# Posts by Anon

Total # Posts: 3,111

**Physics**

A 6.50 horsepower self propelled lawn mower is able to travel at 0.56 m/s, starting from rest, in 0.050 s. If the lawn mower has a mass of 48.0 kg, what distance does the lawnmower travel in that time? (1 hp = 746 W)

**Chemistry**

One liter of a buffer composed of 1.2 M HNO2 and 0.8 M NaNO2 is mixed with 400 mL of 0.5 M NaOH. What is the new pH? Assume the pKa of HNO2 is 3.4.

**Induced current, EMF.**

What is the maximum magnitude of the induced current in mA and how many times does this occur per second? ------------------------------- For the second part of this question since I know the Angular Velocity (w) of a rotating coil with experiences this current can I use f=w/...

**Chemistry**

write unbalanced oxidation and reduction reactions for the following processes: Mn³?(aq) ? MnO?(s) + Mn²?(aq)

**Math (Calculus)**

Okay I changed C) and used one less term and got 0.31028 as the answer. What does that mean?

**Math (Calculus)**

The prompt for this question is f(x) =sin(x^2) A)Write the first four terms of the Maclaurin series for f(x) B)Use the Maclaurin series found in Part A to approximate the integral from 0 to 1 of sin(x^2) dx C)How many terms are needed to find the value of the integral given in...

**Math (Calculus)**

How can I sketch a graph of the first two partial sums for the following power series: Sum(n=1 to infinity) ((2x+5)^n) / (n(4^n))

**Math (Calculus)**

Consider the curve represented by the parametric equations x(t)= 2+sin(t) and y(t)=1-cos(t) when answering the following questions. A) Find Dy/Dx in terms of t I got tan(t) B) Find all values of t where the curve has a horizontal tangent. I got (+-)(pi)(n) C) Find all values ...

**Math**

I actually do not know how to do the rest, I am completely lost on this. For part A, when writing the first terms, are they just: x^2 -x^6/3! + x^10/5! - x^14/7! or do I have to plug in numbers 1 through 4, and then solve to get the first four terms?

**Math**

The prompt for this question is f(x) =sin(x^2) A)Write the first four terms of the Maclaurin series for f(x) B)Use the Maclaurin series found in Part A to approximate the integral from 0 to 1 of sin(x^2) dx C)How many terms are needed to find the value of the integral given in...

**Math**

So the answer to B is t=+- (pi)(n) and for C it is (pi/2)(+-)(pi)(n)

**Math**

Consider the curve represented by the parametric equations x(t)= 2+sin(t) and y(t)=1-cos(t) when answering the following questions. A) Find Dy/Dx in terms of t B) Find all values of t where the curve has a horizontal tangent. C) Find all values of t where the curve has a ...

**Math**

50 = 1/2 ? (4.88)² dr/dt Can someone solve this?

**Math**

How do you find the radius of convergence and interval of convergence for the following? Sum(n=1 to infinity) ((2x+5)^n) / (n(4^n))

**Math**

So for B and C, how can I show the answer if it continues on? and could you help me with part D?

**Math**

Consider the curve represented by the parametric equations x(t)= 2+sin(t) and y(t)=1-cos(t) when answering the following questions. A) Find Dy/Dx in terms of t B) Find all values of t where the curve has a horizontal tangent. C) Find all values of t where the curve has a ...

**Math**

The prompt for this question is f(x) =sin(x^2) A)A. Write the first four terms of the Maclaurin series for f(x) B)Use the Maclaurin series found in Part A to approximate the integral from 0 to 1 of sin(x^2) dx C)C. How many terms are needed to find the value of the integral ...

**Math**

Sum(n=1 to infinity) ((2x+5)^n) / (n(4^n)) Can someone write out the steps to finding the center point for this power series?

**Induced current.**

(c) Find an expression for the magnitude of the induced current in the loop at time t, in terms of the symbols above and appropriate constants. What is the maximum magnitude of the induced current in mA and how many times does this occur per second? ---------------- So using I...

**Mathematical Range.**

Apologies. I am heavily dyslexic and I find this very difficult to grasp. I have two graphs with x and r as the variables. I am trying to state the range in which the values of this graph meet a certain criteria. For graph 1 I have found the range to be +-3 to +-11.1. And ...

**Physics **

A 2200. Kg vehicle is traveling at 26 m/s what is the force needed to stop it in 21 seconds?

**Maths, equations.**

Thanks Damon.

**Maths, equations.**

Hi all, I have the following table: N B 1 7.854 2 15.708 3 23.562 4 31.416 5 39.27 6 47.124 7 54.978 8 62.832 9 70.686 10 78.54 Since each increment of N will lead to an increase of the value of B by 7.854 can I represent it as such? B(N)=N(x) where x=7.854 and N can be a ...

**Chemistry**

Ksp for AgBr is 5x10-13. What is the maximum concentration of silver ion that you can have in a 0.1 M solution of NaBr?

**Physics**

From the standpoint of energy and power, what are the advantages for a car with high horsepower? What are the disadvantages?

