The unit of the quotient of inductance and resistance will be Henry and ohm
Inductance is the tendency of an electrical conductor to oppose a change in the electric current flowing through it. The flow of electric current creates a magnetic field around the conductor. The field strength depends on the magnitude of the current, and follows any changes in current.
Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who studied the relationship between voltage, current and resistance.
unit of quotient of inductance = henry (H)
unit of resistance = ohm
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A yellow train of mass 100 kg is moving at 8 m/s toward an orange train of mass 200 kg traveling in the opposite direction on the same trac at a speed of 1 m/s. They collide and stick together! What is the velocity of
the new combined train?
A. 8 m/s
B. 2 m/s
C. 4 m/s
D. 10 m/s
Answer:
B. 2 m/s
Explanation:
With all collisions, momentum is conserved. This is known as the Conservation of Momentum.
To find the momentum of an object, multiply its mass by its velocity.
[tex]m_yv_y+m_ov_o=(m_y+m_o)v_f[/tex], solving for vf
Plugging in numbers, we get:
[tex]100\cdot 8 + 200(-1)=(100+200)v_f[/tex]
[tex]300v_f=600,\\v_f=\boxed{2\text{ m/s}}[/tex]
What must you do at a flashing red light? * 1 point slow down and proceed with caution be ready for a traffic light ahead stop and wait until the light stops flashing stop and proceed only when clear
Stop and wait until the light stops flashing stop and proceed only when clear.
Flashing Red - A flashing red traffic signal light means "STOP." After stopping, you may proceed when it is safe.
How must you react to a flashing red traffic light?
Flashing Red: If the traffic signal is flashing red, treat it as a stop sign and come to a complete stop at the intersection. Look carefully in all directions before proceeding. Other directions may have a different type of signal indication.What must a driver do at a flashing yellow light ?
A flashing yellow light warns drivers to slow down and proceed with caution. Drivers may turn left on a green light. However, drivers must yield the right-of-way if other traffic is approaching from the opposite direction.Learn more about traffic lights
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If the current through an inductor were doubled, the energy stored in the inductor would be.
Answer:
The energy stored in an inductor is given as:
EL=1/2 LI ²
So, when the current is doubled, the energy stored in the inductor will become 4 times.
Two forces produce the same torque. does it follow that they have the same magnitude?
Two forces produce the same torque but this will not ensure that they have the same magnitude of torque because torque is the product of force times distance.
Torque is a measure of the force that can cause an object to rotate about an axis. Just as force is what causes an object to accelerate in linear kinematics, torque is what causes an object to acquire angular acceleration. Torque is a vector quantity.
The physical quantities for which both magnitude and direction are defined distinctly are known as vector quantities. For example, a boy is riding a bike with a velocity of 30 km/hr in a north-east direction.
The quantity torque (or moment of force) may be thought of as the cross product of force and distance and the SI unit for torque is Newton metre, N m (m2 kg s-2).
No, Because torque is the product of force times distance, two different forces that act at different distances could still give the same torque.
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prove that acceleration due to gravity is independent to the mass of falling object.
Answer:
The value of acceleration due to gravity is independent of mass of the body.
Explanation:
Let us consider the mass of the object as m and mass of earth as M
Therefore, force between the object and earth would be given by: F = GMm/d²
This force is equal to the weight of the object, i.e. mg
Thus;
mg = GMm/d²
g = GM/d²
Therefore, the value of acceleration due to gravity is independent of mass of the body.
2. A rectangular block of weight 300N measures 0.1 m by 0.4 m by 1.5 m.
a) Draw a diagram to show how the block must rest to exert the maximum pressure on the ground. Calculate this
pressure.
b) Draw another diagram showing the position of minimum pressure. Calculate this pressure.
Answer:
that's all I could do.hope it helps.
Give one example of a thermodynamic cycle that does not account for the carnot efficiency.
