A 16.2 resistor, 10.9 resistor, and a 4.9 resistor are connected in series with an emf source. The current in the 10.9 resistor is measured to be 4.00 A.

(a) Calculate the equivalent resistance of the three resistors in the circuit.

______
(b) Find the potential difference across the emf source.
_____V
(c) Determine the current in R1 and R3
I1 = ______A
I3 = ______A

Answer:

If the amplitude increases the volume increases and vice versa.So therefor the volume depends on how high or low the amplitude is.

When two or more sound waves occupy the same space, they affect one another. The waves do not bounce off of each, but they move through each other. The resulting wave depends on how the waves line up.

With constructive interference, two waves with the same frequency and amplitude line up – the peaks line up with peaks and troughs with troughs as in diagram A above. The result is a wave that has twice the amplitude of the original waves so the sound wave will be twice as loud.

Magnification can be achieved with a hologram when viewed with light that has a short wavelength.

In a hologram, light passes through an object and onto a photographic film, producing an interference pattern. The hologram is then illuminated by a laser or other monochromatic light source, causing the interference pattern to be recreated and appear as a three-dimensional image.

Holography is a technique that uses the wave properties of light to produce a three-dimensional image of an object. It was invented by Hungarian-British physicist Dennis Gabor in 1947. Holograms are made by recording the interference pattern produced when a beam of laser light is split into two beams, one of which is shone directly onto a photographic film, and the other of which is made to reflect off an object before reaching the film.

The size of the interference pattern on the film is related to the wavelength of the light used. Shorter wavelengths produce smaller interference patterns, which result in higher magnification. This means that the hologram can be viewed with light that has a short wavelength, such as blue or violet light, in order to achieve magnification. The use of holography has many practical applications, including in medicine, security, and entertainment.

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Starburst galaxies produce most of their light in the wavelength range of (B) the ultraviolet.

Starburst galaxies are characterized by intense bursts of star formation activity, where stars are formed at a much higher rate compared to normal galaxies. These bursts of star formation produce large amounts of ultraviolet (UV) radiation.

The high-energy radiation from the young, hot, and massive stars in starburst galaxies excites surrounding gas and dust, causing them to emit light primarily in the UV wavelength range. The UV radiation is produced by the ionizing radiation from the newly formed stars, which have surface temperatures in the range of thousands to tens of thousands of degrees Celsius.

The UV emission from starburst galaxies is of particular interest to astronomers because it provides valuable insights into the formation and evolution of stars and galaxies. However, since UV radiation is absorbed by the Earth's atmosphere, observations of starburst galaxies in the UV range require space-based telescopes or specialized instruments.

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The false statement is B) Homolytic bond cleavage yields neutral radicals in which each atom gains one electron.

In homolytic bond cleavage, each atom retains one electron from the shared pair of electrons, resulting in the formation of two neutral radicals, where each atom retains its original number of electrons.

No atoms gain or lose electrons in this process.

In a homolytic bond cleavage, a covalent bond is broken, and the shared pair of electrons is split equally between the two atoms involved in the bond.

This results in the formation of two neutral radicals, with each atom retaining one of the electrons from the shared pair.

A radical is a chemical species characterized by the presence of an electron that is unpaired, meaning it does not have a partner electron with which it forms a complete pair. When a covalent bond is homolytically cleaved, each atom involved in the bond gains one electron, resulting in the formation of two radicals.

These radicals are highly reactive due to the presence of the unpaired electron, which makes them prone to participate in further chemical reactions.

It's important to note that in homolytic bond cleavage, there is no transfer of electrons from one atom to another.

Instead, the bond is broken in a way that allows each atom to retain one of the electrons, leading to the formation of two neutral radicals.

Therefore, statement B, which suggests that each atom gains one electron, is false.

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Answer:

3.2 kJ

Explanation:

Since torque, τ = Iα where I = moment of inertia of round whetstone = 4.0 kgm² and α = angular acceleration of round whetstone.

