The resonant frequency of a driven rlcrlc circuit is 1600 hzhz. The resonant frequency is doubled if the resistance rr is doubled
The natural frequency at which a material vibrates with the greatest intensity is called the resonant frequency. The symbol for resonance is typically f0. Resonance is seen in items that are in balance with the forces at work and, in ideal circumstances, could vibrate indefinitely.
A resonant frequency is a natural vibrational frequency in sound applications that is established by the physical characteristics of the vibrating object.
The resonant frequency is advantageous because, in the event of resonance, the oscillation's deflection increases. In acoustics, a greater sound wave amplitude results in greater sound pressure and, thus, a greater volume. For loudspeakers, resonant frequencies are typically undesired.
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What is the distance to the nearest antinode from the fixed end of a guitar string vibrating at its first harmonic?
What is the distance to the nearest antinode from the fixed end of a guitar string vibrating at its first harmonic? /4
What is antinode in a guitar?The wave at every given instant resembles a graph of a sine wave because the antinodes alternate in the wave's displacement direction. The nodes on a guitar string are the locations where harmonics can be produced the greatest, especially at the 12th fret. The sound is muffled by touching the antinodes.
Halfway between the string's anchor points and the node, or between 1/4 and 3/4 of the string's overall length, are the most audible and vibrating points of these harmonics (called antodes).
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The critical path is the sequence of activities that determine the latest date by which the project can be evaluated.
a. true
b. false
The statement given about the critical path is true.
To find the answer, we have to know more about the critical path.
What is critical path?The longest series of tasks in a project plan that must be finished on time for it to be finished by the deadline is known as the critical path. The critical route is the set of actions that, when carried out in a timely manner while taking into account all the aforementioned factors, will take the longest to accomplish the project. Because it is the "red alert" of paths, the critical path is referred to as "critical". Your project won't be successfully completed before the deadline if it doesn't follow the critical path's timing and order.Thus, we can conclude that, the statement given about the critical path is true.
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If you illuminate red paint with pure blue light, what color will that paint appear?
The red paint will appear no colour when it is illuminated with pure blue light.
Why does a red colour appear as red?When visible light of all wavelengths incident on a red coloured object, it absorbs all the wavelengths accept red colour.So it is reflected from its surface and makes the object red.What does happen when red coloured object is illuminated by pure blue light?As the pure blue light has no red coloured wavelength, so the object cannot reflect the red light wavelength. So we will get no reflection from the object.Thus, we can conclude that the red coloured object appears colourless as it is illustrated by pure blue light.
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The two articles you just read contain conflicting conclusions. What questions do you have about the information
presented in the articles? Maybe there's something you would like to know more about before making your own
conclusion. Or perhaps there's an item that was presented as a fact that you would like to investigate. Before you
make your conclusion about human involvement in climate change, list four to five questions that you would like
answered.
The five questions that I would like to be answered concerning human involvement in climate change would be disclosed below.
What is climate change?Climate change is defined as the change that affects the normal atmospheric patterns which is often related to the activities of the human and their environment.
The five questions that I would like to be answered concerning human involvement in climate change include the following:
Is climate change caused by humans? What are the main threats of climate change? How is climate change affecting animals? How is climate change affecting people? How is climate change affecting the ocean?From the definition, climate changes with respect to the activities of human beings. Such activities include the following:
Burning fossil fuels, cutting down forests,Fertilisers containing nitrogen,Fluorinated gases, andIncreased farming of livestock.Learn more about climate change here:
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A positive charge of 94. 0 nc is 22. 0 cm from a negative charge of 53. 0 nc. the force on one of the charges due to the other is approximately________.
A positive charge of 94. 0 NC is 22. 0 cm from a negative charge of 53. 0 NC. The force on one of the charges due to the other is approximately 92.6× 10⁹ N
Force between the two charges depends upon the charges, distance between the charges and the medium between the two charges. It is given by:
F = kq₁q₂ / r²
where q₁ is the charge of the first charge
q₂ is the charge of the second charge
r is the distance between the charges
k is the permitivitty of medium
F is the force between the two charges
Given , q₁ = 94NC
q₂ = 53NC
r = 22cm = 0.22m
On subsituting,
F = 9 × 10⁹ × 94 × 53 / (0.22)²
⇒ F = 92.6 × 10⁹ N
Since, the force between the two charges is equal on both the charges hence, force on one of the charges due to the other is approximately 92.6× 10⁹ N.
