A heat engine absorbs 359 J of thermal energy and performs 29.8 J of work in each cycle. Find the efficiency of the engine.

Answer:

is

Explanation:

e

The acceptable range of carbon dioxide in the flue gas during combustion efficiency measurements is typically between 6% and 12%.

Combustion efficiency is a measure of how effectively fuel is being burned in a combustion system, such as a furnace, boiler, or engine. It is important to monitor and optimize combustion efficiency to ensure efficient energy utilization and minimize harmful emissions. One key parameter that is measured during combustion efficiency testing is the carbon dioxide (CO2) content in the flue gas.

Carbon dioxide is a byproduct of complete combustion, and its presence in the flue gas indicates that the fuel is being burned efficiently. However, excessive levels of carbon dioxide can indicate incomplete combustion or poor fuel-air mixing, which can lead to energy waste and increased emissions of other pollutants. On the other hand, low levels of carbon dioxide can indicate excess air in the combustion process, which also reduces efficiency.

The acceptable range of carbon dioxide in the flue gas during combustion efficiency measurements is typically between 6% and 12%. This range ensures that the combustion process is efficient without excessive air or fuel wastage. It is important to note that the specific acceptable range may vary depending on the type of fuel being burned and the combustion system being used. Regular monitoring and adjustment of combustion parameters, including carbon dioxide levels, can help optimize combustion efficiency and reduce environmental impact.

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Answer:

90,000 meters

Explanation:

75*1200 = 90,000

Answer:

Two point charges are separated by 6.4 cm . The attractive force between them is 10 N .

units.

Explanation:

Answer:

Option (b).

Explanation:

Two forces are acting perpendicularly on an object. We have, F₁ = 8.2 N and F₂ = 20.6 N

We need to find the net force acting on the object. When two forces are acting in perpendicular to each other, the net force on it is given by :

\(F=\sqrt{F_1^2+F_2^2} \\\\=\sqrt{8.2^2+20.6^2} \\\\=22.17\ N\)

or

F = 22 N

Let \(\theta\) is the angle. It can be given by :

\(\tan\theta=\dfrac{F_1}{F_2}\\\\\tan\theta=\dfrac{8.2}{20.6}\\\\=21.7^{\circ}\)

or

\(\theta=22^{\circ}\)

So, the net force is 22 N and the direction is 22° counterclockwise from F₁. Hence, the correct option is (b).

To determine the tension in the string at the bottom of the circle, we need to consider the forces acting on the object.

At the bottom of the circle, the object is moving in a vertical direction, and the tension in the string provides the centripetal force required to keep the object moving in a circular path.

The net force acting on the object at the bottom of the circle is the sum of the tension force (T) and the gravitational force (mg), where m is the mass of the object and g is the acceleration due to gravity.

Since the object is moving at a constant speed, the net force must provide the centripetal force, which is given by the equation:

F_c = m * (v^2 / r),

where F_c is the centripetal force, m is the mass of the object, v is the velocity, and r is the radius of the circle.

In this case, the mass (m) of the object is 2 kg, the velocity (v) is 4 m/s, and the radius (r) is 1 m.

Using the centripetal force equation, we have:

T + mg = m * (v^2 / r).

Substituting the given values, we get:

T + (2 kg * 9.8 m/s^2) = 2 kg * (4 m/s)^2 / 1 m.

Simplifying the expression, we find:

T + 19.6 N = 32 N.

Subtracting 19.6 N from both sides, we get:

T = 32 N - 19.6 N.

Calculating this expression, we find:

T ≈ 12.4 N.

Therefore, the tension in the string at the bottom of the circle is approximately 12.4 Newtons (N).

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While newer homes typically employ circuit breakers to prevent electrical overload and fires, some older homes may still use fuse boxes instead.

Circuit breakers and fuse boxes are both electrical devices designed to prevent overloads and short circuits in the electrical circuits of a house. However, circuit breakers are now more commonly used in new homes, while fuse boxes are more common in older homes.

Fuse boxes use fuses that need to be replaced when they blow out due to an electrical overload, while circuit breakers automatically switch off when there is an overload or short circuit. Additionally, circuit breakers are considered to be safer than fuse boxes as they don't pose the same risk of electrical shock when replacing fuses.

