(b) The output current of the generator is 2.0A. The output potential difference (p.d.) of the
generator is 11V.
(1) Calculate the output power of the generator. Electrical Power = Pd x curren
output power =
[2]

Answer:

Scientists can discuss and compare very large numbers, which is useful because substances in everyday quantities contain very large numbers of atoms and molecules.

Explanation:

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Actually Welcome to the concept of Efficiency.

Here we can see that, the Input work is given as 2.2 x 10^7 J and the efficiency is given as 22%

The efficiency is => 22% => 22/100.

so we get as,

E = W(output) /W(input)

hence, W(output) = E x W(input)

so we get as,

W(output) = (22/100) x 2.2 x 10^7

=> W(output) = 0.22 x 2.2 x 10^7 => 0.484 x 10^7

hence, W(output) = 4.84 x 10^6 J

The useful work done on the mass is 4.84 x 10^6 J

Answer:

1254 J

Explanation:

Applying,

Q = mcpΔT................... Equation 1

Where Q = heat, m = mass of water, cp = specific heat capacity of water, ΔT = Change in temperature.

From the question,

Given: m = 15 g, cp = 4.18 J/(g.°C), ΔT = 20°C

Substitute these values into equation 1

Q = 15×4.18×20

Q = 1254 J

Hence the amount of energy required is 1254 J

Answer:

152 cm

Explanation:

16 hands * 9.5 cm / hand = 152 cm

Answer:

Q = 8608.8 J

Explanation:

Given that,

The mass of ice, m = 34 g

The temperature changes from -2°C to 118°C​.

The specific heat of ice, c = 2.11 J/g°C

The heat energy needed,

\(Q=mc\delata T\\\\Q=34\times 2.11\times (118-(-2))\\Q=8608.8\ J\)

So, 8608.8 J of energy is needed.

The direction of the kinetic frictional force is always the opposite of the object's velocity. Direction is parallel to the contact surface and is the opposite of the object's sliding direction.

Always, friction pushes in the direction that forbids sliding (often called relative motion). There are two kinds of friction, in case you forgot: If the thing slides, there is kinetic friction. Kinetic friction pulls inexactly counter to the velocity in order to stop sliding.

The direction of friction is always perpendicular to the normal force, parallel to the surface between the objects, and the opposite of the direction of motion.

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Since the mass is attached to an ideal spring, the system will undergo simple harmonic motion. The maximum distance the mass will fall is equal to the amplitude of the oscillation.

The period of oscillation can be calculated as:

T = 2π√(m/k)

where m is the mass and k is the spring constant.

Substituting the given values, we get:

T = 2π√(0.7 kg / 86 N/m) ≈ 0.887 s

The maximum distance the mass will fall is equal to half the amplitude of the oscillation, which can be calculated using the equation:

x = A cos(2πt/T)

where x is the displacement of the mass from its equilibrium position at time t, and A is the amplitude of oscillation.

At the maximum displacement, cos(2πt/T) will be equal to -1. Therefore,

A = -x

The velocity of the mass at the maximum displacement will be zero. Therefore, the total energy of the system will be equal to the potential energy at the maximum displacement:

1/2 k A^2 = m g A

where g is the acceleration due to gravity.

Solving for A, we get:

A = (m g / k) = (0.7 kg x 9.81 m/s^2) / 86 N/m ≈ 0.0807 m

Therefore, the maximum distance the mass will fall is approximately 0.0807 m.

Answer:

a.

445 nm : 4.45 x 10^-19 J

445 nm : 2.78 eV

586 nm : 3.38 x 10^-19 J

586 nm : 2.11 eV

667 nm : 2.99 x 10^-19 J

667 nm : 1.87 eV

b.

E3 to E1 : ΔE = 1.87 eV

E3 to E2 : ΔE = 0.24 eV

E2 to E1 : ΔE = 0.24 eV

Explanation:

a) To calculate the energies of the emitted photons, we can use the formula:

E = hc/λ

where E is the energy of the photon in Joules, h is Planck's constant (6.626 x 10^-34 J s), c is the speed of light (3.00 x 10^8 m/s), and λ is the wavelength of the photon in meters.

For the first line of wavelength 445 nm:

E = hc/λ = (6.626 x 10^-34 J s)(3.00 x 10^8 m/s)/(445 x 10^-9 m) = 4.45 x 10^-19 J

To convert this to electron volts (eV), we can use the conversion factor 1 eV = 1.602 x 10^-19 J:

E = 4.45 x 10^-19 J/(1.602 x 10^-19 J/eV) = 2.78 eV

For the second line of wavelength 586 nm:

E = hc/λ = (6.626 x 10^-34 J s)(3.00 x 10^8 m/s)/(586 x 10^-9 m) = 3.38 x 10^-19 J

E = 3.38 x 10^-19 J/(1.602 x 10^-19 J/eV) = 2.11 eV

For the third line of wavelength 667 nm:

E = hc/λ = (6.626 x 10^-34 J s)(3.00 x 10^8 m/s)/(667 x 10^-9 m) = 2.99 x 10^-19 J

E = 2.99 x 10^-19 J/(1.602 x 10^-19 J/eV) = 1.87 eV

b) The energy level diagram for an atom of the element which has produced these photons can be drawn as follows:

markdown

     E3

     |

     | ΔE = 1.87 eV

     |

     |

     |

     E2

     |

     | ΔE = 0.24 eV

     |

     |

     |

     E1

The electron transitions which have given rise to the three spectral lines are:

The transition from energy level E3 to E1, which produces the photon of wavelength 445 nm and energy 2.78 eV (ΔE = 1.87 eV).

