Answers
Answer:
the self-inductance of the device is 5.69 mH
Explanation:
Given;
change in current, ΔI = 3.2 A
change in time, Δt = 0.13 ms = 0.13 x 10⁻³ s
induced emf, E = 140
The self-inductance is calculated as;
\(E = L\frac{\Delta I}{\Delta t} \\\\where;\\\\L \ is \ the \ self-inductance\\\\\L = \frac{E\Delta t}{\Delta I} \\\\L =\frac{140 \times 0.13 \times 10^{-3}}{3.2} \\\\L = 0.00569 \ H\\\\L = 5.69 \ mH\)
Therefore, the self-inductance of the device is 5.69 mH
Related Questions
The half-life for U 238 is 4.5x109 years.
a) If five half-lives have gone by how many years have gone by?
b) If you start with 240 grams of U 238 and end up with 60 grams, how many years have gone by?
c) If you start with 240 grams of U 238 and 1.8 x 10^10 years go by, how much U 238 is left?
d) If you start with 562 g and six half lives go by how many grams are left?
Answers
Answer:
a. 2.25 × 10^10 yrs
b. 9 × 10^9 yrs
c. 59.5g
d. 8.78g
Explanation:
(a) Original sample(N) = 238g
Half-life = 4.5 × 10^9 yrs
5 half-life 5T½ = 5 × 4.5 × 10^9 yrs
= 2.25 × 10^10 yrs
(b) If N = 240g
N/2 = 120g
N/4 = 60g
Meaning 2T½
= 2 × 4.5 × 10^9 yrs
= 9 × 10^9 yrs
(c) 1.8 × 10^10 ÷ 4.5 × 10^9 = 4
at 4T½ we have N/16 = 238/4 = 59.5
=> the sample left = 59.5g
(d) from the question N = 562g
at 6T½
the amount left will be N/64
= 562÷64 = 8.78g
NB: For questions please you can read more on radioactivity
6. A dumb, bored child wants to see what will happen if they jump off the top of their shed with an umbrella. As you can guess, the umbrella collapses and the kid plummets 2.50 meters to the ground. How fast were they falling when they hit the ground? (The answer is not "zero") Knowns, Unknowns and Equation(s): Work: Result with units:
Answers
Answer:
All i kno is that that kid ain't gonna be ok
Explanation:
if u tell me how to do it ill do it
What kind of motion does a star have when it appears to be moving across the sky
and night progresses?
A actual motion
B apparent motion
C geocentric motion
D gibbous motion
Answers
Answer:
Apparent motion.
Explanation:
A star has apparent motion when it appears to be moving across the sky as a night progress. The next time you observe the night sky, pay attention to where a specific star is located and then wait an hour and observe the new location of the star in the same night sky.
Actual motion of stars is the actual or absolute movement of stars in space. Because stars are so distant, their movement is difficult to see. If you could live one thousand years and observe the same star, only then it would be obvious that that star moved in space.
Theodore is running at 2m/s as he runs off a bluff and drops 10 meters into a water filled rock
quarry. Calculate the time it takes for Theodore to splash down. Calculate the distance he lands
away from the edge of the bluff? (show one's work)
Answers
5 second is the time it takes for Theodore to splash down running at 2m/s velocity as he runs off a bluff and drops 10 meters into a water filled rock
quarry.
velocity= 2m/s
distance=10 meters
velocity=distance/time
time=distance/velocity
time=10 meters/2m/s
time=5 second
A vector number known as velocity describes "the pace at which an item changes its location." Imagine a person moving quickly, taking one stride ahead, one step back, and then beginning from the same place each time. A vector quantity is velocity. As a result, velocity is aware of direction. One must consider direction while calculating an object's velocity. Saying that an item has a velocity of 55 miles per hour is insufficient. The direction must be included in order to adequately characterize the object's velocity. Simply said, the velocity vector's direction corresponds to the motion of an item
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To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. A conductor is placed in an external electrostatic field. The external field is uniform before the conductor is placed within it. The conductor is completely isolated from any source of current or charge.
Answers
Answer:
Explanation:
The electric field inside of a conductor is 0 because the conduction electrons are pushed to the outer edges of the conductor. The surface of the conductor still has charge.