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Answer:  Conduction occurs more readily in solids and liquids, where the particles are closer to together, than in gases, where particles are further apart.

Explanation: not sure is this is your topic

There are 3 states of matter: solid, liquid and gas

Liquids. Conduction occurs better in solids and liquids as the particles are closer to together than in gases as the particles are very further apart.

Taking into account the definition of density, the volume of the sample of gold is 0.0646998 L.

Density is defined as the property that allows us to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know that:

Replacing in the definition of density:

19.32 g/cm³= 1250 g÷ volume

Solving:

19.32 g/cm³× volume= 1250 g

volume= 1250 g÷ 19.32 g/cm³

volume= 64.6998 cm³= 0.0646998 L (1 cm³= 0.001 L)

In summary, the volume of the sample of gold is 0.0646998 L.

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Answer:The first is the magnitude of the force applied on the body and the second is the perpendicular distance from the line of action of force and the axis of rotation of the body.

Explanation:

The correct answer is: Copernicus, Kepler, and Galileo laid the foundation for the scientific revolution.

These three individuals were key figures in the development of modern science and made significant contributions to our understanding of the universe.

1. Copernicus: Nicolaus Copernicus proposed the heliocentric model of the solar system, which stated that the Sun, not the Earth, was at the center of the universe. This revolutionary idea challenged the long-held belief in the geocentric model and paved the way for further scientific inquiry.

2. Kepler: Johannes Kepler was a mathematician and astronomer who formulated three laws of planetary motion. These laws described the motion of planets around the Sun and provided a mathematical framework for understanding celestial mechanics. Kepler's laws were instrumental in confirming and expanding upon Copernicus' heliocentric model.

3. Galileo: Galileo Galilei was a physicist, mathematician, and astronomer who made numerous groundbreaking discoveries. He used his telescope to observe the moons of Jupiter, the phases of Venus, and the mountains on the Moon, among other things. Galileo's observations provided empirical evidence that supported the heliocentric model and challenged the prevailing Aristotelian view of the cosmos.

In conclusion, Copernicus, Kepler, and Galileo played crucial roles in laying the foundation for the scientific revolution. Through their contributions, they advanced our understanding of the universe and set the stage for the development of modern science.

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Answer:

Nicolaus Copernicus

Explanation:

In 1543, Nicolaus Copernicus detailed his radical theory of the Universe in which the Earth, along with the other planets, rotated around the Sun. His theory took more than a century to become widely accepted.

The Paschen series is a spectral series of hydrogen-like atoms that is similar to the Balmer series, but with a different value of the principal quantum number.

Specifically, the Paschen series corresponds to transitions between an excited state with principal quantum number n greater than or equal to 3, and the n=3 energy level in hydrogen-like atoms.

Like the Balmer series, the Paschen series also produces a series of spectral lines, which are the result of the emission of electromagnetic radiation as the electrons in the atom transition from higher energy levels to lower energy levels.

However, the wavelengths of the spectral lines in the Paschen series are longer than those in the Balmer series, due to the higher energy levels involved.

Overall, the Paschen series is an important aspect of the study of atomic physics, and provides valuable insights into the behavior of hydrogen-like atoms and their spectral emissions.

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When calculating work done by forces, the work of an internal force does not have to be considered because internal forces act in equal but opposite collinear pairs.

Internal forces are forces that act between different parts of the same object or system. These forces can cause deformation or changes in the shape of the object, but they do not contribute to the net work done on the object as a whole. This is because internal forces occur in equal but opposite pairs, meaning that the work done by one internal force is canceled out by the work done by its counterpart. As a result, when calculating the work done by external forces on an object or system, the work of internal forces is not considered since they do not contribute to the overall net work. The focus is on the external forces that interact with the object or system from its surroundings. Therefore, option B) the forces act in equal but opposite collinear pairs is the correct explanation for why the work of internal forces does not have to be considered.

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Answer:

cookie

Explanation:

Answer: 1 m/s/s

Explanation: One Newton is defined as the amount of force required to give a 1-kg mass an acceleration of 1 m/s/s.

The linear distance Δ between the ninth order maximum and the fourth order maximum on the screen is 729.6 mm.