**Physics, emf, magnetic flux**

Thank you both, I understand differentiation however I would be interested to see the other way for completeness should you have time. My only question is how would I best relate the R for resistance to the magnetic flux equation would I be using faradays law here?

**Physics, emf, magnetic flux**

A circular loop of wire with radius 0.100 m and resistance R = 5.00 ?. The loop is placed in a magnetic field of strength B = 0.125 T, which can be rotated. The angle of the magnetic field with respect to the normal of the loop is ?(t), where t denotes the time. Initially, ?(0...

**Physics**

Which of the following is true about electric field lines? A) They point tangentially around a circle centered on a charge. B) They point away from positive charges and towards negative charges. C) They point away from negative charges and towards positive charges. D) None of ...

**Physics**

The electric field strength at a particular distance from an electric charge is 2.0 N/C. What is the electric field strength if you are 2 times closer to the same charge?

**Physics**

For an electric dipole, the electric field lines . . . A) Either start on the negative charge and go off infinitely or arrive from infinity and terminate on the positive charge. B) Either start on the positive charge and go off infinitely or arrive from infinity and terminate ...

**Citations**

Okay thank you

**Citations**

Is this sentence fine? Or should I remove the name of the website from my sentence and put it in parentheses at the end? According to Bernie Sanders . com, he is "a fearless, experienced leader capable of seeing the truth, and standing up to big private power, even when ...

**math please answer quick!!!**

21/70=0.3 so yes, you are correct

**social studies**

Why did the United States become involved in Mexico's civil war? Select all that apply. 1)Relations had weakened between the United States and the new government. 2)Mexico was unable to end the war without U.S. intervention. 3)The United States provided troops to support ...

**English**

One possible theme of call of the wild could be that only the strongest survive. Explain how this relates to darwins theory of natural selection and the survival of the fittest. Do you agree or disagree with this idea? Is there one aspect in which you agree but another with ...

**Capacitor**

One plate is positively charged and the other negatively charged, charges of equal magnitude but opposite signs are transferred between the two which leads to a potential difference between the plates. The capacitance which is measured by its SI unit the farad. Which is simply...

**Capacitor**

I have a question regarding a pair of conducting plates. My question states: "if this device operates as a capacitor, how is it able to store electrostatic potential energy?" is the answer: The charge separation between the plates causes an internal electric field. ...

**US GOV- Research Paper**

I'm writing a research paper about Bernie Sanders. It includes a short biographical background, information about his time in the House and the Senate, and his beliefs on 3 major issues: racism, foreign policy, and healthcare. I've written most of the paper, and I'...

**Resistance, Circuits**

apologies it stands for Platinum Resistance Thermometer.

**Resistance, Circuits**

A PRT consists of 9.0 m of wire of diameter 8.0×10?2 mm. The voltmeter reads 0 V when l1 =0 .44m. If the standard resistor, R, has a resistance of 224?, what is the resistivity of platinum?

**Circuits, Kirchoff**

Can someone help me to answer the following? (b) The circuit shown in Figure 1 can be used to measure the resistance of a platinum resistance thermometer (PRT). AB is a uniform resistance wire of length 1.0 m and C is a sliding contact on this wire. A standard resistor R is ...

**math**

1. A factory manufactures widgets. The rate of production of widgets after t weeks is (dx/dt) = 30(1-((20)/((t-20)^2))) widgets/week. A. Determine the rate at which widgets are produced at the start of week 1. Set up the expression but do not simplify. B. Determine the number ...

**Citations**

Ok thank you guys

**Citations**

I'm writing a research paper about Bernie Sanders and I'm including a quote from him in it. Do I need to put an in-text citation for the website where I found that quote or is it fine if I say that Sanders stated it. My sentence is: When asked about foreign policy, ...

**Circuits, Kirchoff**

A circuit can be used to measure the resistance of a platinum resistance thermometer (PRT). AB is a uniform resistance wire of length 1.0mandCisa sliding contact on this wire. A standard resistor R is included in the circuit. The position of C is adjusted until the voltmeter ...

**electric ?eld **

A uniform electric ?eld of magnitude 1.0×10^2 NC^?1 exists between two conducting plates, one of which is positively charged and the other of which is negatively charged. The plates are 10 mm apart. (a) Calculate the magnitude of the potential di?erence between the ...

**Charges, Coulomb, Electric Potential**

Two point charges with q1 = +3 .2×^10?7 C and q2 = ?4.8×10^?7 C are initially separated by a distance of r =2 .4×10^?4 m. (a) How much energy is required to double their separation? (b) What is the electric potential at the point midway between the two ...

**English**

One thing I related to was Gene's inner evil, and I think others can relate to that too. But I don't know how I could write a full essay about that

**English**

I have read the book but idk why I'm still stuck

**English **

High school students are still reading A Separate Peace more than forty years after its publication. Compose an essay describing what you think the book's enduring relevance is. What do the characters and the conflict say to people today? Do you imagine the book will ...

**English**

Actually I think the answer for the first question is A

**English**

Can you please check these questions not just give a link to sparknotes. These questions are for the book "A Separate Peace" by John Knowles. For Gene, jumping from the tree seems to be a way to a. reject his past life of conformity b. gain new respect from his ...