The transition from energy level E3 to E2, which produces the photon of wavelength 586 nm and energy 2.11 eV (ΔE = 0.24 eV).

The transition from energy level E2 to E1, which produces the photon of wavelength 667 nm and energy 1.87 eV (ΔE = 0.24 eV).

Note that this energy level diagram is just one possible arrangement of energy levels that could produce the observed spectral lines. There may be other possible arrangements of energy levels that could also explain the observed lines.

ChatGPT

Answer:

A scalar is a quantity having magnitude and direction , and a vector is an object having magnitude and direction

Explanation:

PLEASE MARK BRAINLIEST

9514 1404 393

Answer:

  A1 = 3A, A2 = 1.5A

  Effective resistance = 2Ω

Explanation:

When the switch is closed, the voltage across each resistor is 6V, so the current through it (A2) is ...

  A2 = 6V/(4Ω) = 1.5A

There are two parallel paths, each with that current, so the current from the battery is ...

  A1 = A2 +A2 = 1.5A +1.5A = 3.0A

Then the effective resistance is ...

  Reff = 6V/(3.0A) = 2.0Ω

The solution to the circuit is ...

  A1 = 3A, A2 = 1.5A

  Effective resistance = 2Ω

Answer:

Mars is an opportunity for humans to carry forward the light of consciousness, plus it is the closest planet like earth, it has land humans can land on and although its small, theres still water

Answer:

Magnetic-field lines pass through cardboard, air, and certain other materials, depending on whether they're permeable or nonpermeable. Test different materials to see which gather magnetic lines of force and act as magnetic shields, and which allow magnetic lines of force to pass through them.

The main advantage multistage rockets have over conventional rockets is they get lighter by dropping empty sections that held fuel. So, option D is the correct answer.

Multistage rockets have an advantage over conventional rockets since they are outlined to drop off empty segments that held fuel as the rocket gains height. This diminishes the weight of the rocket, making it less demanding to realize elude speed and reach the circle. As each organizes is utilized, it is discarded, diminishing the general weight of the rocket and making it more effective.

Multistage rockets are more flexible and can be utilized for a more extensive extend of missions. They can be custom fitted to meet the particular necessities of a mission by including or evacuating stages, which permits them to carry payloads to diverse heights and speeds. In differentiation, conventional rockets carry all of their fuel and engines with them through the complete mission, making them heavier and less proficient. 

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To determine the diameter of the cylindrical rod that can withstand a load of 650 N, we need to consider the yield strength of the material and the applied load. the diameter of the rod is approximately 11.62 mm.

By using the formula for stress (force divided by area) and rearranging it to solve for the diameter, we can find the required diameter of the rod.

The stress experienced by the rod can be calculated using the formula:

Stress = Force / Area

Given that the yield strength of the steel is 310 MPa, we can set up the equation:

310 MPa = 650 N / (π * (diameter/2)^2)

We can rearrange the equation to solve for the diameter:

diameter = √(650 N / (310 MPa * π)) * 2

Substituting the given values, we find:

diameter ≈ √(650 / (310 * 10^6 * π)) * 2 ≈ 11.62 mm

Therefore, the required diameter of the rod to withstand the load is approximately 11.62 mm.

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The apparent frequency heard by the listener is 1190 Hz, which is higher than the original frequency of the sound wave due to the sound source moving toward the listener.

The apparent frequency heard by the listener in this scenario can be determined using the Doppler Effect equation, which relates the frequency of a sound wave to the velocity of the sound source and the velocity of the listener.

The formula for the apparent frequency (f') heard by the listener is:

f' = f(v + vr) / (v + vs)

where f is the frequency of the sound wave, v is the speed of sound (which is approximately 343 m/s at standard temperature and pressure), vr is the velocity of the sound source (50.0 m/s in this case, moving towards the listener), and vs is the velocity of the listener (which is 0 m/s as the listener is at rest).

Plugging in the values given in the problem, we get:

f' = 1000(343 + 50) / (343 + 0) = 1190 Hz

Therefore, the apparent frequency heard by the listener is 1190 Hz, which is higher than the original frequency of the sound wave due to the sound source moving toward the listener.

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1 meter per second squared is equivalent to 0.001 kilometer per second squared.

To convert 1 meter per second squared (m/s²) into kilometer per second squared (km/s²), we need to consider the conversion factor between meters and kilometers.

