An uncharged capacitor and a resistor are connected in series with a switch and a 12 V battery. At the instant the switch is closed, the voltage across the resistor is

Answers

Answer 1

Answer:

V = 12 V

Explanation:

Since a capacitor can't change the voltage between its plates  instantaneously, this means that just after the switch is closed, the voltage through the capacitor is zero.So, the current that flows in this moment is the same that would flow in a series circuit with only one resistor connected to the battery.Applying KVL to the circuit (neglecting the presence of the capacitor which can be replaced by a short circuit just after closing the switch), the voltage through the resistor must be equal to the one of the battery, i.e., 12 V.

Related Questions

How far can you get away from your little
brother with the squirt gun filled with
paint if you can travel at 3 m/s and you
have 15s before he sees you?
Know
Find
Equation
Solve

Answers

spray him in the eyes and you have until he washes it put

A monk is sitting atop a mountain in complete rest in meditation. What is the Kinetic
Energy of the monk? (assume mass of 65 kg and the mountain's height was 1000 m)
4,225,000
No Kinetic Energy - because there is no movement
637,000
65.000

Answers

Answer:

No kinetic energy-because there is no movement

Explanation:

It states that the monk is at complete rest so there is no movement.

What is the difference between inertia and momentum?​

Answers

Inertia is the resistance offered by a body to the motion whereas momentum is the tendency of a body to continue moving.

Is light from a fire matter​

Answers

Answer:

Is fire matter? Matter is anything that has mass and occupies space. The flame itself is a mixture of gases (vaporized fuel, oxygen, carbon dioxide, carbon monoxide, water vapor, and many other things) and so is matter. The light produced by the flame is energy, not matter.

Yes it is matter exits everywhere and yes light is from a fire matter

Consider a length of pipe bent into a U-shape. The inside diameter of the pipe is 0.5 m. Air enters one leg of the pipe at a mean velocity of 100 m/s and exits the other leg at the same magnitude of velocity, but moving in the opposite direction. The pressure of the flow at the inlet and exit is the ambient pressure of the surroundings. Calculate the magnitude and direction of the force exerted on the pipe by the airflow. The air density is 1.23 kg/m3 .

Answers

Answer:

The magnitude of the force exerted on the pipe by the air is 4830 N and it acts horizontally

Explanation:

Given the data in the question;

from the Newton's second law of motion;

F = ma

where m is the mass, a is acceleration and F is the force exerted on the pipe due to the airflow in it

now in terns of mass flow;

F = [tex]m^{"}[/tex]V

where [tex]m^{"}[/tex] is the mass flow rate, V is the velocity(

so

[tex]m^{"}[/tex] = pAV

[tex]m^{"}[/tex] = p × ([tex]\frac{\pi }{4}[/tex] d² ) × V

where d is the diameter of the pipe( 0.5 m)

p is the density( 1.23 kg/m³ )

velocity v is 100 m/s

so we substitute

[tex]m^{"}[/tex] = 1.23 × ([tex]\frac{\pi }{4}[/tex] (0.5)² ) × 100

[tex]m^{"}[/tex] = 30.75 × [tex]\frac{\pi }{4}[/tex]

[tex]m^{"}[/tex] = 24.15 kg/s

Now lets write the equation for the force exerted on the pipe by the airflow

F = [tex]m^{"}[/tex]( V₁ - V₂)

where V₁ is velocity at inlet ( 100 m/s )

V₂ is velocity at exit ( - 100 m/s )

so we substitute

F = 24.15 ( 100 - (-100))

F = 24.15 × 200

F = 4830 N

The pipe is symmetric about horizontal axis so the force should also b acting only in the horizontal direction since any force component in the vertical direction is nullified due to this symmetry

Therefore, The magnitude of the force exerted on the pipe by the air is 4830 N and it acts horizontally

Gravity Rocks!
Three friends were talking about gravity. One friend
held up a rock and asked his friends whether the gravi-
tational force on the rock depended on where the rock
was located. Each friend had a different idea about a
place where the gravitational force on the rock would
be the greatest. This is what they said:
Lorenzo: "I think if you put the rock on the top of a very tall mountain, the gravita-
tional force on the rock will be greatest."
Eliza: "I think the gravitational force will be greatest when the rock is resting on
the ground near sea level."
Flo: "I think you have to go really high up. If you drop the rock out of a high-
flying plane, the gravitational force will be greatest."
Explain why you agree with
Which friend do you most agree with?
that friend.

Answers

Answer:

Eliza’s suggestion is the most promising

Explanation:

Newton’s law of universal gravitation is [tex]F = G\frac{m_1m_2}{r^2}[/tex] where G is a constant and both masses are constant in this experiment as well. So it only depends on r, the distance between the center of mass of both objects.

Bringing it high in the sky, as Flo suggests, is definitely not a good idea because it only increases the distance from the center of the Earth mass.

A mountain contains significant mass, so the center of the Earth mass is somewhat shifted to regions with the largest mountains. However, standing on top of a mountain, as Lorenzo suggests, doesn’t help since the shift of the center of mass, if any, is far smaller than the height of the mountain.

