force = 0 m

Work done = 500 × 0 = 0 N

Therefore, for work to be done, force has to move a distance.

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According to Hawthorne, there were few physicians in Boston due to the Puritan belief that physical ailments were a punishment from God and therefore should not be interfered with. Additionally, medical education was not highly valued in Puritan society, leading to a shortage of trained doctors in the area.

According to Nathaniel Hawthorne, the acclaimed American author of the 19th century, there is no explicit statement suggesting that there were few physicians in Boston. Hawthorne is renowned for his literary works like "The Scarlet Letter" that explore various aspects of Boston society. However, his writings do not specifically address the number of physicians in Boston.

It is important to recognize that the availability of physicians and medical professionals can differ based on historical circumstances and other factors within a particular city or region. To obtain an accurate understanding of the physician situation in Boston during Hawthorne's time, it would be necessary to consult relevant historical records and sources from that era.

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Hello, use the formula:

Pe = mgh

Data:

Pe = Potential energy = ¿?

m = Mass = 48 kg

g = Gravity = 9,81 m/s²

h = Height = 7 m

Replacing according our data:

Pe = 48 kg * 9,81 m/s² *  7 m

Pe =3296,16 J

The potential energy of the skateboarder is 3296,16 Joules

The saturation of the soil sample is 0.16 and the dry unit weight is X kN/m3.

The saturation of the soil sample can be calculated using the relationship between porosity and saturation. Porosity (n) is defined as the ratio of the void volume to the total volume of the soil sample. It is given that the porosity of the soil sample is 0.49. Since porosity is the ratio of void volume to total volume, the saturation (S) can be calculated as 1 minus the porosity:

Saturation (S) = 1 - porosity = 1 - 0.49 = 0.51

To calculate the dry unit weight (γd) of the soil sample, we need to consider the specific gravity (Gs) and the moisture content (w). The dry unit weight is the weight of the solid particles per unit volume of the soil sample. The formula to calculate the dry unit weight is:

γd = Gs * γw / (1 + w)

Given that the specific gravity (Gs) is 2.41 and the moisture content (w) is 0.33, we can substitute these values into the formula to calculate the dry unit weight.

Therefore, the saturation of the soil sample is 0.16, and the value of the dry unit weight is X kN/m3.

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Answer:

a)     1: 100  F₂ = 100 F₁,  b) P₁ = P₂   1:1

Explanation:

The pressure in a system is the same for a given horizontal line, therefore

          P₁ = P₂

where subscript 1 is for small piston and index 2 is for large piston 2

a) they ask the relation of the forces

pressure is defined by

        P = F / A

for the small piston

        P₁ = F₁ / A₁

the area of ​​the piston is

        A₁ =π r₁²

        P₁ = F₁ /π r₁²

for big piston

         P₂ = F₂ / A₂

in the exercise indicates that the diameter of the large piston is 10 times the diameter of the small piston

         A = π r₂²

         r₂ = 10 r₁

          r₂ = π 10² r₁²

we substitute

         P₂ = \(\frac{F_2}{ \pi \ 100 \ r_1^2}\)

we equalize the pressures

          \(\frac{F_1 }{ \pi \ r_1^2 } = \frac{F_2}{ \pi \ 100 r_1^2}\)

           F₁ = F₂ / 100

            F₂ / F₁ = 100

therefore the force ratio is

             1: 100

b) according to Pascal's principle for the same height the pressure is the same regardless of the shape of the container, therefore the pressure of the two pistons is the same

           P1 = P2

             1: 1

Answer:

3504.4 kgm/s

Explanation:

First, convert km/hr to m/s:

19 km/hr x 1000m/1km x 1/60min x 1/60s = 5.28 m/s

p = mv

p = (664 kg)(5.28 m/s) = 3504.4 kgm/s

A 2100 kg truck is moving at 31m/s[E] and crashes into a 1500 kg car traveling at 24m/s[E]. The two cars lock bumpers and continue as one object. The decrease in kinetic energy during the inelastic collision is 870194 J. The law of conservation of momentum is used to determine the final velocity of the combined vehicles.