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Driving safely at night requires seeing well not only in low light conditions, but also being able to see low contrast
Answer:
True
Explanation:
Driving safely at night requires seeing well not only under low light, but also requires drivers to see low-contrast objects.
Which wavelength of light is the best choice when attempting to quantitatively relate solution absorbance and concentration?.
310 nm
310 nm wavelength of light is the best choice when attempting to quantitatively relate solution absorbance and concentration.
What does beer lambert law state?The Beer-Lambert law states that "the quantity of light absorbed by a substance dissolved in a fully transmitting solvent is directly proportional to the concentration of the substance and the path length of the light through the solution."
Here, the wavelength for absorption is 310 nm. We confirmed that the largest aggregation happens at this wavelength based on the preliminary experiments. Your spectrum measurements may be repeated at a very low concentration. From there, you may deduce the concentration and maximum absorbance at the relevant wavelength.Applications of Beer-Lambert law:Beer-law Lambert's is used to analyze a combination using spectrophotometry without the sample needing to go through a lot of pre-processing. The measurement of bilirubin in blood plasma samples is one example. Since the molar absorbance is known, the spectrum of pure bilirubin is also known.Limitations of Beer-Lambert law:light scattering as a result of sample-related particles. the sample's fluorescence or phosphorescence. refractive index modifications at high analyte concentrations. alterations in chemical equilibrium that occur as a result of concentration.To learn more about Beer-Lambert law visit:
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After an action potential, the opening of additional voltage-gated \text{________} channels and the inactivation of sodium channels, cause the membrane to return to its resting membrane potential.
After an action potential, the opening of voltage-gated potassium channels and Na channels causes the membrane to return to its resting membrane potential.
What is an action potential?An action potential is defined as a difference in electrical charges across the cell membrane due to the unequal distribution of ions.
An action potential is produced by potassium and sodium channels that allow the movement of positive ions across the membrane.
In conclusion, after an action potential, the opening of voltage-gated potassium channels and Na channels causes the membrane to return to its resting membrane potential.
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A capacitor is connected to an ac supply. increasing the frequency of the supply _________ the current through the capacitor
A capacitor is connected to an ac supply. increasing the frequency of the supply increases the current through the capacitor
A capacitor is a device for storing electrical energy that consists of two insulated conductors in close proximity. The parallel-plate capacitor is a simple example of such a storage device.
A capacitor (also known as a condenser) is a two-terminal passive electrical component that stores energy electrostatically in an electric field. Practical capacitors come in a variety of shapes and sizes, but they all have at least two electrical conductors (plates) separated by a dielectric (i.e., insulator).
Capacitors exist in various shapes and sizes, and their value is measured in farads (F). Capacitors are utilized in both alternating current and direct current systems.
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Write an expression for elastic potential energy of a spring?
[tex]\huge\underline{\underline{\boxed{\mathbb {SOLUTION:}}}}[/tex]
[tex]\leadsto[/tex] The elastic potential energy of a spring can be said to be the energy possessed by a spring due to a force that compresses or stretches the spring. This can also be said to be the work which is done by the applied force against the restoring force of the spring, which is stored as the elastic potential energy.
The elastic potential of a spring can be expressed as:
▪ [tex]\longrightarrow \sf{PE= \: \dfrac{1}{2} kx}[/tex]
[tex]\huge\underline{\underline{\boxed{\mathbb {ANSWER:}}}}[/tex]
[tex] \bm{PE= \: \dfrac{1}{2} kx}[/tex]
write the factors of which affect pressure
Answer:
They are:
1. Height of liquid
2. Density of liquid
3. Acceleration due to gravity
The overall dimming of starlight passing through dust clouds is called?
The overall dimming of starlight passing through dust clouds is Extinction .
To find the answer, we need to know more about the Extinction.
