The switch in a series RL circuit with a resistance of 2.8 inductance of 4.6 h and voltage of 19.9 v is closed at t=0.3s What is the maximum current in the circuit?

Answer:

Explanation:

Average Speed = Total Distance / Total Time

5.3 m/s

Equation

Total distance = d1 + d2

Total Time = t1 + t2

Givens

Total Distance = 16 + 16

Total Distance = 32

Total Time = t2 + t1

Total Time = 2 sec + 4sec

Total Time = 6 sec

Solution

Average Speed = Total Distance / Total Time

Average Speed = 32 / 6

Average Speed = 5.33 m/s

The example of each of the energy electrical to heat, chemical to heat,  electrical to mechanical energy is as given below.

a.) Every electric heater has a resistor as its heating element. Electric heating is the conversion of electrical energy to thermal energy. It converts electrical energy into heat energy when an electric current crosses a resistor, according to the Joule heating principle.

b.) Exothermic reactions, which commonly release chemical energy in the form of heat, are those that take place. Newly formed bonds can store some of the heat energy required for a reaction to proceed as chemical energy.

c.) An electric motor converts electrical energy into mechanical energy. A generator converts mechanical energy into electrical energy. A storage dam's mechanical energy is transformed into electrical energy via a hydroelectric powerplant.

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Answer:

4

Explanation:

Not all plants can grow flowers. Only the ones thay have buds can.

Not all plants produce flowers. Hence, this is the characteristic which is not common in all plants.Therefore, the correct option is 4.

Flowers are the structures of plants. They are responsible for producing seeds that will grow into new plants. Flowers typically consist of a colorful or ornamental part called the corolla, which attracts pollinators such as bees and butterflies, and a reproductive part called the stamen and pistil, which contain the plant's male and female organs.

Not all green plants produce flowers. Flowering plants are a type of plant that belong to the group Angiosperms, but there are also non-flowering plants like ferns and mosses that do not produce flowers. Therefore, the correct option is 4.

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Answer:

1. Net force = 20 N

Direction = Right

Unbalanced

2. Net force = 7 N

Direction = Right

Unbalanced

3. Net force = 25 N

Direction = Left

Unbalanced

4. Net force = 60 N

Direction = Left

Unbalanced

5. Net force = 0

Direction = There is no motion, and it is not moving in any direction, it is at rest.

Balanced

6. Net force = 4 N

Direction = Down

Unbalanced

Explanation below

Hope this helps :)

Explanation:

To calculate net force, we must look at the direction it's pointing and the number of Newtons (N). If the arrow/arrows are pointing in the same direction, add the numbers, and the direction would be where the arrow is pointing (left,right,up,down). If the arrow/arrows are pointing in different directions, subtract the bigger and little number, and the direction would be where the bigger number is pointing (left,right,up,down).

It is only balanced when the net force is equal to zero. If the net force equals a number that's not zero like 1 and continuing on forever then it would be unbalanced.

"The required kelvin temperature when celsius temperature is given is calculated to be 305.65 K."

There are three main scales to measure temperature. They are Celsius, Fahrenheit and Kelvin scales of measurement. Kelvin is said to be the official metric unit of temperature.

The temperature of water is given as 32.5 °C.

The same temperature in kelvins should be found out.

Converting celsius scale temperature to kelvin scale, we should add up 273.15 to the temperature in celsius scale.
Kelvin temperature = 273.15 + Celsius temperature

Kelvin temperature = 273.15 + 32.5 °C = 305.65 K

Thus, the kelvin temperature is calculated to be 305.65 K.

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The apparent weight of the people would decrease if the rotational speed of the space station increased due to the centrifugal force acting outward, countering the force of gravity.

When a space station rotates, it creates a centrifugal force that acts outward. This force is directed away from the center of rotation and is proportional to the square of the rotational speed. As the rotational speed increases, the centrifugal force becomes stronger, effectively counteracting the force of gravity. Consequently, the apparent weight experienced by the people living in the space station decreases because the gravitational force is partially offset by the centrifugal force. This phenomenon is similar to experiencing weightlessness in space, where the gravitational force is significantly reduced or eliminated.

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A racetrack's banked angle must be 63.88 degrees for a car to travel at 100 m/s through a curve with a 500 m radius. For a racetrack, a banked angle is required. As the centripetal force now balances the weight

A flat road surface is indicated by a banking angle of zero. As the centripetal force now balances the weight of the vehicle and is vertical, the normal force no longer contributes to it. Because friction only works on surfaces with a rough finish, it can produce a centripetal force.

Here, despite the road being banked (raised up) at an angle, friction cannot prevent the car from skidding.