Thermo-Electrochemical converter (UTEC) is a thermodynamic cycle that does not account for the Carnot Efficiency.
The Carnot cycle is a hypothetical cycle that takes no account of entropy generation. It is assumed that the heat source and heat sink have perfect heat transfer. The working fluid also remains in the same phase, as opposed to the Rankine cycle, in which the fluid changes phase. A practical thermodynamic cycle, such as the Rankine cycle, would achieve at most 50% of the Carnot cycle efficiency under similar heat source and heat sink temperatures.
What is Thermo-Electrochemical converter?In a two-cell structure, a thermo-electrochemical converter converts potential energy difference during hydrogen oxidation and reduction to heat energy.
It employs the Ericsson cycle, which is less efficient than the Carnot cycle. In a closed system, it converts heat to electrical energy. There are no external input or output devices.
This means there will be no mechanical work to be done, as well as no exhaust. As a result, Carnot efficiency is not taken into account in this cycle. Carnot efficiency is accounted for by other options such as turbine and engine.
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Give one example of a thermodynamic cycle that does not account for the carnot efficiency.
Thermo-Electrochemical converter (UTEC) is a thermodynamic cycle that does not account for the Carnot Efficiency.
What is Thermo-Electrochemical converter ?Thermo-Electrochemical converter converts potential energy difference during oxidation and reduction of hydrogen in two cell structure to heat energy.
It uses Ericsson cycle which has less efficiency compared to Carnot cycle efficiency. It converts heat into electrical energy in a closed system. There is no external input and output.This means there is no mechanical work to be done and also there will not be any exhaust. So, Carnot efficiency is not accounted in this cycle. The other options like turbine and engine accounts for Carnot efficiency.Learn more about Thermo-Electrochemical converter here:
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Biomes on Earth have exhibited changes throughout history that have been caused by a variety of factors. Over the past 50 years, the amount of tropical rainforest acreage found throughout the world has decreased from 14.8 billion acres to 8.6 billion acres due to deforestation. What factor is likely most responsible for the changes observed in the world’s rainforests?
a.
volcanic activity
b.
human activity
c.
temperature changes
d.
solar eclipses
Please select the best answer from the choices provided
A
B
C
D
Please Help!!!
Which statement best describes the types of bonds shown in the diagram?
an ionic bond; a hydrogen ion is bonding with a chlorine atom
a covalent bond; the hydrogen atom’s single electron is being shared with the chlorine atom
a covalent bond; the hydrogen atom’s two electrons are being shared with the chlorine atom
an ionic bond; the hydrogen chloride molecule has an electrical charge
Answer: B
Explanation:
The statement that best describes the types of bonds shown in the diagram is a covalent bond; the hydrogen atom’s single electron is being shared with the chlorine atom, therefore the correct answer is the option B
What is a covalent bond?When two similar or dissimilar atoms form bonds with each other by sharing their valence electron the bond is known as the covalent bond.
The ionic bond is the result of the transfer of the electrons
Ionic bonds are formed between the pair of one electronegative atom and an electropositive atom.
As shown in the diagram there is sharing of the electrons between the hydrogen and the chlorine atom, and we know that covalent bonds are formed by the sharing of the electrons
Since the diagram's covalent bonds are best described by the statement that the hydrogen atom's single electron is shared with the chlorine atom, option B is the right response.
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A 0. 20-kg ball is attached to a vertical spring. the spring constant is 28 n/m. when released from rest, how far does the ball fall before being brought to a momentary stop by the spring?
A 0. 20-kg ball is attached to a vertical spring. The spring constant is 28 n/m. when released from rest, the ball will fall at a distance of x = 0.14 m before being brought to a momentary stop by the spring.
The spring constant is the force needed to stretch or compress a spring, divided by the distance that the spring gets longer or shorter. It's used to determine stability or instability in a spring
Elastic potential energy is Potential energy stored as a result of deformation of an elastic object, such as the stretching of a spring. It is equal to the work done to stretch the spring, which depends upon the spring constant k as well as the distance stretched.