1 kilometer is equal to 1000 meters, so we can use this conversion factor to convert the units.

First, let's convert the acceleration from meters per second squared to kilometers per second squared:

1 m/s² = (1/1000) km/s²

Therefore, 1 meter per second squared is equal to 0.001 kilometer per second squared.

So, 1 m/s² = 0.001 km/s².

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Cardiovascular drug classes are Beta-blockers, Diuretics, Calcium channel blockers, and ACE inhibitors. The correct answer is options are A, B, D, and F.

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The correct question would be as

Which of the following are cardiovascular drug classes? Select all that apply.

A) Beta-blockers

B) Diuretics

C) Antibiotics

D) Calcium channel blockers

E) Antidepressants

F) ACE inhibitors

By using a model of Earth that spins on its axis, the student can best demonstrate the concept of Earth's rotation.

This rotation is responsible for the occurrence of day and night, as different parts of the Earth face the Sun at different times during the 24-hour period. The model can also help visualize the Earth's tilt, which plays a crucial role in creating seasons due to variations in sunlight intensity and duration in different regions throughout the year.

Additionally, the spinning model can provide an insight into the Coriolis Effect, which influences the movement of large-scale weather systems and ocean currents, the model can help explain why hurricanes and other weather patterns rotate clockwise in the Southern Hemisphere and counter-clockwise in the Northern Hemisphere. In summary, a spinning model of the Earth can effectively demonstrate essential concepts such as the cause of day and night, the occurrence of seasons, and the influence of Earth's rotation on weather systems and ocean currents. This hands-on learning approach can deepen students' understanding of the complex interactions within our solar system.

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The expected ratio of free-hanging earlobes to attached earlobes in the offspring is 1:2.

The diagram depicts a Punnett square used to predict the earlobe shape of two parents' offspring. The capital A represents free-hanging earlobes, while the lowercase a represents attached earlobes.

The Punnett square is a square diagram used to predict genotypes of a specific cross or breeding experiment. It is named after Reginald C. Punnett, who invented it in 1905. Biologists use the diagram to calculate the likelihood of an offspring having a specific genotype.

In this case, the genotype rato based on the attached diagram is 1:2.

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In operant conditioning, the response of the organism to the stimulus is (A) contingent on behavior.

Operant conditioning is a type of learning that occurs when the consequences of behavior, rather than the behavior itself, determine the probability of that behavior happening again in the future. A behavior's positive consequences increase the likelihood that it will be repeated, while negative consequences decrease the likelihood of that behavior being repeated.

When an animal is rewarded for performing a behavior, it is more likely to perform that behavior again in the future. The response of the organism to the stimulus in operant conditioning is dependent on behavior. The behavior must be emitted or done voluntarily by the organism. The reward for the organism's behavior is the consequence that determines whether the behavior will be repeated in the future or not.

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The optics of two related systems, the camera and the eye, are discussed in this video. the microscope and magnifier. The correct option is A.

Convex lenses and mirrors are used in light microscopes and telescopes to magnify extremely small or distant objects. A camera uses a convex lens to create a cropped image of an item.

A compound microscope can typically be used to observe samples at high magnification (40 to 1000x) by combining the effects of two sets of lenses: the ocular lens (in the eyepiece) and the objective lenses (close to the sample).

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The object believed to lie at the center of the Milky Way galaxy is a **supermassive black hole**.

Extensive observational evidence, including the motion of stars and gas clouds in the galactic center, indicates the presence of a massive and compact object. This object, known as Sagittarius A* (Sgr A*), has a mass of approximately four million times that of our Sun. It is located within a region called the Galactic Center, which is obscured by dust and gas, making direct observations challenging in visible light. However, observations using other wavelengths, such as radio and X-rays, have provided compelling evidence for the presence of a supermassive black hole. The behavior of stars in close proximity to Sgr A*, as well as the energetic processes observed in its vicinity, strongly suggest that it is a black hole with an incredibly strong gravitational pull at the center of our galaxy.

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13.02 meters

Explanation

the work done by the brakes makes the car stops, so the change in energy equals the work done

hence

also, the work done by a force is given by

then, let

replace

therefore, the answer is

13.02 meters

I hope this helps you

Answer:

Volume will be 15 mL. Solution:- If we look at the given information then it is Boyle's law as the temperature is constant and the volume changes inversely as the pressure changes. So, the volume of the air bubble at the surface will be 15 mL.

Answer:

A. 1st law.

Explanation:

Newton's first law of motion states that, an object or body will continue to be at rest or experience a uniform motion in a straight line at constant speed provided there's no action of an external force. Thus, unless compelled to change its state by an external force, a body will continue to be at rest or experience a uniform motion in a straight line.

The Newton's first law of motion is also known as the law of inertia; which is the tendency of a body to be at rest unless acted upon by an external force.

In this scenario, you are standing in a subway train and the train suddenly stops but your body continues to move forward. This is in accordance with Newton's first law of motion.

Hence, the sudden stoppage of the train generates a force which acts on the body thereby causing the passenger to tip or move forward.