What is Extinction ?Extinction is the electromagnetic radiation that is absorbed and scattered by gas and dust between an emitting astronomical object and the observer. Robert Julius Trumpler first identified interstellar extinction around 1930. However, Friedrich Georg Wilhelm von Struve had identified its effects in 1847, and a number of people had seen its impact on star colors but had not made the connection between it and the general abundance of galactic dust. Extinction in the visual band of frequencies (photometric system) for stars in the Milky Way plane and within a few thousand parsecs of the Earth is approximately 1.8 magnitudes per kiloparsec.Thus, we can conclude that, the overall dimming of starlight passing through dust clouds is Extinction .
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The resistance of platinum thermometer is 5.7 5.5, 5.2 at boiling point,
unknown temperature, θ, and at the freezing point of water respectively.
Determine the unknown temperature in θ°C.
The unknown temperature is 64°C
Given,
Resistance at ice point,R[tex]_{0}[/tex] =5.2Ω,
Resistance at steam point,R[tex]_{100}[/tex] = 5.7Ω,
Resistance when dip in unknow, R[tex]_{t}[/tex] = 5.5Ω,
R[tex]_{100}[/tex] = R[tex]_{0}[/tex] (1+α100)
α = R[tex]_{100}[/tex]-R[tex]_{0}[/tex] / R[tex]_{0}[/tex]×100
α = 0.00096 = 9×[tex]10^{-4}[/tex]°C[tex]^{-1}[/tex]
Let the temperature of hot bath = t°C
R[tex]_{t}[/tex] = R[tex]_{0}[/tex](1+αt)
t = R[tex]_{t}[/tex]- R[tex]_{0}[/tex] / R[tex]_{0}[/tex] α
t = 0.3 / 0.00468
t = 64°C
The unknown temperature is 64°C.
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A string with mass density equal to 0. 0025 kg/m is fixed at both ends and at a tension of 290 n. resonant frequencies are found at 558 hz and the next one at 744 hz. what is the length of the wire?
A string with mass density equal to 0. 0025 kg/m is fixed at both ends and at a tension of 290 n. Resonant frequencies are found at 558 Hz and the next one at 744 Hz. The length of the wire will be L = 0.91 m
A resonant frequency of a string is its natural frequency of a standing wave that is produced in it. The standing waves in the string are called harmonics. A string of a fixed length can have many standing waves. The frequencies of these standing waves are called resonant frequencies.
frequency = 1 / 2L ([tex]\sqrt{\frac{T}{mu} }[/tex])
L = length of the spring
T = Tension
fundamental frequency = 744 - 558 = 186 Hz
186 = 1/2(L) ([tex]\sqrt{\frac{290}{0. 0025 } }[/tex])
L = 340 / (186 * 2)
L = 0.91 m
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When the atmosphere becomes loaded with particles, only the _____ wavelengths are able to penetrate the atmosphere.
Visible light are able to penetrate the atmosphere
What is Wavelength?A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in the consecutive cycles. This length is often defined in wireless systems in metres (m), centimetres (cm), or millimetres (mm).
The electromagnetic spectrum is made up of a variety of electromagnetic radiations, including radio waves, microwaves, infrared light, visible light, ultraviolet light, X-rays, and gamma rays. Because the earth's atmosphere blocks off the majority of the electromagnetic spectrum's wavelengths, most electromagnetic energy from space cannot reach the planet's surface.
. A portion of the electromagnetic spectrum that humans can see with our eyes is the visible light or spectrum. The electromagnetic spectrum's band that can most easily reach Earth's surface is also this one.
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How many minutes will it take to plate out 16. 22 g of al metal from a solution of al 3 using a current of 12. 9 amps in an electrolytic cell?