Determine the speed of B when A and B pass each other. The speed of B is ___ mi/h
Answers
To determine the speed of B when A and B pass each other, we need to first gather information about their initial velocities, relative speeds, and direction of motion.
The speed of A is given and we need to find the speed of B. The formula for relative speed can be used, which states that the relative speed of two objects is equal to the sum of their individual speeds when they are moving in the same direction, and the difference of their speeds when they are moving in opposite directions. In this case, if A and B are moving in opposite directions, then their relative speed is equal to the speed of A plus the speed of B.
It is important to note that the speed of B must be expressed in the same unit as the speed of A (e.g. miles per hour) to allow for accurate comparison and calculation. Once the relative speed is known, it can be used to determine the speed of B by solving for it algebraically. The answer should be a numerical value in miles per hour.
It is also important to take into consideration any external factors that may affect the motion of the objects such as friction, air resistance, and changes in direction or speed. These factors can impact the accuracy of the calculation and should be accounted for if possible.
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2. For electric circuit shown in Figure find currents in each resistor.
Answers
The current flowing in the 2Ω and 1Ω is 1.14 A and the current flowing in the 3Ω and 4Ω is 0.286 A.
What is the current flowing in each resistor?The value of the current in each resistor is calculated by applying Kirchoff voltage law as follows;
The total voltage in loop 1 is calculated as;
2 + 4 - I₁R₁ - (I₁ - I₂)R₂ - I₁R₃ = 0
6 - 2I₁ - 3(I₁ - I₂) - 1₁ = 0
The current flowing in loop 2 is calculated as;
I = V/R
I₂ = ( 6 V - 4 V ) / (3 + 4)
I₂ = 0.286 A
The value of the current flowing in loop 1 is calculated as;
6 - 2I₁ - 3(I₁ - I₂) - 1₁ = 0
6 - 2I₁ - 3(I₁ - 0.286) - 1₁ = 0
6 - 3I₁ - 3₁ + 0.858 = 0
-6I₁ = -6.858
I₁ = 6.858 / 6
I₁ = 1.14 A
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band of tissue in the body
that contracts and helps to
produce movement
Answers
Answer:
Muscle Tissue
Explanation:
Sorry if I'm wrong
A gene can be best described as a unit of –
Answers
A microwave consists of two resistive components in series - the microwave generator thatconsumes 80v and a motor that turns the platter that has a resistance of 509. The microwaveplugs into the wall that gives a total of 120v. Draw the circuit and solve for Rt, Rgenerator, It,Vmotor.
Answers
Given data:
Voltage of the source;
\(V_t=120\text{ V}\)Voltage across the generator;
\(V_{generator}=80\text{ V}\)Resistance of the motor;
\(R_{motor}=509\text{ }\Omega\)Circuit diagram:
In a series combination, the current flowing the circuit will be the same for all components, while the different potential differences across the different components.
The total potential of the circuit will be equal to the sum of the potential difference across different components. Therefore,
\(V_t=V_{generator}+V_{motor}\)Here, V_motor is the potential difference across the motor.
The potential difference through the motor is given as,
\(V_{motor}=V_t-V_{generator}\)Substituting all known values,
\(\begin{gathered} V_{motor}=120\text{ V}-80\text{ V} \\ =40\text{ V} \end{gathered}\)Therefore, the voltage across the motor (V_motor) is 40 V.
According to the Ohm's law,
\(V=IR\)Applying Ohm's law for the motor;
\(V_{motor}=I_tR_{motor}\)Therefore, the current through the motor is given as,
\(I_t=\frac{V_{motor}}{R_{motor}}\)Substituting all known values,
\(\begin{gathered} I_t=\frac{40\text{ V}}{509\text{ }\Omega} \\ \approx0.0785\text{ A} \end{gathered}\)Therefore, the total current through the circut (I_t) is 0.0785 A.