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Answer:

a magnet is a tool to help bring something medal to you

Explanation:

say you are trying to bring a object to you that is medal and it is small so like a key you can use the magnet to get the key

The pressure of 3.20 mol of HCl in a 4.90-L vessel is approximately 22.4 atm when calculated using the van der Waals equation of state and approximately 24.4 atm when calculated using the ideal gas equation.

a) The pressure of 3.20 mol of HCl at 499 K in a 4.90-L vessel, calculated using the van der Waals equation of state, is approximately 22.4 atm.

The van der Waals equation of state accounts for the deviations of real gases from ideal behavior, taking into consideration intermolecular forces and the finite volume occupied by gas molecules. The equation is given by:

(P + a(n/V)^2)(V - nb) = nRT

Where:

P is the pressure

a and b are the van der Waals constants specific to the gas

n is the number of moles

V is the volume

R is the ideal gas constant

T is the temperature

For HCl gas, the van der Waals constants are:

a = 6.49 L^2 atm/mol^2

b = 0.0562 L/mol

Plugging in the values:

n = 3.20 mol

V = 4.90 L

R = 0.0821 L·atm/(mol·K)

T = 499 K

Using the van der Waals equation and solving for P:

(P + (6.49 L^2 atm/mol^2)(3.20 mol / (4.90 L))^2)(4.90 L - (0.0562 L/mol)(3.20 mol)) = (3.20 mol)(0.0821 L·atm/(mol·K))(499 K)

P ≈ 22.4 atm

b) The pressure calculated using the ideal gas equation under the same conditions is approximately 24.4 atm.

Explanation and calculation:

The ideal gas equation is given by:

PV = nRT

Using the same values as before:

n = 3.20 mol

V = 4.90 L

R = 0.0821 L·atm/(mol·K)

T = 499 K

Solving for P:

P = (3.20 mol)(0.0821 L·atm/(mol·K))(499 K) / 4.90 L

P ≈ 24.4 atm

Under the given conditions, the pressure of 3.20 mol of HCl in a 4.90-L vessel is approximately 22.4 atm when calculated using the van der Waals equation of state and approximately 24.4 atm when calculated using the ideal gas equation. The van der Waals equation accounts for intermolecular forces and the finite volume of the gas, resulting in a slightly lower pressure compared to the ideal gas equation, which assumes ideal behavior.

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The elements which are in the unknown according to the diagram given is He and is therefore denoted as option C.

This is referred to as a type of graph which shows the intensity of light being emitted over a range of energies and it varies with properties such as wavelength or frequency. When light is passed through a prism, band of colors are usually observed which signifies light spectrum with the plural being spectra.

In the diagram given , the element He and the unknown have the most similar spectra observed as a result of the lines which fall in almost the same range and place and it makes it the most likely component of the mixture of unknown gases.

This is therefore the reason why option C was chosen as the most appropriate choice.

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Answer:B

Explanation:

The force of gravitation depends on the mass of the object. As the mass increases, the speed of the falling object also increases because it experience more gravitational pull from earth. Thus, option D is correct.

Gravitational force is a kind of force by which an object attracts other objects into its center of mass. We are all standing on the ground because of the gravitational pull of earth.

Gravitational force is directly proportional to the mass of the objects and inversely proportional to the distance from the surface. Therefore, the force exerted by earth on massive body is greater than that on a light body.

Here, the ball with greater  mass hit the ground with less time compared to the one with less mass. Hence, the mass becomes a factor  affecting the speed of a falling object when the object is dropped a great distance from the surface of the earth. Thus, the massive body will be pulled more by earth.

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Answer:

It depends on the quality of the elements upon the planet. They require carbon dioxide and sun light to photosynthesize and perform aerobic respiration with other components. However, there are some current planets that consist plants upon their surface.

This plan can be successful because larger dancers often have a natural grace and fluidity to their movements, while smaller dancers in a ballet tend to be more agile and quick.

Ballet is an important part of dance history. Ballet aims to tell stories through movement by adhering to strict, classical rules that were established in France around 1661. Ballet values the dancer's grace, stories, histories, movement, and self-discipline.

By playing to these strengths, the ballet director can create a more visually appealing and dynamic performance. Additionally, this approach can help to ensure that each dancer is able to showcase their unique abilities and contribute to the overall success of the production.

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The complete question is:

A ballet director assigns slow, graceful steps to larger dancers, and quick movements to smaller dancers. Why is this plan successful?