It will take 103 minutes to plate out 16. 22 g of al metal from a solution of al 3 using a current of 12. 9 amps in an electrolytic cell
Electrolytic cell, any device in which electrical energy is converted to chemical energy, or vice versa. Such a cell typically consists of two metallic or electronic conductors (electrodes) held apart from each other and in contact with an electrolyte (q.v.), usually a dissolved or fused ionic compound
First, look at the reaction to decided how many moles of electrons it will take:
Al3+ + 3e ------> Al(s)
It takes 3 electrons to convert 1 mole of Al3+
Next, figure out how many moles of Al metal you want:
I mole of Al mass = 26 g
1 g of Al will have = 1/26 moles
16. 22 g of al metal will have = 16.22 / 26 moles 0.624 moles
since , their are 3 electrons
0.624 x 3= 1.87 moles of electrons
using Faraday constant to find the number of coulombs (C) needed:
1 faraday = 96500 C per mole
1.87 x 96500 = 180455
Since, 1 amp = 1 C/sec,, time needed to supply a current of 12.9 amp will be
80455C / 12.9 C = 6236.82 sec = 103 minutes
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21. A person standing 49.5m from the foot of a cliff claps his hands and hears an echo 0.3
seconds later. Calculate the velocity of the sound in air
Answer:
330 m/s
Explanation:
The sound wave has to travel TO the cliff AND back = 2 * 49.5 = 99 m
magnitude of velocity = distance / time = 99m / .3 s = 330 m/s
The schematic diagram below shows an induction cooktop being used to heat water in a steel pan.
Which of the following best explains how the water is heated?
A
The ceramic top plate heats up as the magnetic field transfers heat energy directly to the top plate. The pan and water are then heated by conduction.
B
The current from the coil is transferred by means of the magnetic field to the pan. The pan then induces a current in the water, which heats due to resistance.
C
The copper coil heats up as it resists the electric current. This heat is then transferred by convection through the ceramic cooktop and pan to the water.
D
The steel pan heats up as it resists the induced movement of electrons caused by the changing magnetic field. The water is heated by conduction.
The water is heated as the current from the coil is transferred by means of the magnetic field to the pan. The pan then induces a current in the water, which heats due to resistance. That is option B.
What is cooking by induction?Induction cooking is referred to the transfer of heat energy from one source to another through a magnetic field that helps in the movement of electrons.
Heat cannot be transferred to the water without changes of the magnetic field.
Other examples of how heat is being transferred to other body surfaces include the following:
Convention,Conduction,Evaporation and Radiation.Therefore, the diagram above displays the heat transfer from the copper coil carrying current to the water in the steel pan is by induction.
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The energy of a photon of red light is ____ the energy of a photon of blue light
A photon's energy and wavelength are inversely related. Since the wavelength of photons of blue light is less than photons of red light, it contains more energy than red photons.
Wavelengths of blue light are shorter, ranging from 450 to 495 nanometers. Red light has wavelengths that range from 620 to 750 nm and longer waves. Compared to red light, blue light has a greater frequency and more energy.
A photon's energy varies with its wavelength; those with longer wavelengths have less energy than those with shorter ones. For instance, red photons are less energetic than blue ones.
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Assuming a mass of 0.04-g, what is the power exerted by the electrical forces on a fragment of fiber if the fragment has a velocity of 200 mm/s, 10 ms after ejection?
8.0× 10⁻⁵ Watts is the power exerted
What is Power, Energy and Work done?Physics' three essential notions are work, energy, and power. When a force (push or pull) given to an item results in the displacement of the object, that force is said to have performed work. Energy is how we describe the ability to perform the task. Power is the amount of work completed in a given amount of time.
mass of the body = 0.04 g = 4.0 × 10^-5 kg
velocity of the body = 200mm/s = 0.2 m/s
Kinetic energy of the body = 1/2 × 4.0 × 10^-5 × 0.2^2
Kinetic energy of the body = 8.0× 10^-7
Thus, work done = 8.0× 10^-7 J
Power = work done/ time
Power exerted = 8.0× 10^-7/0.01
Power exerted = 8.0× 10^-5 Watts
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According to current scientific understanding, the idea that the milky way galaxy might be home to a civilization millions of years more advanced than ours is.
According to contemporary scientific understanding, the thought that the Milky Way Galaxy energy is home to a civilization millions of years more developed than ours is. one reasonable solution to Fermi's paradox.