Now applying Ohm's across the generator,
\(V_{generator}=I_tR_{generator}\)The resistance of the generator is given as,
\(R_{generator}=\frac{V_{generator}}{I_t}\)Substituting all known values,
\(\begin{gathered} R_{generator}=\frac{80\text{ V}}{0.0785\text{ A}} \\ \approx1019.11\text{ }\Omega \end{gathered}\)Therefore, the resistance of the generator (R_generator) is 1019.11 Ω.
In series combination, the total resistance of the circuit (R_t) is given as the sum of the resistance of individual components. Therefore,
\(R_t=R_{generator}+R_{motor}\)Substituting all known values,
\(\begin{gathered} R_t=1019.11\text{ }\Omega+509\text{ }\Omega \\ =1528.11\text{ }\Omega \end{gathered}\)Therefore, the total resistance (R_t) of the circuit is 1528.11 Ω.
A person following a liberal ideology would likely approve of
Answers
not sure sorry :5
The marble has its maximum gravitational potential energy when it is at the starting point: the
highest point on the roller coaster. How much of this potential energy is converted to the
marble's kinetic energy?
Answers
Answer:
Explanation:
This depends on the height.
Using the formula mgh + 1/2mv^2 = total mechanical energy, we can determine the amount of kinetic and potential energy. I'm assuming your talking about if the marble goes all the down, then all of the energy is converted.
what is a likely consequence of continued human population growth
Answers
Answer:
Rapid human population growth has a number of consequences. Population grows fastest in the world's poorest countries. High fertility rates have historically had a strong relation with poverty, and high childhood mortality rates
Explanation:
i got it from goo.gle but i hope that helps:)
have a good day bro
two cars A and B are 600 meters apart car A travels due east at some speed per on a collision course with car b which travels due west at half speed as car A if the two cars fatally collide with each other in 5 seconds how fast was car A going?
Answers
Answer:
Car A was going at 80 m/s
Explanation:
Let's call "x" the unknown speed of car A. In such case, the speed of car B would be x/2.
We proceed to describe the distance covered by car A (dA) in the 5 seconds it took to collide: dA = speed * time = x * 5 = 5 x
Now the distance covered by car B (dB) in the same time would be:
dB = speed * time = (x/2) * 5 = 5 x / 2
Now, we know that the distance that separated both cars was 600 meters, so the addition of what car A covered plus what car B covered must equal 600 m, and in equation form:
dA + dB = 600
5 x + 5 x / 2 = 600
combining like terms:
15 x / 2 = 600
multiplying both sides by 2:
15 x = 1200
divide both sides by 15:
x = 80 m/s
This is the speed of car A.
The number of distinct ways of placing four indistinguishable balls into five distinguishable boxes is _____
Answers
The number of distinct ways of placing four indistinguishable balls into five distinguishable boxes is 20.
To solve this problem, we can use the stars and bars method, which is a combinatorial technique used to count the number of ways to distribute indistinguishable objects into distinguishable containers. In this case, we have four indistinguishable balls and five distinguishable boxes.
The stars and bars method works by representing each ball as a star and using bars to separate the balls into different boxes. For example, if we wanted to distribute two balls into three boxes, we could use the following diagram:
* | * * | *
In this diagram, the first and last bars represent the boundaries of the containers, while the stars represent the balls.
The second bar separates the first two balls from the last ball, indicating that the first two balls are in the first container and the last ball is in the third container.
To distribute four balls into five boxes, we need to use three bars to separate the balls into four groups. We have a total of six spaces to place the bars (including the boundaries), and we need to choose three of them to place the bars.
Therefore, the number of distinct ways to place four indistinguishable balls into five distinguishable boxes is the same as the number of ways to choose three spaces out of six, which is:
6 choose 3 = (6!)/(3!3!) = 20
Therefore, there are 20 distinct ways to place four indistinguishable balls into five distinguishable boxes using the stars and bars method.
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describe how the wavelength of a wave changes if the wave slows down but its frequency does not change
Answers
If the wave slows down with no change in frequency, the wavelength decreases.
What is a wave?A wave is defined as the disturbance that has the ability to transfer energy from one point to another in a medium.