So, α = τ/I

Given that τ = 20 Nm,

α = τ/I

α = 20 Nm/4.0 kgm²

α = 5 rad/s²

Using the equation for rotational motion, the angular velocity, ω = ω₀ + αt

where ω₀ = initial angular speed of round whetstone = 0 rad/s (since it starts from rest), ω = final angular speed of round whetstone, α = angular acceleration of round whetstone = 5 rad/s² and t = time of rotation = 8 s.

So, substituting the values of the variables into the equation, we have

ω = ω₀ + αt

ω = 0 rad/s + 5 rad/s² × 8s

ω = 0 rad/s + 40 rad/s

ω = 40 rad/s

So, its kinetic energy change ΔK = K₂ - K₁ = 1/2Iω² - 1/2Iω₀²

where K₁ = initial kinetic energy of round whetstone = 0 J (since the stone starts from rest) and K₂ = final kinetic energy of round whetstone after 8 s

Substituting the values of the variables into the equation, we have

K₂ - K₁ = 1/2Iω² - 1/2Iω₀²

K₂ - 0 J = 1/2 × 4.0 kgm² × (40 rad/s)² - 1/2 × 4.0 kgm² × (0 rad/s)²

K₂ = 2.0 kgm² × 1600 rad²/s² - 0 J

K₂ = 3200 kgm²rad²/s² - 0 J

K₂ = 3200 J

K₂ = 3.2 kJ

Answer:

3×x for both .they did the same amount.

The formula that can be used to solve for a missing magnification is M = D1/D2, which is derived from the equation

(D1M1 = D2M2).

The equation (D1M1 = D2M2) can also be rearranged to solve for a missing magnification.

Magnification formula: The magnification formula can be written as

M = m′/m

= -di/do

Where, m' is the height of the image formed, m is the height of the object placed, di is the distance of the image from the lens, and do is the distance of the object from the lens.

A formula that solves for a missing magnification can be written as M = D1/D2, where D1 and D2 are the distances of the object from the lens and the distance of the image from the lens respectively.

The conclusion can be drawn as the formula that can be used to solve for a missing magnification is M = D1/D2, which is derived from the equation

(D1M1 = D2M2).

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Answer:

Gravity acts all time between objects.

Explanation:

Gravity is a weak force but it acts all time between masses.

The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.

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Answer:

Energy is stored in the bonds between atoms

Answer:

Energy is stored in the bonds between atoms

Explanation:

Ape-x

Answer:

33.3m

Explanation:

Recall that for a regular wave, the relationship between, wavelength, frequency  and velocity (speed) is given by :

v = fλ,

where:

v = velocity (speed) of the wave = 50m/s

f = frequency of the wave = 1.5 Hz

λ = wavelength (we are asked to find this)

simply substitute the given values into the equation:

v = fλ

50 = 1.5 λ,

λ = 50/1.5

λ = 33.3m

The potential difference required to establish a 3.0 μC charge on the plates is approximately 169.49 V, which is closest to option (C) 1.7 × 10^4 V. Therefore the correct option is option C.

The capacitance of a parallel plate capacitor with A-sized plates separated by d and air between them is given by:

C = ε0 * A / d

where 0 is the open space permittivity (8.85 10-12 F/m).

The charge Q on a capacitor is proportional to the capacitance C and potential difference V as follows:

Q = C * V

Rearranging this equation yields:

V = Q / C

When we substitute the provided values, we get:

\(C = (1.77 10-8 F) = (8.85 10-12 F/m) * 2.0 10-3 m2 / (1.0 10-4 m)\)

\(Q = 3.0 × 10^-6 C\)

V = (3.0 × 10^-6 C) / (1.77 × 10^-8 F)

= 169.49 V

As a result, the potential difference necessary to charge the plates to 3.0 C is roughly 169.49 V, which is close to option (C) 1.7.

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Hi there!

We can solve this in two ways, using the Work-Energy theorem or kinematics.

