WILL AWARD BEST ANSWER! find the current flowing across the 30 ohm resistor
i = _ a
Answers
0.143 A
Explanation:
The total resistance of the circuit is
[tex]r = \frac{(40)(30)}{40 + 30} + \frac{(50)(20 + 10)}{50 + (20 + 10)} \\ = 35.89 \: ohms[/tex]
so the total current is
Itotal= V/R = 9V/35.89 ohms
= 0.25 A
To find the voltage drop across the 30-ohns resistor, use
V = Itotal × (combined resistance of 40 30)
= 0.25 A × 17.14 ohms = 4.285 volts
so the current through the 30-ohm resistor is
I = (voltage drop)/30-ohms
= (4.285 V)/(30 ohms)
= 0.143 A
For a parallel circuit the voltage across each resistor is the same. Therefore, the voltage drop across the 30 Ω resistor is 9V. Then, the current through this resistor is 0.3 A.
What is resistance ?Resistance is the hindrance to the flow of current through a circuit. It is expressed in Ohms. Resistance and current are in inverse proportion. According to Ohm's law, the product of current and resistance is the voltage across the circuit.
V = I R
There are two type of circuits parallel and series. Parallel circuits connects each components in parallel fashion where, the current through each one will be different and voltage is constant.
In a series circuit, the voltage drop across each component is different but the current is the same.
Here, the resistors are connected in a parallel fashion. Hence the voltage drop across each resistors will be 9 V itself.
then current across 30 Ω resistor is:
I = V/R
= 9 v/ 30 Ω
= 0.3 A.
Therefore, the current through the resistor of 30 Ω is 0.3 A.
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Related Questions
what effect does the earth's surface have on solar radiation?
A. The ground absorbs half the solar radiation and stored it as infrared radiation for centuries
B. Half of the solar radiation is absorbed and converted to infrared (heat)
C. Nearly all solar radiation is reflected back into space by the ground
Answers
Answer:
B.
Explanation:
Solar radiation that is not absorbed or reflected by the atmosphere (for example by clouds) reaches the surface of the Earth. The Earth absorbs most of the energy reaching its surface, a small fraction is reflected. In total approximately 70% of incoming radiation is absorbed by the atmosphere and the Earth’s surface while around 30% is reflected back to space and does not heat the surface. The Earth radiates energy at wavelengths much longer than the Sun because it is colder. Part of this longwave radiation is absorbed by greenhouse gases which then radiate energy into all directions, including downwards and thereby trapping heat in the atmosphere.
Hope this helps, sorry if it is incorrect. Have a great day/night!
Solar radiation that is not absorbed or reflected by the atmosphere (for example by clouds) reaches the surface of the Earth. The Earth absorbs most of the energy reaching its surface, a small fraction is reflected
What is solar radiation?Solar radiation, often called the solar resource or just sunlight, is a general term for the electromagnetic radiation emitted by the sun.
Solar radiation can be captured and turned into useful forms of energy, such as heat and electricity, using a variety of technologies
Solar radiation that is not absorbed or reflected by the atmosphere (for example by clouds) reaches the surface of the Earth.
The Earth absorbs most of the energy reaching its surface, a small fraction is reflected. In total approximately 70% of incoming radiation is absorbed by the atmosphere and the Earth’s surface while around 30% is reflected back to space and does not heat the surface.
The Earth radiates energy at wavelengths much longer than the Sun because it is colder.
Part of this longwave radiation is absorbed by greenhouse gases which then radiate energy into all directions, including downwards and thereby trapping heat in the atmosphere.
To know more about solar radiation follow
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Hey guys...please help me with both b) and c) in this question.