The properties of a wave include the following:
Wavelength: This is defined as the distance that is observed between adjacent points in an identical cycle of a waveform.Frequency: This is the number of cycles of a wave that can occur per minute time.Time period: This is the time it takes for a complete cycle of wave to occur.Speed: Wave speed is the distance a wave travels in a given amount of time.Amplitude: This is defined as the distance from the centre line (or the still position) to the top of a crest or to the bottom of a trough.When there is a change in the speed of the wave with no change in frequency, the length of the wave would decrease.
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A ball is thrown up into the air. When it gets to the very top,
what kind of energy does it have?
Answers
At the highest attitude, the velocity of the ball is 0 m/s, so the kinetic energy is 0 as well.
Hence the answer is potential energy because it doesn't depend on velocity .
HELP PLEASEEEEEE HELP PLEASE
Answers
The letter that represents the various descriptions is as follows:
5.) Angle of incidence: B
6.) Object: D
7.) Plain mirror:A
8.) Reflection: E
9.) Angle of reflection: C
10.) Normal: F
How does the diagram explain the law of reflection?The law of reflection in a plain mirror states that the angle of reflection is equal to the angle of incidence.
The diagram explains the law of reflection on a plain mirror because it shows the reflection of the object D as E after creating an angle of incidence B on the plane mirror surface A which is equal to the angle of reflection C.
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A flywheel having constant angular acceleration requires 4.00 ss to rotate through 164 radrad . Its angular velocity at the end of this time is 106 rad/srad/s . Find the angular velocity at the beginning of the 4.00 ss interval; the angular acceleration of the flywheel. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Rotation of a bicycle wheel.
Answers
Answer:
\(\omega '=-13.5rad/s\)
Explanation:
From the question we are told that:
Time \(t=4sec\)
Angular displacement \(\theta= 161 rad\)
Final Angular velocity \(\omega = 100 rad / s\)
Let
Angular acceleration \(\alpha\)
Generally the equation for Initial Angular velocity \(\omega '\) is mathematically given by
\(-\omega '^2=2 \alpha \theta -\omega^2\)
\(\omega '^2= \alpha 328 +11236\)
Also,Initial Angular velocity \(\omega '\) is mathematically given by
\(\omega '=\omega - \alpha t\)
Therefore substitution
\(-\omega '^2=2 \alpha \theta -\omega^2\)
\(\omega '=\omega - \alpha t\)
\((\omega - \alpha t)^2=2 \alpha \theta -\omega\)
\(-16\alpha^2+848\alpha+11236= \alpha 328 -11236\)
\(16\alpha^2-520\alpha=0\)
\(\alpha=29.875rads/s^2\)
Substitution in the 2nd equation for Initial Angular velocity \(\omega '\)
\(\omega '=106-(29.875rads/s^2*4)\)
\(\omega '=-13.5rad/s\)
A spring of negligible mass and force constant k = 430 N/m is hung vertically, and a 0.270 kg pan is suspended from its lower end. A butcher drops a 2.1 kg steak onto the pan from a height of 0.40 m. The steak makes a totally inelastic collision with the pan and sets the system into vertical SHM. What are:
a. the speed of the pan and steak immediately after the collision
b. the amplitude of the subsequent motion
c. the period of that motion
Answers
On a warm summer day, a large mass of air (atmospheric pressure 1.01×105Pa) is heated by the ground to a temperature of 25.0 ∘C and then begins to rise through the cooler surrounding air. Calculate the temperature of the air mass when it has risen to a level at which atmospheric pressure is only 8.70×104 Pa. Assume that air is an ideal gas, with γ=1.40. (This rate of cooling for dry, rising air, corresponding to roughly 1 ∘C per 100 m of altitude, is called the dry adiabatic lapse rate.)
Answers
The temperature of the air mass when it has risen to a level at which atmospheric pressure is only 8.70×10⁴ Pa is approximately 14.3°C.
Using the ideal gas law, we can write: PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the absolute temperature. Since the mass of air is not changing, we can write: PV = constant.