When ball is released from rest with spring , it will loose some potential energy . Hence , loss in potential energy of the ball = gain in potential energy of spring
m*g*x = 1/2 * k * [tex]x^{2}[/tex]
0.20 * 9.8 * x = 1/2 * 28 * [tex]x^{2}[/tex]
x = (2 * 0.20 * 9.8) / 28
x = 0.14 m
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The astronomer who first worked out the mathematical description of black hole event horizons was?
Karl Schwarzschild devised the first general relativity model that would adequately describe a black hole in 1916.
What is Black Hole?
A black hole is an area of spacetime with such intense gravitational pull that nothing can escape from it, not even light or other electromagnetic waves. According to general relativity theory, a compact enough mass can bend spacetime into a black hole. The event horizon is the line beyond which there is no escape.
Black holes were once thought to be a mathematical curiosity, but theoretical research in the 1960s revealed that they were actually a general prediction of general relativity.
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A particle (m = 3. 5 × 10-28 kg) starting from rest, experiences an acceleration of 2. 4 × 107 m/s2 for 5. 0 s. what is its de broglie wavelength λ at the end of this period?
The de Broglie wavelength of the particle is 1.578*10^-3nm.
To find the answer, we have to know about the de Broglie wavelength.
How to find the de Broglie wavelength?We have the expression for de Broglie wavelength as,[tex]wavelength=\frac{h}{P} =\frac{h}{mv}[/tex]
where, h is the plank's constant, m is the mass and v is the velocity.
It is given that,[tex]m=3.5*10^{-28}kg\\a=2.4*10^7m/s^2\\t=5s\\h=6.63*10^{-34}Js[/tex]
Substituting the values, we get,[tex]wavelength=\frac{6.63*10^{-34}}{3.5*10^{-28}*2.4*10^7*5}=1.578*10^{-14}m\\\\ wavelength=1.578*10^{-3}nm.[/tex]
Thus, we can conclude that, the de Broglie wavelength of the particle is 1.578*10^-3nm.
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The _ states that the forces that are changing Earth's surface today are the same forces that changed Earth's surface in the past
The uniformitarianism states that the forces that are changing Earth's surface today are the same forces that changed Earth's surface in the past as a result of the same types of agents being present all along.
What is uniformitarianism?This type of doctrine talks about how the earth's geologic processes are the same as a result of the agents of weathering such as glacier, wind etc being the same in this type of scenario.
Weathering is referred to the process in which rocks are broken down into smaller particles to form soil. The agents of weathering has been the same today and in the past which makes it constant.
This is therefore the reason why Uniformitarianism was chosen as the most appropriate choice.
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Which element of the security policy framework offers suggestions rather than mandatory actions?
The element Guideline of the security policy framework offers suggestions rather than mandatory actions.
To find the answer, we have to know more about the security policy framework.
What is security policy framework?Any rule or policy's guidelines refer to some crucial details that help people understand the regulations. If there are no rules for something, nobody will be aware of that specific thing. The answer to the inquiry regarding the term that is the framework and capable of providing the details for any policy is guideline.Thus, we can conclude that, the element Guideline of the security policy framework offers suggestions rather than mandatory actions.
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A tensile-reinforced t beam is to be designed to carry a uniformly distributed load on a 20-ftsimple span. The total moment to be carried is mu-5780 in-kips. Concrete dimensions, governed by web shear and clearance requirements, are b 20 in, b 10 in, he-5in, and d 20 in. Iffy 60 ksi and fe-4ksi, what tensile reinforcement is required at midspan? select appropriate reinforcement to provide this area of steel and check concrete cover limitations, assuming no. 3 stirrups. What total depth h is required? sketch your design.
Tension reinforced section is when you have steel reinforcement (rebar) on the tension controlled region where the rebar is used to counteract the lack of tensile strength in concrete. When reinforcement is only present in the tension zone, you have a singly reinforced beam.