Standing near sea level, as Eliza suggests, is a good way to minimize the distance to the center of the Earth mass.

(a) What is the electric field 4.00 m from the center of the terminal of a Van de Graaff with a 3.00 mC charge, noting that the field is equivalent to that of a point charge at the center of the terminal?
______ N/C
(b) At this distance, what force does the field exert on a 2.00C charge on the Van de Graaff's belt?
_____ N

Answers

Answer:

a)   E = 1.69 10⁶6 N / C,  b)  F = 3.38 10⁶ N

Explanation:

a)  In this exercise using Gauss's law we can consider the charge of the generator sphere as if it were at its center, therefore the electric field is

          E = k [tex]\frac{q}{r^2}[/tex]

let's calculate

         E = 9 10⁹ 3.00 10⁻³ / 4²2

         E = 1.6875 10⁶ N / C

 

          E = 1.69 10⁶6 N / C

b) let's calculate the electric force

          F = q E

          F = 2.00 1.69 10⁶

          F = 3.38 10⁶ N

The starter motor of a car engine draws an electric current of 110 A from the battery. The copper wire to the motor is 4.20 mm in diameter and 1.73 m long. The starter motor runs for 0.95 s before the car engine starts up.

How much electric charge passes through the starter motor?
________
What is the current density in the wire?
_________
How far does an electron travel along the wire while the starter motor is on? (The density of conduction electrons in copper is n = 8.50×1028 1/m3.)
________

Answers

Answer:

a. 104.5 C b. 7.94 × 10⁶ A/m² c. 5.83 × 10⁻⁴ m/s

Explanation:

a. How much electric charge passes through the starter motor?

Using Q = It where Q = electric charge passing through the starter motor, I = current = 110 A and t = time = 0.95 s

So, Q = It = 110 A × 0.95 s = 104.5 C

b. What is the current density in the wire?

The current density, J = I/A where I = current = 110 A and A = cross-sectional area = πd²/4 where d = diameter of copper wire = 4.20 mm = 4.20 × 10⁻³ m

So, J = I/A

= I/πd²/4

= 4I/πd²

= 4 × 110 A/π(4.20 × 10⁻³ m)²

= 440 A/55.42 × 10⁻⁶ m²

= 7.94 × 10⁶ A/m²

c. How far does an electron travel along the wire while the starter motor is on? (The density of conduction electrons in copper is n = 8.50×1028 1/m3.)

To find how far the electron travels, we need to find the electron drift velocity from

J = nev where J = current density = 7.94 × 10⁶ A/m², n = electron density = 8.50 × 10²⁸ m⁻³, e = electron charge = 1.602 × 10⁻¹⁹ C, v = drift velocity of electrons and A = cross-sectional area of wire = πd²/4 where d = diameter of copper wire = 4.20 mm = 4.20 × 10⁻³ m

So, v = J/ne

Substituting the values of the variables into the equation, we have

v = 7.94 × 10⁶ A/m² ÷ (8.50 × 10²⁸ m⁻³ × 1.602 × 10⁻¹⁹ C)

v = 7.94 × 10⁶ A/m² ÷ (13.617 × 10⁹ Cm⁻³)

v = 0.583 × 10⁻³ m/s

v = 5.83 × 10⁻⁴ m/s



1)Pulmonary artery

2)Pulmonary vein

3)Aorta

4)Inferior vena cava



Answer and I will give you brainiliest

Answers

Answer : Pulmonary artery

see the picture and here is the name of it

A = Pulmonary artery

B = inferior vena cava

C = aorta

D = left ventricle

E = right ventricle

F = pulmonary system in kidney

G = Pulmonary system

H = Pulmonary vein

For moderators that see this

#Moderators please don't be mean, dont delete my answers just to get approval from your senior or just to get the biggest moderation daily rank.

can someone please answer this for me ❤️

Answers

Answer:

I don't understand the question

Explanation:

sorry I cant help because I am just a first former

Over an interval of 4.0 s the average rate of change of the concentration of B was measured to be -0.0760 M/s. What is the final concentration of A at the end of this same interval if its concentration was initially 1.600 M?

Answers

Complete question:

Consider the hypothetical reaction 4A + 2B → C + 3D

Over an interval of 4.0 s the average rate of change of the concentration of B was measured to be -0.0760 M/s. What is the final concentration of A at the end of this same interval if its concentration was initially 1.600 M?

Answer:

the final concentration of A is 0.992 M.

Explanation:

Given;

time of reaction, t = 4.0 s

rate of change of the concentration of B =  -0.0760 M/s

initial concentration of A = 1.600 M

⇒Determine the rate of change of the concentration of A.

From the given reaction: 4A + 2B → C + 3D

2 moles of B ---------------> 4 moles of A

-0.0760 M/s of B -----------> x

[tex]x = \frac{4(-0.076)}{2} \\\\x = -0.152 \ M/s[/tex]

⇒Determine the change in concentration of A after 4s;

ΔA = -0.152 M/s  x 4s

ΔA = -0.608 M

⇒ Determine the final concentration of A  after 4s

A = A₀ + ΔA

A = 1.6 M + (-0.608 M)

A = 1.6 M - 0.608 M

A = 0.992 M

Therefore, the final concentration of A is 0.992 M.