\(Tan\alpha =v^2/Rg\)

= 100^2/(500)(9.8)

=2.040

\(Tan\alpha =2.040\\\)

\(\alpha =Tan^-1(2.040)\\\)

\(\alpha\)= 63.88 degrees

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Precise cutting power.

The ratio between the power used to cut the material and the rate at which metal is removed from the material

If we assume that the force needed to cut the material is F and that the cutting tool's velocity is V, then the cutting power is the product of the force and the velocity.

F times V = Power P

Let's use MRR, or metal removal rate.

F×V/MRR

If the rate of metal removal and the speed of the cutting tool are assumed to be constants, then an increase in cutting force will result in an increase in specific energy.

The particular energy will then be.

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The input power required for a mass flow rate of 60 kg/min is calculated to be 871.35 kW.

Given that,

Initial temperature T₁ = 295 K

Final temperature T₂ = 460 K

Initial pressure P₁ = 105 k pa

Final pressure P₂ = 700 k pa

The specific heat loss from the compressor Q = 15 kJ/kg

The mass flow rate m = 60 kg/min

Refer to the properties of element to determine the specific heat of helium.

Cp = 5.19 kJ/kg.K

Apply the energy balance equation for calculating the input power.

W - m Q = m h₁ - m h₂

W - m Q = m (h₁ - h₂)

W - m Q = m Cp (T₁ - T₂)

where,

W is the input power

h₁ and h₂ are the initial and final enthalpy

Placing the values in the above expression, we have,

W - 60 kg/min (1 min/60 sec) × (-15 kJ/kg) = 60 kg/min (1 min/60 sec) × 5.19 kJ/kg.K (295 K - 460 K)

W = -871.35 kJ.s (1kW/1kJ) = -871.35 kW

Thus, the input power = 871.35 kW.

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The strong nuclear force, leptons do not interact with this force and include particles like electrons and muons.

Fundamental particles are the building blocks of matter and can be grouped into two categories based on their intrinsic properties and interactions with other particles: fermions and bosons. Fermions are the particles that make up matter and are divided into two subcategories: quarks and leptons. Leptons are fundamental particles that do not participate in the strong nuclear force, while quarks are particles that do participate in the strong nuclear force and are always found within hadrons, which are particles made up of quarks.

Hadrons are subdivided into two categories: baryons and mesons. Baryons are hadrons made up of three quarks, while mesons are hadrons made up of one quark and one antiquark. Some examples of baryons include the proton and the neutron, which are both made up of up and down quarks. Mesons include particles like the pion, kaon, and eta meson.

Leptons, on the other hand, are particles that do not interact with the strong nuclear force and include electrons, muons, and taus, as well as their corresponding neutrinos. Electrons are negatively charged particles that orbit the nucleus of atoms, while muons are similar in many ways to electrons, but are about 200 times more massive. Taus are even more massive than muons.

Overall, the categorization of fundamental particles into hadrons and leptons is based on their interactions with other particles, particularly with respect to the strong nuclear force. While hadrons are made up of quarks and are subject to the strong nuclear force, leptons do not interact with this force and include particles like electrons and muons.

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Jupiter's moon Io exhibits a high level of geological activity on its surface.Its volcanic eruptions and the dynamic processes at work provide insights into the geological forces operating in extreme environments

Jupiter's moon Io is known for its intense geological activity, making it the most volcanically active object in our solar system. The tidal forces exerted by Jupiter and its other moons cause significant internal heating, resulting in a dynamic and geologically active surface.

Observations by various space missions, including the Voyager and Galileo missions, have revealed hundreds of active volcanoes on Io. These volcanoes spew out plumes of sulfur and other materials, creating a complex network of colorful volcanic features. Some of these eruptions reach heights of up to 300 kilometers (190 miles), far exceeding any volcanic activity on Earth.

The high level of geological activity on Io's surface makes it a fascinating celestial body to study. By studying Io, scientists gain a better understanding of how celestial bodies evolve and the complex interactions between moons and their parent planets.

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Answer:

The comparison of unknown quantity with known quantity is called measurement.

The average speed of swimmer is 10 km/hr.

Speed is the rate of change of position of an object in any direction.

Distance is the total movement of an object without any regard to direction.

Given distance of pond is 1 km.

She swims 20 laps , i.e. total distance = 20 * 1 km = 20 km

Time taken to complete = 2 hr

There a relation between speed distance and time which is given by:                      

                         Speed = Distance / Time

                      ⇒Speed = 20/2 = 10 km/hr

So the average speed of swimmer is 10 km/hr.

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Answer:

W = 30 N

Explanation:

Applying the summation of torques about the wedge for equilibrium, taking the clockwise direction as negative. Since the ruler is balanced horizontally about the wedge. Therefore, the summation of all torques acting about the wedge must be equal to zero.