Use formula Δ = L * (y9 - y4).

where L is the distance between the double gashes and the screen, and y9 and y4 are the distances between the centre  outside and the ninth and fourth order maxes.

 To get y9 and y4, we may use the maximum position formula in a double- slit  hindrance pattern

 y =  m * λ * L/ d  

where m is the loftiest order, is the light wavelength, L is the distance between the double gashes and the screen, and d is the slit distance.   With the  handed values, we get

d = 0.100 mm = 0.0001 m

λ = 552 nm = 0.000552 m

L = 49.0 cm = 0.49 m

m = 9

y9 = m * λ * L / d = 9 * 0.000552 * 0.49 / 0.0001 = 2.6876 m

Δ = L * (y9 - y4) = 0.49 * (2.6876 - 1.2056) = 0.7296 m

Δ = 729.6 mm

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Answer:

21

Explanation: its actually 20.85 but i guess they round to 21

Answer:

food

Explanation:

The S.I. unit of E is NC^-1 and that of B is NA^-1 m^-1, then unit of E/B is A m/C (ampere meter per coulomb). This unit represents the ratio between the electric field and the magnetic field, indicating the strength and direction of the electromagnetic field.

The SI unit of electric field (E) is NC^(-1) (newton per coulomb) and the SI unit of magnetic field (B) is NA^(-1) m^(-1) (tesla). To determine the unit of E/B, we need to divide the unit of E by the unit of B.

Dividing the unit of E (NC^(-1)) by the unit of B (NA^(-1) m^(-1)), we can simplify the expression:

E/B = (NC^(-1))/(NA^(-1) m^(-1))

To simplify this expression, we can cancel out the common units in the numerator and denominator:

E/B = (N/C)/(N/(A m))

Now, let's simplify further by dividing the numerator and denominator:

E/B = (N/C) * (A m/N)

Canceling out the common units:

E/B = (A m)/(C)

Therefore, the unit of E/B is A m/C (ampere meter per coulomb).

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Answer:

A) D = 57.8

B) 900 sec

C) 1.11 x 10^-3 HZ

D) V= 0.016m/s

E) 1.12x10^-4m/s

F) 2.24 x 10^-3 N

Decrease

The mathematical relationship between heat, internal energy and work done by the system is given as:

△U = Q + W

where △U is the change in the internal energy

W is the workdone by the system

Q is the heat energy in the system

Since the workdone by the system is negative, when a system does work, there is a depletion in the amount of energy possessed by the system.

Due to this loss of energy by the system as a result of the workdone, the internal energy decreases.

Answer:

It is lime. Basically, the lime is kinda too weak for it to produce. Thats what I remember my teacher saying. Hope this helps!

Explanation:

Answer:

34.51

Explanation:

k=1/2mv² is the kenetic energy equation to fill is in

k=[1/2(0.235)×50]²

Answer:

The answer should be south

Explanation:

Because it has more force to the south then to the north, west and east are the same so (40N South)

Answer:

transcranial

Explanation:

pls mark brainliest

Answer:

I believe it is 13,419 joules.

Explanation:

I could be very wrong, please fact check me

The magnetic field inside the loop of wire will be directed into the page. Option b is correct.

When a current flows through a loop of wire, it generates a magnetic field around it. The direction of the magnetic field can be determined using the right-hand rule. If you curl the fingers of your right hand in the direction of the conventional current (from right to left in this case), your thumb will point in the direction of the magnetic field inside the loop. In this scenario, the current flows up the right side of the loop, then around the top and back down the left side.

Using the right-hand rule, the magnetic field inside the loop is directed into the page. This is because the magnetic field lines form a loop inside the wire, and the direction of the field is perpendicular to the plane of the loop, pointing into the center of the loop. Option b is correct.

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Answer: Sand, anthracite, and garnet are all frequently used as filter material for water treatment.

Explanation:

Filtration: It is the process by which fine floc particles, color, dissolved minerals and micro-organisms are removed. It also removes suspended solids that do not get removed in sedimentation and it is also economically effective.

The following different types of material are used for water filtration process:

Carbon or activated carbon: Carbon is also known as charcoal. Anthracite is mostly used for water filtration.

Garnet sand ( chemically inert or non metallic mineral) is an ideal water filter media.