What is the milky way galaxy?Our Milky Way galaxy is simply one of the billions of galaxies in the universe. Within it, there are at smallest 100 billion stars, and on moderate, each star contains at least one planet circling it. This means there are potentially thousands of planetary procedures like our solar system within the galaxy!The Milky Way gets its name from a Greek myth about the goddess Hera who sprayed milk across the sky. In other parts of the world, our galaxy goes by different names.The Milky Way is about we look. Up, down, left, right, that is the Milky Way. From Earth, it can be noticed as a hazy form of stars in the evening sky that the stripped eye can barely notice. You can visit the Milky Way all year, no matter where you are on the earth.To learn more about Milky Way galaxy, refer to:
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What is the maximum number of grams of fat recommended on a 2000-kcalorie diet based on the daily value?
a. 34
b. 45
c. 78
d. 56
e. 67
The maximum number of grams of fat recommended on a 2000-kcalorie diet based on the daily value is around 65 grams,therefore option (e)
The term "daily value" (DV) describes how much of a nutrient you should eat daily based on a diet of 2,000 calories.On the FDA website, you may obtain the daily values for a variety of nutrients. In order to meet the average adult's energy requirements, the FDA picked 2,000 calories.Fat intake must be kept to a minimum. A 2,000 calorie diet per day should contain no more than 65 grammes of total fat, 20 grammes or less of saturated fat, and trace levels of trans fat. Trans fats are bad because they narrow our arteries, increasing our risk of coronary heart disease.Learn more about daily value from here:https://brainly.com/question/23095932
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A ball is dropped from a height of 6ft. whenever it hits the ground it bounces back to half its original height. what is the total distance the ball travels dropping and rebounding?
The ball has travelled a total distance of 18 feet after dropping and rebounding.
After being dropped for the first time, the ball will rebound to a height of 3 feet as it returns to half its original height. The geometric series formed by the total distance travelled while falling and rebounding has a common ratio,
r = 0.5
6 ft + 3 ft = 9 ft will be the first term in the series
For the sum formula S = [tex]\frac{a}{1-r}[/tex],
substitute a = 9 and r = 0.5 to get the ball's total distance travelled.
S = [tex]\frac{9}{1-0.5}[/tex]
S = [tex]} \frac{9}{0.5}[/tex]
S = 18
The ball has therefore travelled a total of 18 feet.
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PLEASE ANSWER ASAP!
Lai is trying to listen to a radio station for weather updates during a storm. The storm is causing electrical interference that affects radio waves. She knows that the weather station broadcasts both an analog and a digital radio signal.
Which signal would most likely be clearer during this storm, and how do you know?
(Choice A)
The analog signal because it can always be heard even when interference is high.
(Choice B)
The analog signal because interference can be filtered out of the signal.
(Choice C)
The digital signal because it can always be heard even when interference is high.
(Choice D)
The digital signal because interference can be filtered out of the signal.
The digital signal can always be always be heard even when interference is high. Option D
What is a radio signal?A radio signal makes use of the radio waves. The radio waves are long wavelength electromagnetic waves which are able to travel across a long distance. The signal can be transmitted in both analogue and digital formats.
However, the digital signal seems to be free from certain interferences that are caused by the scattering of the waves across distances. This could diminish the quality of sound that is heard.
Thus, the digital signal can always be always be heard even when interference is high.
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For a 1 efficient step down transformer voltage in primary and secondary are equal current in primary and secondary are equal input power is same as the output power output power is zero
The given condition for a 100% efficient step down transformer is not true.
How do Step-down Transformers work?Because there are fewer turns in the secondary winding of a step-down transformer, the secondary voltage is lower than the initial voltage. As a result, this kind of transformer is employed to reduce the voltage to the levels intended for the circuit. Almost all power supply incorporate a step-down transformer to keep the operating voltage range of the circuit within acceptable limits. Electronic transformers and distribution systems are often where these transformers are installed (power transformers).
What Does a Step-Down Transformer Mean by Power?Using the system voltage and current, we can calculate the power of a transformer. Volt-Amps, or VA, is the unit used to measure the power in a transformer (for larger transformers Kilo Volt-Amps, kVA).
Any transformer should, in theory, have constant power on both sides, which implies that the power available on the secondary side of the transformer should match the power available on the primary side. This also applies to step-down transformers. A step-down transformer's secondary side has a lower voltage than its primary side, hence in order to balance the transformer's total power, the secondary current would need to be increased.
What is the Step-Down Transformer's Relationship Between Voltage and Current?In a step-down transformer, the output current is greater than the input current while the output voltage is lower than the primary voltage.
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What must be done to the refrigerant that is vented off the top when filling a charging cylinder?
When transporting cylinders contain used refrigerant?