Help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee I am going to follow youuu

Answers

Answer:

Answer 11

Explanation:

. Newton's law of gravitation, statement that any particle of matter in the universe attracts any other with a force varying directly as the product of the masses and inversely as the square of the distance between them

the ans is 11 and i’m sure darling dw


A high frequency sound will have a ?

Answers

Answer:

The frequency of a sound wave is what your ear understands as pitch. A higher frequency sound has a higher pitch and the lower the period

Answer:

High-frequency sound waves produce high-pitched sounds, and low-frequency sound waves produce low-pitched sounds.

Which of the following best defines effective listening?

Answers

Answer:

The following seems to be the summary including its given phrase.

Explanation:

The willingness to adequately consider the knowledge another speaker provides as well as show interest throughout the subject covered constitutes skills of effective listening. Truly wonderful hearing skills require an individual just to listen fully to the information such that a relevant reading of the information or a piece of evidence can be done.

Is inertia a force (will give brainleist for first answer)

Answers

Answer:

Yes.

Explanation:

Answer:

I do believe it is. (more characters for character limit)

Other Questions
Why did Steve and Vic focused on smaller cities rather than Silicon Valley Please read this lab exercise thoroughly, before attempting to write the program.Write a program that reads the pairs of group number and student count from the text file (user must enter name of file) and:Displays the number of groups in the file (5 %)Displays the number of even and odd student count (5%)Displays the sum of the even student count and the sum of the odd student count as well as the sum of all the student count (5%)Displays the group numbers of the largest student count and the smallest student count (5 %)Computes the average of the largest and smallest student count (10 %)Compute the sum of ALL the digits in the largest student count (i.e. 952 Sum is 9+5+2 = 16) (15 %)Assume the contents of the file are as follows but that the pairs of data can change later:1 252 1233 4754 615 776 9107 2348 1389 13410 9511 67412 34513 3114 21115 95216 87317 2218 719 87620 34721 450The following is a sample output: User input in redWhat is name of the input file? integers.datThe number of groups in the file is 21There are 12 odd student count and 9 even student countThe sum of the odd student count is 2645The sum of the even student count is 4390The sum of all the student count is 7035The group number of the largest student count is 15The group number of the smallest student count is 18 The average of 952 and 7 is 479.5The sum of all the digits in the largest student count is 16NOTE:Use two decimal point precision for the averageTo check your code, adjust one of the student count in the file, recompile your code and run again (suggest changing the largest or smallest student count )Even though there are 21 pairs of numbers in the file, the program should NOT presume there will always be 21 pairs of numbers. In other words, you should not solve this problem by declaring 21 pairs of values. If I choose to use another integers.dat file other than the one provided with the assignment, your program should still work correctly with that file as well. All you can assume is that a series of integers will be read in from the file. Therefore, you need to implement a solution that uses the repetition control structures (for, while, dowhile) in the reading and processing of these values to produce your output. Find the sum. Write your answer in simplest form.3 8/9 + 1 5/124 36/475 11/364 13/225 1/4 Find the area of the composite figure.A) 22mB) 26mC) 30mD) 34m If + 100 = 1560, find the value of H and B please help a friend out with nP5 nC4 = 144 PLZ HELP ME PLZZZ I WILL GIVE BRAINLIEST......I REALLY NEED THE ANSWERS. $3.00 SummaryEach word is $0.10Answer the Essential Question: How do I add or subtract radical? Haydee washes cars to earn money. She can wash 5 cars in 4 hours. Sheearns $16.00 for each car.Haydee is saving up to buy a new computer that costs $620.00.How many hours does Haydee need to work to earn enough money topurchase the computer? solve the equation 8(x+7)=-24 I readyHelp ASAP!!! Which set of points would NOT define function? F) (-2,-2),(-1,-1),(0,0),(1,1),2,2) G) (-2,9), (0,1),(1,0),(3,4),(4,9) H) (-1,0),(0,1),(0,-1),(3,2),(3,-2) J) (-6,2),(-5,1),(-4,0),(-3,1),(-2,2) Which of these is NOT a description of the mantle. It is liquid, melted rock. O It has currents like the ocean. O It is the thinest layer of the Earth o It makes up 70% of the Earth's volume. HELP DONT HAVE LONG. WILL BE GIVING THANKKS AND STUFF Use a calculator to solve the equation.k/6.8 + 99.8 = 12.1 The solution is k =__. log10^t > log10^2 2 2 Which influence does Alvarez write about in this passage?her familyher neighborsher friendsher personal experience A ladder of length 5 m is placed against a verticalwall with its foot 1.8 m away from the base of thewall. How far up the wall does the ladder reach? What expression as a sum of 11/12 What are the four major abstract elements/subjects you can address in a literary analysis thesis?A. Characterization, Theme, Tone, & MoodB. Characterization, Tone, Mood, & Figurative LanguageC. Characterization, Language, Tone, & MoodD. Theme, Meaning, Attitude, & Atmosphere Help Pls!!! Will give brainliest