Applying this to the situation where the air mass rises to a level where the pressure is 8.70×10⁴ Pa, we get:
(1.01×10⁵ Pa)×V = (nR/T1)×T1(8.70×10⁴ Pa)×V = (nR/T2)×T2Dividing the second equation by the first and using the fact that γ=Cp/Cv=1.40 for air, we get:
(T2/T1) = [(P2/P1)^(γ-1)/γ] = [(8.70×10⁴ Pa)/(1.01×10⁵ Pa)]^(1.4/1.4) = 0.813Solving for T2, we get:
T2 = T1×(P2/P1)^(γ-1)/γ = (25+273) K×0.813 ≈ 287.3 K ≈ 14.3°CThus, the temperature of the air mass when it has risen to a level at which atmospheric pressure is only 8.70×10⁴ Pa is approximately 14.3°C.
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If a person is standing up in a moving bus that stops suddenly,the person can easily fall forwards.Has a force acted to push the person forwards? Use Newton's law of motion to explain what is happening.
Answers
Answer:
i think gravity created a force strong enough to push him down.but it also depends how slow or fast the bus is going
Explanation:
gravity as we all now it is pretty strong so if the bus is going fast then the person standing up will fall but if the bus is going pretty slow then it'll just nudge him.
How does the Law of Conservation of Energy (or energy transformation) relate to the home?
Answers
Answer:
"The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. ... The only way to use energy is to transform energy from one form to another."
Explanation:
Brainliest?
Given the functions f(x)=(1/x-3)+1 and g(x) = (1/1+4)+3
Which statement describes the transformation of the graph of function f onto the graph of function g?
O The graph shifts 2 units right and 7 units down.
O The graph shifts 7 units left and 2 units up.
O
e graph shifts 7 units right and 2 units down.
O The graph shifts 2 units left and 7 units up.
Answers
The statement that describes the transformation of the graph of function f onto the graph of function g is: The graph shifts 2 units right and 7 units down.
To determine the transformation of the graph of function f onto the graph of function g, we compare the two functions f(x) and g(x) and observe the changes in the equations.
The function f(x) = (1/x - 3) + 1 represents a reciprocal function that is shifted vertically 1 unit up and horizontally 3 units to the right. The reciprocal function is reflected about the line y = x.
The function g(x) = (1/(1 + 4)) + 3 simplifies to g(x) = 4 + 3 = 7, which is a constant function representing a horizontal line at y = 7.
By comparing the equations, we can see that the transformation from f(x) to g(x) involves the following changes:
The term 1/x in f(x) is replaced by the constant 1/(1 + 4) in g(x), resulting in a vertical shift of 7 units up.
The term -3 in f(x) is replaced by 3 in g(x), resulting in a vertical shift of 3 units up.
The +1 in f(x) is replaced by +3 in g(x), resulting in an additional vertical shift of 2 units up.
Therefore, the overall transformation is a shift of 2 units to the right and 7 units down.
Hence, the correct statement is: The graph shifts 2 units right and 7 units down.
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How do humans obtain the carbon and energy they use in their bodies?
A. by breathing in carbon dioxide from the atmosphere
B. by consuming plants or other animals
C. by absorbing energy from sunlight
D. by absorbing carbon found in the soil
Answers
Answer:
B. . by consuming plants or other animals
2. Height at point A is 30.0 meters with a cart mass of 200.0 kg initially at rest. Point B is at a height of 25.0 meters. Find the KE and PE at points A and B along with the velocity at point B assuming no friction. Show Your Work
Answers
At maximum height, velocity is zero and kinetic energy will be zero.
K.E(A) = 0
P.E(A) = mgh = 200 x 9.8 x 30 = 58,800 J
K.E(B) = P.E(A) - P.E(B)
K.E(B) = 58,800 J - (200 x 9.8 x 25)
K.E(B) = 58,800 J - 49,000 J
K.E(B) = 9,800 J
Velocity at point BK.E = ¹/₂mv²
v² = 2K.E/m
v² = (2 x 9800)/(200)
v² = 98
v = √98
v = 9.9 m/s
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What is curved space?
Answers
Which is the correct representation of the right-hand rule for a current flowing to the right?
Answers
Answer:
The third image
Explanation:
The one with the thumb pointing to the right
Answer:
3, correct on Edge 2020
Please help I’m confused on this
Answers
Answer:
inversely proportional to
write down the value of
920 kg in g
Answers
Answer:
920000
Explanation:
Each kg contains 1,000 grams