The DOT mandates that DOT Classification Tags, such as those shown above, be attached to cylinders that contain used refrigerant. DOT classification tags show the substance's level of hazard and are arranged according to class. For instance, Class 2, which is gases, would include refrigerant gases.What must be done before shipping any used refrigerant in a cylinder?
Check that the cylinder complies with DOT requirements before sending any old refrigerant cylinders, fill out the shipping paperwork with the quantity of each refrigerant, and clearly mark the cylinder with the kind and amount of refrigerant. Transporting cylinders should be done standing up.Learn more about refrigerant of cylinder
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What is the momentum of a tiger that has a mass of 81 kg and runs with a velocity of 5. 4 m/s to the east? (1 point)
The momentum of a tiger that has a mass of 81 kg and runs with a velocity of 5. 4 m/s to the east will be 437.4 Kg m/s in east direction.
Momentum is a property of a moving body that the body has by virtue of its mass and motion and that is equal to the product of the body's mass and velocity broadly .It is a property of a moving body that determines the length of time required to bring it to rest when under the action of a constant force.
momentum = mass * velocity
given
mass of tiger = 81 kg
velocity of tiger = 5.4 m/s
since ,
momentum = m * v
= 81 * 5.4 = 437.4 Kg m/s
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The distance covered by a car moving with a speed of 36 km/h in 15m is (a) 0.9 km (b) 9.0 km (C) 90 km (d) 900 km
Speed of a car = 36 km/h
Time taken = 15 minutes
Converting the time into hour:-
= 15/60 hours
= 1/4 hours
As we know that,
Distance = Speed × Time= (36 × 1/4) kilometres
= 9 kilometres
Hence the distance covered is 9 kilometres.
Option b) 9.0 kmThis is a uniform rectilinear motion exercise.
To start solving this exercise, we obtain the following data:
Data:v = 36 km/hd = ¿?t = 15 min = 0.25 hrMinutes to hour converter
60 min = 1 hour
[tex]\boldsymbol{\sf15\not{min}*\dfrac{1 \ hr}{60 \not{min}}=0.25 \ hr }}[/tex]
To calculate distance, speed is multiplied by time.
We apply the following formula: d = v * t
We substitute our data into the formula:
[tex]\boldsymbol{\sf{d=v*t}}[/tex]
[tex]\boldsymbol{\sf{d=36 \dfrac{km}{\not{h}}*0.25 \not{h} }}[/tex]
[tex]\boldsymbol{\sf{d=9 \ km}}[/tex]
The distance traveled by a car moving with a speed of 36 km/h in 15 m is 9 km.
Therefore, the correct option is "B".We know that an electric field contains energy. What causes the electric field itself?
A
electrical charges on one or more particles within the field
B
the combined mass of all particles in the field
C
the degree of magnitization of particles within the field
D
No-one really knows, the field is just always there.
Electrical charges on one or more particles within the field cause the electric field
Each point in space has an electric field associated with it when a charge of any kind is present. The value of E, often known as the electric field strength, electric field intensity, or just the electric field, expresses the strength and direction of the electric field
A region of space surrounding an electrically charged particle or object known as an electric field is one in which an electric charge would experience force. A vector quantity called an electric field can be represented by arrows pointing in the direction of or away from charges. The force per unit charge exerted on a positive test charge that is at rest at a given position is the force per unit charge that is used to define the electric field analytically.
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If a radioactive decay produced 2. 05 × 1011 j of energy, how much mass was lost in the reaction?
The mass lost in the reaction is 0.227 × [tex]10^{-5}[/tex] Kg
The energy that is released during a nuclear reaction can be related to the mass lost using the Einstein equation.
E = m[tex]c^{2}[/tex] by Einstein demonstrates that matter and energy are only two different manifestations of the same thing. It also demonstrates how much energy (E) can fit into a relatively small mass (m) of matter. Nuclear processes convert matter into energy, yet the combined amount of mass and energy remains constant.
Given that;
E = Δ[tex]mc^{2}[/tex]
Δm = [tex]\frac{ E}{c^{2} }[/tex]
Δm = 2. 05 × 10^11 J/( 3 × 10^8)^2
Δm = 0.227 × [tex]10^{-5}[/tex] Kg
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