What is beam light?The light traveling in any one direction in a straight line is named a ray of light. A group of light rays given out from a headwater is called a beam of light. The torch sends out a powerful beam of light. The sun's gravitation was turning the beam of light. A single beam of light emitted from the lighthouse. The clouds parted and a beam of light fell on the field.Laser represents “light amplification by stimulated emission of radiation”. A laser is an object that delivers beams of light that can travel very long distances. Such beams are so emphatic that they can be cut via a diamond, the hardest material in the globe.To learn more about beam light, refer to:
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What is the mass of an object that experiences a gravitational force of 685 n near earth's surface where g = 9.80 m/s2?
The mass of an object that experiences a gravitational force of 685 N near earth's surface where g = 9.80 m/s² is 98.89 kg.
What is gravitational force?Any two mass-containing objects are attracted to one another by the gravitational force. Because it consistently attempts to pull masses together rather than pushing them apart, the gravitational force is known as attractive.
In reality, everything in the cosmos is tugging on everything else, including you!
According to the question,
The gravitational force of 685 N near earth's surface.
The acceleration due to gravity is g = 9.80 m/s².
The formula for force acting of the body under the influence of gravitation is ;
Force = mass×acceleration
Substitute the given values;
685 = m×9.8
m = 685/9.8
m = 69.89 kg.
Therefore, mass of an object is 69.89 kg.
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Alaskan natives often eat whale blubber while other groups of people typically do not. this is an example of __________. a. food variety b. stress c. palpability d. learned preferences please select the best answer from the choices provided a b c d
Alaskan Natives often eat whale blubber while other groups of people typically do not. (d)This is an example of learned preferences.
What are Learning Preferences?
Learning styles can be defined as the way in which an individual generally responds to specific learning situations and prefers to process different forms of information. Often, learning styles are regarded as the preferred methods for undertaking learning, for example, reader/writer, audio/visual etc., but this is a narrow definition. Learning preferences as a term is generally considered to take in a broader set of factors than just methods as they also take into account aspects that might impact on learning, such as: the environment and where and when students prefer to do their learning. For example, a student may prefer to work alone at home, and do her assignments late in the evening when the family has gone to bed. Another student may thrive in group situations and only wish to study during the day on-campus. In a nutshell, learning styles and preferences help to describe how people learn best in their context, and are useful in raising awareness about this.To learn more about Learning Preferences: https://brainly.com/question/2289046
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A capacitor is connected across an ac source. Suppose the frequency of the source is doubled. What happens to the capacitive reactance of the inductor?.
The capacitive reactance is reduced by a factor of 2.
Calculation:We know the capacitive reactance is given as,
[tex]Xc = \frac{1}{2\pi fC}[/tex]
where,
[tex]Xc[/tex] = capacitive reactance
f = frequency
C = capacitance
It is given that frequency is doubled, i.e.,
f' = 2f
To find,
[tex]Xc'[/tex] =?
[tex]Xc' = \frac{1}{2\pi f'C}[/tex]
[tex]= \frac{1}{2\pi 2f C}[/tex]
[tex]= \frac{1}{2} (\frac{1}{2\pi fC} )[/tex]
[tex]Xc'[/tex] [tex]= \frac{1}{2} Xc[/tex]
Therefore, the capacitive reactance is reduced by a factor of 2.
I understand the question you are looking for is this:
A capacitor is connected across an AC source. Suppose the frequency of the source is doubled. What happens to the capacitive reactant of the inductor?
The capacitive reactance is doubled.The capacitive reactance is traduced by a factor of 4.The capacitive reactance remains constant.The capacitive reactance is quadrupled.The capacitive reactance is reduced by a factor of 2.Learn more about capacitive reactance here:
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Suppose that this year a small country has a gdp of $100 billion. also assume that ig = $30 billion, c = $60 billion, and xn = − $10 billion. what is the value of g?