Work-Energy:

We know that:

Ei = Ef, as long as there are no external forces working on the system.

Thus:

Ei = PE = mgh

Ef = KE = 1/2mv²

Therefore:

mgh = 1/2mv²

We can cancel out the mass:

gh = 1/2v²

9.8(10) = 1/2v²

√196 = v = 14 m/s

We can also solve using kinematics, using the equation:

vf² = vi² + 2ad

From rest (vi = 0 m/s) and a = g, so:

vf² = 2gd

vf = √2gh

vf = √(2 × 9.8 × 10) = 14 m/s

Explanation:

laws of motion

H=ut + 0.5gt^2

but u(initial velocity)=0 and g=10m/s^2

H=5t^2

=5×10^2

=5 × 100

=500m

Since energy can be measured as work, we can write energy = force x distance. Thus SI derived unit of energy has the units of newtons x meter or kg m2/s2.

Answer:20 miles

Explanation:

The photoelectric effect refers to the phenomenon where electrons are emitted from a material when it is illuminated with light. Before Einstein's proposal, the prevailing understanding of light was based on the wave theory of light, which suggested that light energy is transmitted continuously in the form of waves. However, there were several experimental observations that could not be explained by the wave theory alone.

Albert Einstein's proposal revolutionized the understanding of light and provided an explanation for the photoelectric effect. In his paper, Einstein proposed that light is composed of discrete packets of energy called photons. Each photon carries a specific amount of energy, which is related to the frequency of the light wave. The energy of a photon is given by Planck's equation: E = hf, where E is the energy, h is Planck's constant, and f is the frequency of the light.

According to Einstein's model, when light interacts with a material, such as a metal surface, the photons transfer their energy to electrons in the material. If the energy of a photon is sufficient to overcome the binding energy of an electron to the material, the electron can be ejected from the surface. This process is known as photoemission.

Einstein's model successfully explained several key observations of the photoelectric effect:

1. Threshold frequency: There is a minimum frequency (or equivalently, a minimum energy) of light below which no photoemission occurs. This can be explained by the fact that electrons require a minimum amount of energy to be freed from the material. The threshold frequency is directly related to the binding energy of the electrons in the material.

2. Intensity independence: The number of emitted electrons depends on the intensity (brightness) of the light, but the kinetic energy of the emitted electrons is independent of the intensity. This can be explained by the fact that the energy of each photon is fixed and does not depend on the number of photons present.

3. Electron energy distribution: The maximum kinetic energy of the emitted electrons increases linearly with the frequency of the light. This observation is consistent with the energy transfer from photons to electrons, where higher-frequency photons have more energy to transfer.

Einstein's model of the photoelectric effect provided strong evidence for the particle-like nature of light and contributed to the development of quantum mechanics. It laid the foundation for the understanding of the dual nature of light as both particles (photons) and waves, and it has wide-ranging applications in various fields, including solar cells, photodetectors, and spectroscopy.

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Answer:   0.0035

============================================

Explanation:

The exponent is -3, so we move the decimal point 3 spots to the left to go from 3.5 to 0.0035

If the exponent was positive, then we would move the decimal point to the right that amount of spaces.

The transformation of the U.S. healthcare system from a cottage-based, loose network to its current state has been shaped by technological advances, industrialization and urbanization, health insurance and financing, government regulation and policy, changing demographics and epidemiology, and market forces and economics.

Several key forces have shaped the transformation of the U.S. healthcare system from a cottage-based, loose network to its current state. These forces include:

1)Technological Advances: The development and adoption of medical technologies have significantly influenced the healthcare landscape. Advances in diagnostics, treatment modalities, electronic health records (EHRs), telemedicine, and medical devices have facilitated the expansion and integration of healthcare services.

2)Industrialization and Urbanization: The shift from rural to urban areas led to increased population density and the need for centralized healthcare facilities. Industrialization contributed to the growth of cities, creating a demand for larger hospitals, specialized medical services, and standardized healthcare practices.