\((70\ N)(40\ cm - 10\ cm)-(30\ N)(50\ cm-40\ cm)-(W)(100\ cm - 40\ cm) = 0\\W(60\ cm) = (70\ N)(30\ cm)-(30\ N)(10\ cm)\\\\W = \frac{1800\ N.cm}{60\ cm}\)

W = 30 N

Phasors, or phasor diagrams, are an essential tool in understanding and analyzing parallel AC circuits. When dealing with AC circuits, it is crucial to consider the phase shift between voltage and current. Phasors provide a graphical way of representing quantities that change over time, such as cos(ωt+ϕ).

Phasors are vectors whose lengths represent the amplitude of a changing quantity, such as current. For example, if the current changes with time as I(t)=I0cos(ωt), a phasor would be a vector whose length represents I0, assuming it rotates counterclockwise with angular speed ω.

Phasors are particularly useful when analyzing AC circuits because they can help us determine the phase shift between voltage and current. For a resistor, the current and voltage are always in phase, meaning they are in sync with each other. For an inductor, the current lags the voltage by π/2 or 90 degrees, while for a capacitor, the current leads the voltage by π/2 or 90 degrees.

By using phasors, we can simplify complex circuit problems and calculate circuit parameters such as impedance and phase angle. The phasor approach allows us to convert complex equations involving cosines and sines into simple algebraic equations involving complex numbers.

In conclusion, phasors provide a convenient and efficient way of analyzing parallel AC circuits, especially when dealing with phase shifts between voltage and current. By understanding the use of phasors and phasor diagrams, we can easily solve complex circuit problems and calculate circuit parameters, making our work more efficient and accurate.

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If astronauts wished to determine whether a microscopic extraterrestrial object was alive, one feature they would not look for is cellular structure.

Cellular structure, including cells and their organization, is a defining characteristic of life on Earth. However, when examining microscopic extraterrestrial objects, it may not be appropriate to expect the presence of cellular structures similar to those found in terrestrial life forms.

Instead, astronauts would focus on other features that are indicative of life, such as metabolic activity, reproduction, response to stimuli, or the presence of organic molecules. These features are fundamental to the definition of life and can provide evidence of biological processes or signs of life even in microscopic extraterrestrial objects that do not possess cellular structures as we know them.

Therefore, while cellular structure is a key feature of life on Earth, it may not be applicable or present in the same way when examining potential extraterrestrial life forms.

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Answer:

The first one is true.

Explanation:

Here it is

Answer:

karishma tanna

Explanation:

it is correct

Karishma Tanna was declared as the winner.

The additional connection of the fifth identical bulb in parallel to the line of the first four bulbs will cause the fifth bulb to be brighter than the other four bulbs.

The total resistance in the circuit rises when bulbs are wired in series, which reduces the total current flowing through the bulbs. As a result, each individual bulb's brightness declines. The fifth bulb, when linked in parallel, creates a different path for current flow, effectively avoiding the other bulbs in the series. As a result, the circuit's overall current increases, increasing the brightness of all the bulbs—including the newly added bulb—in the circuit.

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If the Earth's distance from the sun were to double, the intensity of sunlight at our new orbit would decrease by a factor of four (2²).

What is orbit?

The route an object makes around another object while being pulled by gravity is known as an orbit. The planets, moons, asteroids, and other celestial bodies in our solar system revolve around the sun. Orbits are typically elliptical in shape rather than being complete circles.

The smaller object is maintained in place by the gravitational force between the two items because the object being orbited is normally far more massive than the object in orbit. The mass of the object being orbited and the separation between the two objects influence the speed of the object in orbit. Understanding and forecasting the motion of celestial objects, as well as planning the trajectories of spacecraft, depend heavily on orbits.

If the Earth's distance from the sun were to double, the intensity of sunlight at our new orbit would decrease by a factor of four (2²).

This is because the intensity of sunlight follows an inverse square law with distance, which means that if the distance between the Earth and the sun is doubled, the intensity of sunlight received by the Earth will decrease by a factor of four.

So, if the Earth were to move to an orbit twice as far away from the sun, the intensity of sunlight reaching the Earth would be only one-fourth as intense as it is now. This would have a significant impact on the temperature and climate of the Earth, as well as the availability of sunlight for photosynthesis by plants.

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Answer:

1.wavelength

Explanation:

2. Frequency

3.Speed

4.Amplitude

Answer:

Wave is the propagation of disturbance from one place to another in an organised manner. Waves can be mechanical waves or non-mechanical waves. Mechanical waves like sound waves, require a medium to propagate. While electromagnetic waves are non-mechanical waves that do not require a medium and can travel through a vacuum.