The government expenditure is $20 billion.
To find the answer, we have to know about the Gross Domestic Product.
How to find the government expenditure?The value of all the finished goods and services produced in an economy over the course of a year is determined by the gross domestic product, a macroeconomic metric Gross Domestic Product.Using the output approach, the gross domestic product is determined as follows:
[tex]GDP=C+I_g+G+X_n[/tex]
Where: C is conception, Ig is the gross investment, G is government expenditure, and Xn is the net exports.
Thus, the value of G is,[tex]G=GDP-C-I_g-X_n\\G=100-60-30+10=20 billion-dollers.[/tex]
Thus, we can conclude that, the government expenditure is $20 billion.
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An object is dropped from the top of a building and is observed to take 7. 2s to hit the ground. How tall is the building?.
_______________
v₀=0 m/s
H₀=0 m
g=10 m/s²
t=7,2 s
_______________
H - ?
_______________
[tex]\displaystyle \boldsymbol{H}=H_0+v_0t+\frac{gt^2}{2}=0 \; m+0\; m/s\cdot 7,2\; s+\frac{10\; m/s^2\cdot (7,2 \;s)^2}{2} =\boldsymbol{36\; m}[/tex]
If your heart is beating at 76. 0 beats per minute, what is the frequency of your heart's oscillations in hertz?
If the heart is beating at 76. 0 beats per minute, the Frequency of heart's oscillations in hertz is 1.25 Hertz.
The Frequency is defined as the number of oscillations completed in 1s.
Our heart beats continuously giving rise to the frequency of the heart.
Measuring frequency would be possible if we measure the time in seconds.
75 beats per minute means that 75 beats occur in 60s.
Frequency = Number of beats / Total time taken
Frequency = 75 / 60
Frequency = 1.25 Hz
Hence, number of beats per second is 1.25 Beats.
Beats per second or Cycles per second is same as the frequency of oscillation called as Hertz (Hz)
Hence, frequency of the heart oscillation is 1.25 Hertz (Hz).
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How does the average speed of light in glass compared with its speed in a vacuum?
In comparison to a vacuum, the speed of light in glass is 1.52 times slower.
To find the answer, we need to know more about the refractive index.
How the average speed of light in glass compared with that in vacuum?Where n is the medium's refractive index, which is a constant value greater than 1.0, and c is the speed of light in a vacuum, we may calculate the speed of light in any medium.We can infer from the formula that light slows down as it passes through a material.Particularly, the index of refraction for glass is n = 1.52.This implies that the speed of light is 1.52 times slower in glass than in a vacuum.
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What is the wavelength of a photon that has the same momentum as an electron moving with a speed of 1500 m/s? express your answer using two significant figures
The wavelength of photon in 2 significant is 4.8 × 10∧3 angstrom
Given: Mass of photon= Mass of electron= 9.11×10^-31 kg
Velocity= 1500m/s
Planck constant(h)= 6.6261*10^-34 Js
λ= h/mv= 6.6261*10^-34 Js/(9.11×10^-31× 1500)kgm/s
= 4.8 × 10^3 angstrom
About De-brogile wavelength:
De Broglie stated that every particle could be described as having a particular wavelength and formulated the famous de Broglie equation.
De Broglie asserts that a beam of particles with a certain mass can act like a matter wave. The particle's mass and velocity are related to its wavelength:
λ= h/mv, where,
m is the particle's mass.v represents the particle's speed.The Planck constant, or h, has a value of 6.6261*10^-34 Js.Learn more about wavelength here:
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A research team designed a new personality test to measure how extroverted or introverted someone is. what should they do to test the validity of their questionnaire?
The research team should compare all their test results along with other kinds of similar personality tests to know if they will have similar type of results.
What is the personality test known as?It is known to be Myers-Briggs Personality Type Indicator and this is said to be a kind of a self-report inventory that is made to know a person's personality type, along with their strengths, and preferences.