Answers
Answer:
we cant draw plz show to any one
In electric motors and electric generators, which part is responsible for transferring current from the power source to the commutator or from the slip rings to where the electricity is needed? armature brush axle magnet
Answers
Answer:
brush
Explanation:
its correct
Answer:
B. Brush
Explanation:
Edg 2021
Determina la presión que ejercen los patinadores sobre el hielo, teniendo en cuenta que la cuchilla del patín mide 30cm de largo y su grosor es de 5mm, y que el peso de las dos personas es 120kg
Answers
Answer:
La presión que los patinadores ejercen sobre el hielo es 7,848,000 Pa
Explanation:
Los parámetros dados de los patinadores en la pala son;
La longitud de la hoja en el patín, l = 30 cm = 0.03 m
El espesor de la hoja, t = 5 mm = 0,005 m
El peso de las dos personas, m = 120 kg
Suponiendo que la sección transversal de la cuchilla sobre el hielo es rectangular, tenemos;
A = l × t
∴ A = 0,03 m × 0,005 m = 0,00015 m²
La fuerza de peso de los dos patinadores, W = m × g
Dónde;
g = La aceleración debida a la gravedad ≈ 9,81 m / s²
m = La masa de los dos patinadores = 120 kg
∴ W = 120 kg × 9,81 m / s² = 1,177,2 N
Presión, P = Fuerza, F/(Área, A)
∴ P = (1.177,2 N) / (0.00015 m²)= 7,848,000 Pascals
La presión que los patinadores ejercen sobre el hielo., P = 7,848,000 Pascals
When matter changes shape, does its mass change?
Answers
Answer:
No, the mass of an object is always the same, even if a chemical reaction happens or the object becomes denser.
Explanation:
If the time between the horn sounding and the people on the ship hearing the echo from the ship is 4 seconds, how far away is the ship from the cliff ? (velocity of sound in air is 331 m/s)
Question options:
A. 1324 m
B. 662 m
C. 0.012 m
D. 820 m
Answers
Answer:
D
Explanation:
The equation of a displacement time-curve of a particle is given as x=〖10t〗^2, the instantaneous velocity at t= 1s is *
Answers
please find ur answer in the attached image, mark as brainliest if it helps.
1. Which types of planets are more dense: terrestrial or
Jovian?
2. What is a light year?
Answers
Answer:
1. terrestrial
2. The distance light travels in one year
Explanation:
Motion only occurs if someone is there to witness an object moving
Answers
Answer:
True
Explanation:
Motion is change with time of the position or orientation of a body with respect to an observer
MARK ME BRAINLIEST THANKS MY ANSWER PLEASE
Motion is changed it all depends on the body .
A germanium piece is heated, then its resistance increases or decreases
Answers
Answer:
decreases
Explanation:
Two resistors, R1 = 25.0 ohms and
R2 = 64.0 ohms, are connected in
parallel. R1 has a 0.200 A current
flowing through it. What is the current
through R2?
Answers
Answer: 0.078
Explanation:
Given variables:
R1 = 25.0 , R2 = 64.0 , I1 = 0.200
Step 1: find V
0.200 = v/25
0.200 * 25 = v
5 = v
Step 2: Solve for I2
I = V/R
I = 5/64
I = 0.078125
Hope this helps!
A sled slides down a hill with friction between the sled and hill but negligible alr resistance. Which of the following must be correct about the resulting change in energy of the sled Earth system?
A) The sum of the kinetic energy and the gravitational potential energy changes by an amount equal to the energy dissipated by friction,
B)The gravitational potential energy decreases and the kinetic energy is constant.
C)The decrease in the gravitational potential energy is equal to the increase in kinetic energy
D)The gravitational potential energy and the kinetic energy must both decrease.
Answers
Answer:
A) The sum of the kinetic energy and the gravitational potential energy changes by an amount equal to the energy dissipated by friction,
Explanation:
The kinetic energy is the energy that the object has and is defied by the work that is needed to accelerate the body. The gravitational potential is a mechanism by which an equal amount of energy is being transferred per unit mass that is needed for the object to move from the specific location.Hence when the sled moves down the hill with the force of gravity it has negligible resistance as an equal amount of energy is dissipated.The sum of the kinetic energy and the gravitational potential energy changes by an amount equal to the energy dissipated by friction.
What is principle of conservation of energy?The principle of conservation of energy states that, the total mechanical energy of an isolated system is always conserved.
When a sled slides down a hill with friction between the sled and hill but negligible air resistance.
The sum of the kinetic energy and the gravitational potential energy changes by an amount equal to the energy dissipated by friction.
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which type of motion occur in a lift in one word
Pls answer
Answers
Answer:
Explanation:
Lift occurs when a moving flow of gas is turned by a solid object. The flow is turned in one direction, and the lift is generated in the opposite direction, according to Newton's Third Law of action and reaction. Because air is a gas and the molecules are free to move about, any solid surface can deflect a flow.
A force is acting on a 3-kg object during 5 seconds. If the object initially has a speed of 1.5m/s and after applying the force its speed is 4 m/s
Answers
Answer:
1.5 N
Explanation:
You've left us to guess what the question is. I will Assume it is what's the force?
Givens
m = 3 kg
vi = 1.5 m/s
vf = 4 m/s
t = 5 seconds
Formula
F = m * (vf - vi)/t
Solution
F = 3 * (4 - 1.5) / 5
F = 1.5 N
If you wanted to learn more about ancient scientific knowledge, whose life
would you research?
O A. Ibn al-Haytham's
B. Christian Doppler's
O C. Sir Isaac Newton's
D. Galileo Galilei's
Answers
Answer:
You would want search A.Ibn al-Haytham's
Which property of Special Relativity allows an electromagnet to work?
Answers
Answer:
El magnetismo es el conjunto de fenómenos físicos mediados por campos magnéticos. Estos pueden ser generados por las corrientes eléctricas o por los momentos magnéticos de las partículas constituyentes de los materiales. Es parte de un fenómeno más general: el electromagnetismo. También denomina a la rama de la física que estudia dichos fenómenos.
El níquel, hierro, cobalto y sus aleaciones se encuentran entre algunos de los materiales que presentan propiedades magnéticas que son fácilmente observables, y comúnmente se llaman imanes. Estos materiales son ferromagnéticos e interactúan fuertemente con los campos magnéticos externos a la vez que generan un campo magnético propio. Esto permite la tan conocida repulsión y atracción entre los polos de los imanes. Sin embargo, todos los materiales son influidos, de mayor o menor forma, por la presencia de un campo magnético
Answer:
b I think is the answer OK bro
Explain why the temperature varies with distance from the Sun in this way?
Answers
Answer:
The average surface temperature decreases the further you get from the Sun because the more distant planets receive less energy/heat/sunlight per square meter of their surface. This is because the energy from the Sun spreads out (becomes less concentrated) as you travel further from the source/Sun.
Explanation:
Explain why the temperature of the water stays constant
Answers
Answer:
When boiling occurs, the more energetic molecules change to a gas, spread out, and form bubbles. ... In addition, gas molecules leaving the liquid remove thermal energy from the liquid. Therefore the temperature of the liquid remains constant during boiling.
Answer:
nice
Explanation:
A 45kg person is standing at the top of a 15m building. If the person falls and lands on a trampoline with a spring constant of 55,000 N/m how much would the trampoline stretch?
Answers
[tex]\displaystyle \triangle x = 0.904353 \ m[/tex]
General Formulas and Concepts:Physics
Energy
Gravitational Potential Energy Formula: [tex]\displaystyle U_g = mgh[/tex]
m is mass (in kg)g is gravity (9.8 m/s²)h is height (in m)Spring Potential Energy Formula: [tex]\displaystyle U_k = \frac{1}{2}k \triangle x^2[/tex]
k is spring constant (in N/m)Δx is displacement (in m)Law of Conservation of Energy
Math
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightEquality Properties
Multiplication Property of EqualityDivision Property of EqualityAddition Property of EqualitySubtraction Property of EqualityExplanation:Step 1: Define
Identify
[Law of Conservation of Energy] [tex]\displaystyle U_g = U_k[/tex] → [tex]\displaystyle mgh = \frac{1}{2}k \triangle x^2[/tex]
[Given] m = 45 kg
[Given] h = 15 m
[Given] k = 55000 n/m
[Solve] Δx
Step 2: Solve for Δx
Substitute in variables [Law of Conservation of Energy]: [tex]\displaystyle (45 \ kg)(9.8 \ m/s^2)(15 \ m) = \frac{1}{2}(55000 \ N/m) \triangle x^2[/tex]Multiply: [tex]\displaystyle (441 \ kg \cdot m/s^2)(15 \ m) = \frac{1}{2}(55000 \ N/m) \triangle x^2[/tex]Multiply: [tex]\displaystyle 22491 \ J = \frac{1}{2}(55000 \ N/m) \triangle x^2[/tex]Multiply: [tex]\displaystyle 22491 \ J = (27500 \ N/m) \triangle x^2[/tex][Division Property of Equality] Divide 27500 N/m on both sides: [tex]\displaystyle 0.817855 \ m^2 = \triangle x^2[/tex][Equality Property] Square root both sides: [tex]\displaystyle 0.904353 \ m = \triangle x[/tex]Rewrite: [tex]\displaystyle \triangle x = 0.904353 \ m[/tex]Topic: AP Physics 1 - Algebra Based
Unit: Energy
Book: College Physics
All the sources of energy present on the earth are the outcomes of solar energy .Justify this statement with example
Answers
Answer:
because all the energy is directly depend on solar .. like light energy .. wind energy.. heat energy.. etc..
Explanation:
Which action would not speed up erosion in a Texas ecosystem?
A
High winds
B
Flash flooding
C
Acid rain
D
Large waves
Answers
Which of the following regions of the electromagnetic spectrum has the highest energy
(among the 4 listed here)?
A. Visible light
B. Radio waves
C. Infared light
D. UV light
Answers
The maximum energy is found in visible light from the following areas of the electromagnetic spectrum. Option A is correct.
What is the electromagnetic spectrum?The electromagnetic spectrum is seen as colors violet, indigo, blue, green, yellow, orange, and red. Blue light has a very short wavelength, and so produces a higher amount of energy.
Blue light in the visible zone has a very short wavelength. So that it produces a higher amount of energy that's why the blue part of visible light transfers the most energy.
Visible light from the following regions of the electromagnetic spectrum has the highest energy.
Hence, option A is correct.
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What is missing from the solubility graph shown on the right?
Answers
Answer:
the name and the units of the vertical axis. Explanation: As you see the horizontal axis shows that the independent variable is Temperature and that it is reported in °C.
Explanation:
Answer
The horizontal axis reveals to us that the independent variable is temperature which is reporting in C. We know that but what we dont know is the name or the untis on the vertical axis. Also a nice title and chart by it will help as well. A legend as well to explain what the colors even mean.
Explanation:
I got it right on edge.
A sound wave is an example of a _____ wave.
longitudinal
fluid
transverse
reverse
Answers
Answer:
longitudinal wave
OK hope this will help you
Basic design elements include (Check 7)
What are the 3 properties of color? Immersive Reader
depth, shade, fragrance
value, hue, depth
saturation, hue, chroma
hue, value, intensity
Answers
Answer: depth, shade, fragrance
Explanation:
Which option is an example of chemical energy being transformed into
kinetic energy?
A. A ball rolling down a hill
B. A battery powering a flashlight
C. A plant storing energy from the Sun in its leaves
O D. A rocket engine igniting its fuel during liftoff
SUBMIT
Answers
Rocket engine igniting is chemical energy when he in turn makes it launch and move which is kinetic energy
Answer: D
Rocket engine igniting is chemical energy when he in turn makes it launch and move which is kinetic energy
Will mark brainliest
Answers
C: 78.2 m/s
Step by step:
I am having trouble with writing a 2 paragraph summary about this vidio can someone help me
(this si the vidio )Picture of the Big Bang (a.k.a. Oldest Light in the Universe)
Answers
Answer:
hmmm ok
Explanation:
A wave has an amplitude of 0.2 cm.
What does this mean?
Select one:
- The horizontal distance between a crest and a trough is 0.2 cm.
- The distance between the resting point and the maximum height of the wave is 0.2 cm.
- The distance between two crests is 0.2 cm.
- The vertical distance between a crest and a trough is 0.2 cm.
Answers
The amplitude is measured from the resting point up to the highest point of the wave.
Se tienen 500g de alcohol etílico a una temperatura de -40 °C ¿Cuánto calor se necesita para transformarlo a vapor a una temperatura de 150ºC?
Answers
The question is: You have 500g of ethyl alcohol at a temperature of -40 ° C. How much heat is needed to transform it into steam at a temperature of 150ºC?
Answer: 233700 J heat is needed to transform ethyl alcohol into steam at a temperature of [tex]-40^{o}C[/tex] to [tex]150^{o}C[/tex].
Explanation:
Given: Mass = 500 g
Initial temperature = [tex]-40^{o}C[/tex]
Final temperature = [tex]150^{o}C[/tex]
The standard value of specific heat of ethyl alcohol is [tex]2.46 J/g ^{o}C[/tex].
Formula used to calculate the heat energy is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = heat energy
m = mass of substance
C = specific heat
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times (T_{2} - T_{1})\\= 500 g \times 2.46 J/g^{o}C \times [150 - (-40)]^{o}C\\= 233700 J[/tex]
Thus, we can conclude that 233700 J heat is needed to transform ethyl alcohol into steam at a temperature of [tex]-40^{o}C[/tex] to [tex]150^{o}C[/tex].