If the particles of the medium move in a direction perpendicular to the wave propagation then the waves are called transverse waves. Longitudinal waves are waves in which the particles of the medium vibrate parallel to the direction of wave propagation.

5 Important Properties of Waves

The main properties of waves are as follows –

Property 1:Amplitude

The maximum displacement of the wave from the mean position is called the amplitude of the wave. It is the maximum height from the centre line to the crest or the trough. The crest is the highest point of the wave and the trough is the lowest point of the wave. Amplitude is measured in metres.

Property 2: Frequency

The number of vibrations passing a fixed point in a given amount of time is called frequency. The unit of frequency is Hertz.

Property 3: Wavelength

Wavelength is the distance between two identical points (adjacent crests or troughs). It is measured in metres. Frequency and wavelength are inversely proportional to each other.

Property 4: Time Period

The time taken by a complete wave to pass through a particular point is called the time period. The time period is measured in seconds. The time period is the reciprocal of the frequency.

Property 5: Speed

For a wave, speed is the distance travelled by a particular point on the wave in the given interval of time. Speed is measured in metres per second.

A bimetallic strip breaks a circuit when things heat up by bending due to the differential expansion of its two metals, causing a movable contact to move away from its resting position and break the circuit.

A bimetallic strip is a component that consists of two different metal strips bonded together. When heated, the two metals expand at different rates, causing the strip to bend. This bending action can be used to break a circuit.

One end of the bimetallic strip is connected to the circuit, while the other end is connected to a movable contact. When the strip is cool, the contact is in its resting position, allowing the circuit to be complete. However, when the strip is heated, it bends, causing the contact to move away from its resting position and break the circuit.

The degree of bending is determined by the difference in coefficients of thermal expansion between the two metals. The metal with the higher coefficient of thermal expansion will expand more when heated, causing the strip to bend in that direction.

This mechanism is commonly used in thermostats and other temperature control systems. For example, in an electric kettle, a bimetallic strip may be used to control the temperature of the water. When the water reaches boiling point, the strip bends and breaks the circuit, turning off the kettle.

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Answer:

43.3 m/s.

Explanation:

Assuming the potential energy is due to the gravitational potential energy, we can use the conservation of energy to find the kinetic energy:

Total energy = Potential energy + Kinetic energy

Kinetic energy = Total energy - Potential energy

Kinetic energy = 300 J - 40 J = 260 J

However, we need to know the mass of the object to convert the kinetic energy to velocity. We can use the potential energy to find the mass:

Potential energy = mgh

40 J = m(9.81 m/s^2)(300 m)

m = 0.137 kg

Now we can use the kinetic energy to find the velocity:

Kinetic energy = (1/2)mv^2

260 J = (1/2)(0.137 kg)v^2

v^2 = (2*260 J) / 0.137 kg

v = 43.3 m/s (rounded to one decimal place)

Therefore, the kinetic energy is 260 J and the velocity of the object when it reaches the ground is 43.3 m/s.

Exposure to a sound of 50,000 Hz at 180 decibels would have severe and potentially life-threatening consequences for a human being. Here's what would happen:

Hearing Damage: The human threshold for pain from sound is typically around 120-130 decibels. Exposure to a sound level of 180 decibels is significantly higher and can cause immediate and irreversible damage to the ears.

Physical Discomfort and Pain: Sound waves at such high intensity can cause intense physical discomfort, pain, and even physical harm. The high pressure variations caused by the sound can lead to damage to delicate tissues.

Tissue Damage: Extremely loud sounds can also cause damage to other parts of the body, not just the ears. The high sound pressure levels can cause physical damage to internal organs, blood vessels, and tissues.

Psychological Impact: Exposure to a sound at such a high volume can be psychologically distressing and traumatic. It can lead to a state of panic, disorientation, and extreme anxiety.

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If a refrigerator operates on average for 10.0 h a day if the power rating of the refrigerator is 700 Watts, then the electrical energy consumed by the refrigerator in one day would be 25200-kilo Joules .

The rate of doing work is known as power. The Si unit of power is the watt.

Power = work / time

As given in the problem If a refrigerator operates on average for 10.0 h a day if the power rating of the refrigerator is 700 Watts,

The electrical energy consumed by = power × time

                                                           = 700 × 10 × 3600

                                                           = 25200000 Joules

                                                           = 25200-kilo Joules

Thus, the electrical energy consumed by the refrigerator would be 25200-kilo Joules.

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Answer:

The other end is called the south pole. When two magnets are brought together, the opposite poles will attract one another, but the like poles will repel one another. This is similar to electric charges.

Explanation:

Answer: A magnet has two ends called poles the answer are the poles

North pole and South pole

Explanation:

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