Note that the questionnaire was made or created by Isabel Myers along with her mother Katherine Briggs and it is one that is based on their work with the use of Carl Jung's theory of personality types.
Hence, The research team should compare all their test results along with other kinds of similar personality tests to know if they will have similar type of results.
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What is the magnitude of the detected sound frequency shift from 170 hz during the projectile flight when a ball is thrown up in the air? a
The sound frequency shift's magnitude, or change in frequency, first decreases to zero before rising during the projectile flight when a ball is thrown up in the air
At this point, the frequency emitted by the source becomes equal to that received by the microphone. This can be seen from the equation 2 for Doppler effect contained in the attachment below.This moment is short lives and the projectile soon starts a return journey downward under the influence of gravity. The velocity of the projectile is negative ( v < 0 ) and from the equation can be confirmed that the frequency received by the microphone increases as the projectile fall under gravity. This is so because as the projectile falls downward it velocity becomes more and more negative. And from the equivalent in the picture below, the frequency received by the microphone increasesLearn more about sound frequency shift from:https://brainly.com/question/15743506
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What is the focal length (in meters) of a lens whose radius of curvature is 9. 2 m and has a refractive index 1. 2?
The focal length (in meters) of a lens whose radius of curvature is 9. 2 m and has a refractive index 1.2 will be 18.4 m
The focal length of a lens is determined when the lens is focused at infinity. Lens focal length tells us the angle of view—how much of the scene will be captured—and the magnification—how large individual elements will be.
Focal length of a lens is the distance between center of lens and focal point . Focal point is a point on principal axis , at which light rays parallel to principal axis meet after refraction through lens or seem to meet after refraction .
The radius of curvature is the radius of sphere formed by the convex or concave mirror. It is also equal to the distance between the pole and center of curvature. The sign convention for focal length and radius of curvature is the same.
focal length = 2 * radius of curvature
given
radius of curvature = 9.2 m
focal length = 2 * 9.2
= 18.4 m
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Using the formula for the resonant frequency, find the resonant frequency of a lcr circuit with l = 1 mh, c = 560 pf?
For LCR circuit, the Resonant frequency is 212.68kHz.
Given LCR circuit has L= 1 mH, C= 560pf
f=1/{2*22\7*√[1×10^(-3)H]*√[56*10^(-12)F]
f=212.68kHz
About Resonance frequency:
Equation f = 1 / [2π×√(LC)] can be used to calculate the resonant frequency of the RLC circuit, where:
f is the resonant frequency.L is the inductor's inductance.C is the capacitor's capacitance.The frequency at which the transfer function reaches its highest value is known as the resonant frequency of an electrical system. Consequently, the greatest output for a given input can be obtained. It has been demonstrated that resonance occurs when the values of the capacitive and inductive impedances are equal.
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A 90 kg firefighter needs to climb the stairs of a 20-m-tall building while carrying a 40 kg backpack filled with gear. How much power does he need to reach the top in 55 s?
The power required will be equal to 463.3 watt
Power is defined as the rate of work
[tex]P=\frac{W}{t}[/tex]
here P is power , W is work done , t is time taken
work done is defined as force times displacement
W=F×shere s is displacement
here total force will be the weight of the firefighter plus the weight of gear
therefore F=(90+40)×9.8 N
so substituting value in equation of power we get
P=[tex]\frac{25480}{55}[/tex]
p=463.3 watt
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A heater marked 2000W/3000W is switched on for 4 hours. For the first hour it is on the highest setting and for the last 3 hours it is on the lowest setting
1.1 How much energy does it transfer to the room in kWh (9kWh)
Answer:
9 kW-hr
Explanation:
3000 W = 3 kW for 1 hr = 3 kW - hr
2000 W = 2 kW for 3 hr = 6 kW -hr
total power = 3 + 6 = 9 kW-hr