3)Health Insurance and Financing: The rise of health insurance, both private and public (e.g., Medicare and Medicaid), played a crucial role in shaping the healthcare system. Insurance coverage allowed for broader access to healthcare services and influenced the consolidation of providers and the development of managed care organizations.

4)Government Regulation and Policy: Government policies and regulations have played a significant role in shaping the healthcare system. Legislation such as the Social Security Act of 1965 (establishing Medicare and Medicaid), the Affordable Care Act (ACA) of 2010, and various healthcare reforms have influenced the organization,

financing, and delivery of healthcare.

5)Changing Demographics and Epidemiology: Shifting demographics, such as an aging population and changes in disease prevalence and patterns, have driven changes in healthcare. The increase in chronic diseases and the need for long-term care have necessitated the development of specialized healthcare services and care models.

6)Market Forces and Economics: Market dynamics, including competition, cost pressures, and profit motives, have influenced the healthcare system's structure.

Consolidation of healthcare providers, the growth of healthcare corporations, and the emphasis on cost containment and value-based care have shaped the current landscape.

These forces, among others, have contributed to the transformation of the U.S. healthcare system into a more complex, integrated, and centralized structure, moving away from its cottage-based, decentralized origins.

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Answer:

allows no light to pass

Explanation:

Light waves cannot travel through solid objects. Therefore, the correct answer is option B.

Lightwaves or visible light are a part of electromagnetic waves/radiation that can be perceived by the human eye. It can travel through various types of mediums and even in a vacuum.

When light travels, it interacts with the atoms and molecules in the medium that it is going through. Because of that, light travels fastest in an empty space and travels the slowest in solid objects.

That being said, light can not travel through many kinds of solid objects. It's because solid objects tend to absorb light instead of allowing it to pass through them.

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Answer:

TRUE

Explanation:

Answer:

Answer is True

Explanation:

Mark as Brainliest I hope help you

Grains, pasta, etc provides the body with energy in the form of carbohydrates because they're absorbed quickly by the body and used for energy.

Answer: Gas

Explanation:

the particles in a gas aren’t close together and they move freely. Like the air. can I have Brainliest plz.

Answer:

I dont get it

Explanation:

The absence of any mechanical linkage between the throttle pedal and the throttle body requires the use of a . Stepper motor. Option D.

In modern vehicles, the throttle system is commonly controlled electronically using a stepper motor. A stepper motor is a type of electric motor that moves in discrete steps or increments, as directed by an electronic control unit (ECU) based on inputs from sensors, including the throttle pedal position sensor.

With the use of a stepper motor, there is no direct mechanical connection between the throttle pedal and the throttle body. Instead, the ECU interprets the position of the throttle pedal and commands the stepper motor to move the throttle plate accordingly, regulating the airflow into the engine.

The stepper motor provides precise control over the throttle position, allowing for smooth and accurate adjustments based on driving conditions and engine demands. The ECU can precisely control the throttle opening angle and adjust it in real-time, optimizing fuel efficiency, emissions, and overall engine performance.

Stepper motors are particularly suitable for this application as they can hold their position without power, provide precise control over angular displacement, and offer good torque characteristics.

They are commonly used in drive-by-wire throttle systems, where electronic signals replace mechanical linkages, providing improved responsiveness and integration with other vehicle control systems.

In summary, the absence of a mechanical linkage between the throttle pedal and the throttle body necessitates the use of a stepper motor for electronic throttle control, allowing for accurate and efficient regulation of the engine's air intake. So Option D is correct .

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Answer B

Explanation:

You are depressed if you are discouraged by life

Answer:

I*B. Feel discouraged about life and often has little energy* ( most likely answer)

*or C. Has sudden attacks of anxiety*

Explanation:

In my opinion I think the answer is *B. Feel discouraged about life and often has little energy* because I have experienced some depression in my life and I also know some people who have major depression and this is what its like ( the answer could also be c)

Answer:

C.

Explanation: