Given the circuit at the right in which the following values are used: R1 = 20 kΩ, R2 = 12 kΩ, C = 10 µ F, and ε = 25 V. You close the switch at t = 0. Find (a) the current in R1 and R2 at t=0, (b) the voltage across R1 after a long time. (Careful with this one.)
Answers
Answer:
a.) I = 7.8 × 10^-4 A
b.) V(20) = 9.3 × 10^-43 V
Explanation:
Given that the
R1 = 20 kΩ,
R2 = 12 kΩ,
C = 10 µ F, and
ε = 25 V.
R1 and R2 are in series with each other.
Let us first find the equivalent resistance R
R = R1 + R2
R = 20 + 12 = 32 kΩ
At t = 0, V = 25v
From ohms law, V = IR
Make current I the subject of formula
I = V/R
I = 25/32 × 10^3
I = 7.8 × 10^-4 A
b.) The voltage across R1 after a long time can be achieved by using the formula
V(t) = Voe^- (t/RC)
V(t) = 25e^- t/20000 × 10×10^-6
V(t) = 25e^- t/0.2
After a very long time. Let assume t = 20s. Then
V(20) = 25e^- 20/0.2
V(20) = 25e^-100
V(20) = 25 × 3.72 × 10^-44
V(20) = 9.3 × 10^-43 V
Related Questions
tech a says that semi-floating wrist pins can be pressed into the rods. tech b says that a rod heater can be used to install semi-floating wrist pins. who is correct?
Answers
The correct answer is both the tech are right that a rod heater can be used to install semi-floating wrist pins and semi-floating wrist pins can be pressed into the rods.
After some kind of friction secures the pin to the connecting, the piston can freely pivot inside the bosses of the piston pin. The most common method of attaching the semi-floating wrist pins to the rod is by press-fitting. The little end of the connecting rod is heated, which expands the metal and the diameter of the hole.If you're using high-level forced induction, nitrous oxide injection, high rpm or heavy sustained loading on your performance engine, upgraded semi-floating wrist pins represent the insurance deal of the century. Wall thickness is a critical factor based on application.
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Freshwater protozoans react to a/an _____ environment by removing water through _____.
A) hypertonic, turgor pressure
B) hypotonic, turgor pressure
C) isotonic, a contractile vacuole
D) hypertonic, a contractile vacuole
E) hypotonic, a contractile vacuole
Answers
The correct option among the given options is option E, i.e. hypotonic, a contractile vacuole.
Freshwater protozoans react to a hypotonic environment by removing water through contractile vacuole.
What are protozoans?
Protozoans are a group of single-celled organisms that live in different types of environment.
They are classified under kingdom Protista, which is the simplest group of organisms, and they have various nutritional requirements.
Protozoans range in size from 2-50 micrometres, and they are found in marine, freshwater and terrestrial environments.
Contractile vacuole and its function:
The contractile vacuole is a type of vacuole present in freshwater protozoans.
It has a vital role in maintaining the osmotic pressure of the cell and preventing the cell from bursting.
The contractile vacuole acts like a kidney and regulates the water balance in freshwater protozoans.
When a freshwater protozoan is placed in a hypotonic environment, that is an environment with low salt concentration, the cell will take in a large amount of water through osmosis.
To prevent the cell from bursting, the excess water is pumped out of the cell by the contractile vacuole.
As a result, the cell loses water, and the contractile vacuole will contract and expel the water to the outside of the cell.
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The space between two square flat parallel plate is filled with oil. Each side of
the plate is 600mm. The thickness of the oil films is 12.5mm. The upper
plate, which moves at 2.5m /s, requires a force of 98.1 N to maintain the
speed. Determine
I.The dynamic viscosity of the oil in poise.
Ii.The kinematic viscosity of the oil in strokes if the specific gravity of the oil
is 0.95
Answers
The dynamic viscosity of the oil in poise is 13.625 pois
The kinematic viscosity of the oil in strokes is 14.34
How to solve for the dynamic viscosityF viscous is given as n* ΔFr / Δy
where n = F * Δy / A * ΔVn
We have to define the terms of the formula
Δy = 12.5 x 10⁻³
ΔVr = 2.5m /s
A = 60 x 60 cm² = 0.36m
F = 98.1 n
We have to put the values in the formula
98.1 n * 12.5 x 10⁻³ / 0.36m * 2.5m /s
n = 1.3625 ns / m²
The kinematic viscosity of the oil in strokes if the specific gravity of the oil is 0.95
y = n / e
n = 1.3625
e = 0.95 x 10³
y = 1.3625 / 0.95 x 10³
= 1.434 x 10⁻³
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Which is an example of poor sportsmanship?
A.Yelling at the referee
B.Helping a player off the field
C.Encouraging a teammate
D.Cleaning up equipment
Answers
Answer:
A
Explanation:
Answer:
the answer is a
Explanation:
poor sportsmanship is a terrible thing and will decrease team moral while great sportsmanship is help each other and staying positive on and off the field
Name 4 out of the 10 items controlled by the left squat switch
Answers
The left squat switch is a switch located on the center pedestal of an aircraft cockpit, typically used in Boeing 737 airplanes. The items controlled by this switch are Autobrakes, Ground spoilers, Thrust reversers and Flaps.
Autobrakes: The left squat switch can be used to select the autobrake mode, which automatically applies the brakes when the aircraft touches down on the runway.Ground spoilers: The left squat switch can be used to deploy the ground spoilers, which are panels on the wings that disrupt the airflow and reduce lift when the aircraft is on the ground, helping to slow down the aircraft.Thrust reversers: The left squat switch can be used to deploy the thrust reversers, which are devices on the engines that redirect the thrust forward, helping to slow down the aircraft.Flaps: The left squat switch can be used to extend or retract the flaps, which are movable panels on the wings that increase lift and drag, allowing the aircraft to take off and land at lower speeds.Learn more about aviation: https://brainly.com/question/27961960
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when a meandering stream grows too sinuous so that it is no longer efficient, the stream will find a more direct path from one curve of the stream to the next, cutting off one curve. the body of water formed by the curve that is no longer part of the stream channel is called a(n):
Answers
Oxbow lake refers to the body of water created by the curve that is no longer a part of the stream channel.
What happens to a stream's erosive strength when its velocity rises?Energy. Kinetic energy is used in the flow of water and sediment through a stream system. The stream's ability to shred rock and convey silt increases with speed.
What causes the stream's velocity to increase?Flood Deposition and Erosion The slope of the stream as it descends to its base level (such as the ocean or a lake) rises as flood waters rise. Additionally, when stream depth rises, the hydraulic radius rises as well, increasing the stream's ability to flow freely. These two elements cause the stream velocity to rise.
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what is the fatigue ratio? if the tensile strength sts of an alloy is 900 mpa, what, roughly, would you expect its endurance limit se to be?
Answers
The Endurance limit or Fatigue limit of a metal alloy is 360 mpa.
What is Fatigue Ratio?
The ratio between tensile strength and fatigue strength or fatigue limit Numerous materials can have their fatigue qualities estimated using data from tension testing using the fatigue ratio.
What is the Fatigue limit?
The stress level below which an unlimited number of loading cycles can be given to a material without inducing fatigue failure is known as the fatigue limit or endurance limit.
Given:
Tensile strength of an alloy = 900mpa
The ratio of minimum to maximal fatigue stress is called fatigue stress or R, \(R=\frac{σmin}{σmax }\).
There are a certain number of load cycles per second or stress frequency f. With each stress parameter, a material's vulnerability to fatigue damage and failure grows.
Therefore, the endurance limit is 360 mpa.
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Develop rough sketches of ideas bridge
Answers
Answer:
look online
Explanation:
Select the correct answer. Which of the following devices is a simple machine? A.
an engine
B.
a pulley
C.
a motor
D.
a bicycle
E.
a crane
Answers
Answer:
A Pulley would be a simple machine.
Explanation:
A pulley has only has one kind of movement
Answer:
a pulley
Explanation:
letter B.
World Without Engines: Explain what todays world without engines would be like? How would it change your life? The world? The way we do things? Please write in paragraph format and include introduction, body, and conclusion. DON'T ANSWER UNLESS YOU HAVE THE ANSWER!!!!!!!!! I WILL MARK BRAINLYEST
Answers
Answer:
the world will not be the same it will change dramticily and
things will not be the same
Explanation:
What is a solution based process and why is it important to engineering
Answers
Answer:
What is a solution-based process and why it is important in engineering? The solution-based process are steps that engineers follow when they are trying to solve a problem / create a solution for something. It is important because it makes it easier to identify mistakes to solve problems.
Explanation:
Electrical Circuit question..
Answers
Answer:
Cool.
Explanation:
What do you notice about the speed of the water at different points along the pipe? When is the water the fastest? The slowest?
Answers
The speed of water in a pipe can vary depending on the shape and size of the pipe and the rate of flow of water.
The speed of water in a pipeGenerally, the speed of water is highest at the narrowest point of the pipe and lowest at the widest point.
In a pipe with a constant diameter, the speed of water is fastest at the center of the pipe and slowest at the edges. This is because the water experiences the least amount of friction and resistance at the center, where it is farthest away from the walls of the pipe.
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When water is run through a pipe that is narrow is flows faster than when the pipe is wider. This is called the Bernoulli's principle.
What is Bernoulli's principle?Bernoulli's principle asserts that in a horizontal flow of fluid, places with faster fluid speed will have less pressure than points of slower fluid speed.
When a vehicle goes quickly, it creates a low pressure area, and dusts are drawn along in the low pressure area. When we stand very close to the railway track on the platform and a fast train passes us, we are dragged towards the track due to the low pressure region created by the train's high speed.
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Given a unit step function u(t), its time derivative is: Select one: a. Unit impulse. b. A sine function c. Another step function d. A unit ramp function x(t)=2cos(6(pl)t+ pl/6) Select one: a. T=10 sec ,f=0.1 Hz b. T=0.16 sec ,f=6 Hz c. T=0.33 sec ,f=3 Hz The x(bt) is a compressed version of x(t) if: Select one: a. b greater than 1 b. b between 0 and 1 c. b=1 d. b less than 1
Answers
The time derivative of a unit step function is another step function, the period (T) is 0.33 sec and the frequency (f) is 3 Hz, when b < 1, the function x(bt) is compressed horizontally and vertically.
A unit step function is defined as a function u(t) that is zero for all values of t less than zero, and 1 for all values of t greater than zero. Its time derivative is defined as u′(t), which is a pulse with an amplitude of 1 occurring at t=0.
The given function is, \(x(t) = 2cos(6\pi t + \pi/6)\). Now, period T is given by: \($T = \frac{2\pi}{\omega}$\)
Where ω is the angular frequency of the function.
For the given function, \(\omega = 6\pi\). Therefore, \(T = \frac{2\pi}{6\pi}$ = $\frac{1}{3}$\) sec.
Frequency f is given by: \($f = \frac{1}{T}$\)Plugging in T, we get,\(f = \frac{1}{\frac{1}{3}}$= 3 Hz\).Therefore, the correct option is (c) T=0.33 sec ,f=3 Hz.
The given function is x(bt) which is a compressed version of x(t) if:b < 1. When b < 1, the function x(bt) is stretched horizontally and compressed vertically with respect to the function x(t). Therefore, the option (d) b less than 1 is correct.
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You want to run Hyper-V on your Windows 10 desktop computer. What should you do? Group of answer choices
A Use the Turn Windows features on or off utility.
B Reboot Windows 10 and press F12 to select Hyper-V.
C Download Hyper-V from the Microsoft download center.
D Reinstall Windows 10 and select the Hyper-V option.
Answers
You should A. use the Turn Windows features on or off utility to run Hyper-V on your Windows 10 desktop computer.
This option allows you to easily enable or disable certain Windows features, including Hyper-V. To access this utility, simply search for "Turn Windows features on or off" in the Windows search bar and select the appropriate option. From there, you can check the box next to Hyper-V to enable it and click "OK" to apply the changes. Once this is done, you should be able to run Hyper-V on your Windows 10 desktop computer.
Note: It is important to be cautious when enabling or disabling Windows features as this may affect the functionality of other programs or the operating system itself. It is recommended to only make changes to the features that you are familiar with or have a specific need for.
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Write a program that asks the user to enter a list of numbers. The program should take the list of numbers and add only those numbers between 0 and 100 to a new list. It should then print the contents of the new list. Running the program should look something like this:
Please enter a list of numbers: 10.5 -8 105 76 83.2 206
The numbers between 0 and 100 are: 10.5 76.0 83.2
Answers
In python 3.8
nums = input("Please enter a list of numbers: ").split()
new_nums = [x for x in nums if 0 < float(x) < 100]
print("The numbers between 0 and 100 are: " + " ".join(new_nums))
When you said numbers between 0 and 100, I didn't know if that was inclusive or exclusive so I made it exclusive. I hope this helps!
. True or False: It is possible with feedback control to obtain a stable closed-loop system even when the underlying open-loop system is unstable and not accurately known.
Answers
Answer:
True.
Explanation:
Technician A states that the wider the gap on an A/C clutch, the greater the electrical resistance measurement is observed when checking the windings. Technician B states that a wide clutch gap causes the compressor to remain engaged. Who is correct
Answers
Technician B is correct because it's true that a wide clutch gap in an A/C clutch would cause the compressor to remain engaged.
What is an A/C clutch?An A/C clutch can be defined as a mechanical device that is designed and developed for the conversion of energy generated by the engine and delivers it to the compressor.
For instance, when an air conditioner (A/C) is turned on, the clutch becomes engaged and it begins to spin rapidly and constantly, so as to transfer power to the air conditioner (A/C).
In conclusion, technician B is correct while technician A is wrong because it's true that a wide clutch gap in an A/C clutch would cause the compressor to remain engaged.
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A parallel circuit has a resistance of 280 and an inductive reactance of 360 02. What's this circuit's impedance?
Answers
Answer:
540 W
Explanation:
this is it dont anwser this is for my other account
Answers
Answer:
thanks for the poiunts
Explanation:
Process synchronization can be done on
Answers
Answer:
it is c) both (a) and (b)
Explanation:
one pound-force is the force required to accelerate a mass of 32.174 lbm by 9.807 ft/s2.
Answers
Yes, one pound-force is the force required to accelerate a mass of 32.174 lbm by 9.807 ft/s2.
This is the gravitational acceleration at sea level, which is the acceleration due to gravity. This means that a mass of 1 lbm will weigh 1 lbf if it is placed at sea level.
The force of gravity is the result of an attractive force between two objects, which is proportional to the mass of both objects and inversely proportional to the square of the distance between them. This means that the greater the mass of an object, the greater the force of gravity it will experience.
Therefore, the mass of 1 lbm will experience a force of gravity of 1 lbf when placed at sea level. This is why the weight of an object is typically measured in units of pounds.
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work involved. This model is one that many of us use to calculate and record exam gradee. Instructions: 1) Calculate a percentage grade for each student based on 90 total points. 2) Use ViOOKUP to assign a ketter grade to each student based on the percentape grade. 3) Complete the grade distribution table using the COUNTIF function.
Answers
The instructions given provide an effective guide on how to calculate and record exam grades using the model. First, one must calculate a percentage grade for each student based on 90 total points.
Second, the VLOOKUP function is to be used to assign a letter grade to each student based on the percentage grade. Finally, the COUNTIF function can be used to complete the grade distribution table. In more than 100 words, this is how to go about each step.
Calculate Percentage Grade for Each Student based on 90 Total PointsTo calculate a percentage grade for each student, the following formula can be used:Percentage grade = (Points earned/Total points) x 100Therefore, to calculate a percentage grade for each student based on 90 total points, one will divide the points earned by each student by 90 and multiply the result by 100.
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A satellite at a distance of 36,000 km from an earth station radiates a power of 10 W from an
antenna with a gain of 25 dB. What is the received power if the effective aperture area of the
receiving antenna is 20 m2?
Answers
The received power if the effective aperture area of the receiving antenna is 20 m2 is 177.77 m2.
What is Power?In physics, power is referred to as the rate of energy conversion or transfer over time. The unit of power in the SI system, often known as the International System of Units, is the Watt (W). A single joule per second is one watt.
Power was formerly referred to as activity in some research. A scalar quantity is power. As power is always a function of labor done, it follows that if a person's output varies during the day depending on the time of day, so will his power.
A measure of the pace at which energy is transferred, power is a physical quantity. As a result, it can be described as the pace of job completion relative to time.
Therefore, The received power if the effective aperture area of the receiving antenna is 20 m2 is 177.77 m2.
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A "calorie" is a unit of energy, defined as the amount of energy needed to raise the temperature of one gram of water by one degree Celsius. The nutritional labels on food products typically tell you how many calories of digestible energy are in one serving of food, where "digestible" means that the energy stored in the chemical bonds of the molecules comprising the food can be extracted by your body. (Water for example has energy, but that energy is not chemically accessible via digestion.) To simplify understanding for typical consumers, the "calories" reported on nutritional labels actually represent kilocalories: a 170 calorie can of beer actually contains 170,000 calories of digestible energy.
i) If a student foolishly decides to binge drink 21 beers on their 21t birthday, how many gallons of water could they have heated from room temperature (24 °C) to boiling (100 C) using an equivalent amount of digestible energy in the beer? Recall that one gallon of water is roughly 8 pounds.
ii) What is this energy equivalent to in BTU? A "BTU" or British Thermal Unit is also a unit of energy, defined as the amount of energy needed to raise the temperature of one pound of water by one degree Fahrenheit
iii) If you had purchased an equivalent amount of electrical energy in kW-hr from the utility company, how much would you have to pay? Is this cheaper than buying beer?
Answers
A "calorie" is a unit of energy that is defined as the usually inform you of the number of calories of digestible energy present in one serving of food. 21 beers times 17 calories per beer equals 357 calories.
What is "calorie"?Calories are units of energy that a food or drink provides. You can usually find calorie counts listed on food items, and wearables like the best fitness trackers allow you monitor how many calories you're burning by doing different activities. Certain foods, such as fatty, fried, or processed foods, tend to have more calories. Other foods, such as fresh fruit and vegetables, tend to have fewer calories. However, some healthy fruits and vegetables can be high in calories, while low-calorie foods, such as diet soda, don’t provide any nutritional value. We need calories to give us enough energy to move around, stay warm, grow, work, think, and play. Even our blood circulation and digestion need the energy gained from calories in order to function well.To learn more about blood circulation refer to:
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Which of these terms and concepts best connects to architectural patronage? feudal lord O rectilinear height latitude and longitude articulation of power Pentelic marble
Answers
The term that best connects to architectural patronage is "articulation of power."
Architectural patronage refers to the practice of commissioning and funding buildings or architectural projects by individuals or organizations with the intention of promoting their power, wealth, or status. In this context, architecture serves as a means of expressing and communicating the patron's authority and influence.
The concept of "articulation of power" refers to the ways in which power is expressed and communicated through architecture, such as through the use of certain materials, styles, or symbols that convey status and authority.
Therefore, this concept is closely related to architectural patronage, as it helps to explain how and why patrons use architecture to assert and reinforce their power and influence.
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A private plane pilot is what kind of individual transportation position? professional level mid-level entry-level EPA-certified
Answers
Answer:
A private plane pilot is a mid-level position.
Explanation:
The six pilot certifications in the US are as follows:
Sport PilotRecreational PilotPrivate Plane PilotCommercial Plane PilotFlight InstructorAirline Transport PilotFrom this listing, it is evident that the Private Plane Pilot is in the mid of the line so it is a mid-level position.
(20%) machining appears to play an important role in the manufacturing of this phone housing, but machining is a relatively slow process. can you explain why machining was chosen instead of sheet-metal forming or casting alone? list the major considerations and compare among all these processes to justify your answer.
Answers
No raw material is wasted during the metal forming process, and the product has higher mechanical qualities and is produced more quickly.
By using a wedge-shaped tool, machining is the removal of material in the form of chips. Metal plates, tubes, or solid round bars make up the material that is machined. On the other hand, metal flat sheets make up the material that goes through the fabrication process. Metal is heated in a furnace until molten before being cast. The metal is poured into a die, or mold, while it is still liquid, giving the metal the shape of the component.
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Build in quality, program execution, alignment, and transparencyare the four core values of the Scaled Agile (SAFe) framework. True or False
Answers
Build in quality, program execution, alignment, and transparency are the four core values of the Scaled Agile Framework (SAFe). True.
These values are used to provide the best quality to the customers. The core values are supposed to help organizations deliver value to customers faster and with higher quality than traditional methods. By adhering to the SAFe core values, an organization can create an environment that fosters a culture of innovation, collaboration, and continuous improvement.SAFe is a framework that provides a set of principles, practices, and tools that organizations can use to scale agile practices.
It is used by large organizations to develop and deliver high-quality software systems. SAFe provides a structured approach to scaling agile practices, allowing organizations to take advantage of the benefits of agile development at scale.In summary, the given statement is true that build in quality, program execution, alignment, and transparency are the four core values of the Scaled Agile (SAFe) framework.
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For the network of Fig. below, draw the output waveform if Vr = 4.3V , R = 1000Omega and Vi=25 sin ot. Assume an Si diode is used. + R D V_{i}; V_{r}; V_{o}