**American Government**

Oh okay I haven't even started writing yet

**American Government**

I'm writing a research paper about amending the U.S. Constitution. It has to outline the procedures for amending the constitution, and explain the path of one successful amendment and one unsuccessful amendment. What would be a good title for this paper? All I can think of...

**Math**

You need to isolate x, so how do you think you can do that?

**Physics**

A 2.5 kg falcon soaring at a height of 500 meters has a certain potential energy. Now suppose the falcon were carrying a 1.0 kg snake. What would the new height be if the total potential energy were to remain the same?

**Physics**

What is the height of a 2.00 kg object if its potential energy is 100 J?

**Physics**

Which has more potential energy: a 1.0 kg ball at a height of 10 m, or a 10 kg ball at a height of 1.0 m? Show all work.

**Physics**

How much potential energy is required to lift a 50 gram arrow to a height of 100 meters?

**Physics**

Calculate the potential energy of a 40 gram sparrow resting on a branch 30 feet above the ground. (Hint: 1 foot = 0.305 m)

**Physics**

Calculate the potential energy of a 6.3 kg eagle flying at a height of 75 m.

**Physics**

Calculate the potential energy of a 5.0 g (0.005 kg) paper airplane 5.0 meters above the ground

**Math**

Ten septdecillion

**Social Studies**

compare and contrast the views of the federalist party and the democratic republican party on at least three different historical issues?

**Math**

Thanks for explaining :)

**Math**

I spent $24 on a present for my sister. This was three fourths of all the money I had in my wallet. How much money did I have before I bought the present? I need help

**Gravity, fields**

Question 1) Consider two point-like objects, A and B, the first of which has four times the mass of the other (i.e. MA = 4MB). They are placed a certain distance d apart. (i) Sketch (in 2-dimensions) the gravitational field lines that are present in the region of space around ...

**Universal gravitation, fields**

Really basic question but I wanted to just double check something. Im trying to work out where to place a point particle between two objects (one has a mass 4 times the other). Now ive used very basic approximations as its just a rough idea I need so ive taken the mass of one ...

**Borrowing money**

Derek used her credit card to buy a hay ride for him and his friends. The ride cost $500 plus 5% GST. He did not pay his bill within the grace period and must pay interest on his bill. The interest rate is 15% compounded daily from the date of purchase. A) What is the total ...

**Geometry **

Write a coordinate proof to show that triangle FGH congruent triangle FDC

**English**

Write a description that would suit your talents (athletic, intellectual, logical, musical, etc.) perfectly. Make the game up so it's fun for other people to play as well. Be sure to include a list of equipment and 3 or 4 rules. You might also want to describe a sample ...

**APUSH**

This was during Andrew Johnson’s presidency

**APUSH**

How did debate between moderate and radical republicans led to a power shift between Congress and the presidency?

**Physics**

A person exerts a force of 28 N on the end of a door 84 cm wide. What is the magnitude of the torque if the force is exerted a. perpendicular to the door? b. at a 45 degree angle to the face of the door? c. parallel to the door?

**Physics**

A workman uses a wrench to apply a 100 N force at a distance 0.15 meters away from the center of a bolt. Calculate the torque created by this force.

**Calculus**

The acceleration function (in m/s2) and the initial velocity v(0) are given for a particle moving along a line. a(t) = 2t + 2, v(0) = ?3, 0 ? t ? 5 (a) Find the velocity at time t. v(t) = t^2+2t-3 m/s (b) Find the distance traveled during the given ...

**Calculus**

The first part was correct and I got 155/3 m for B however, my homework system won't take that answer and doesn't want it as a decimal either. That is the answer, correct?

**Calculus**

The acceleration function (in m/s2) and the initial velocity v(0) are given for a particle moving along a line. a(t) = 2t + 2, v(0) = ?3, 0 ? t ? 5 (a) Find the velocity at time t. v(t) = ______ m/s (b) Find the distance traveled during the given time...

**Physics**

A 58.7-kg lead ball is dropped from the Leaning Tower of Pisa. The tower is 55.0 m high. A) How far does the ball fall in the first 3.08 seconds of flight? = 46.5 m B) What is the speed of the ball after it has traveled 2.10 m downward? = 6.42 m/s C) What is the speed of the ...

**Physics**

A submarine of mass 2.55 × 106 kg and initially at rest fires a torpedo of mass 254 kg. The torpedo has an initial speed of 100 m/s. What is the initial recoil speed of the submarine? Neglect the drag force of the water.

**Government**

There is now a great controversy over the amount of monetary awards that are granted to plaintiffs in malpractice lawsuits brought against doctors and other medical personnel by patients. For instance, James Nelson dies of cancer and his widow feels that he did not receive ...

**Help**

Thank you!!

**Help**

I tried the two results under Grammarly and they are saying that there is no plagiarism. I got really unsure about sending in my answer after Grammarly said that there was plagiarism but I think I will keep it the same now. Do you agree or should I change it?

**Help**

A while ago, when i put my paragraph into Grammarly, I rechecked it multiple times. Sometimes, it said that that there was plagiarism and sometimes it said that there wasn't any. Now when I check it multiple times it says that there is no plagiarism, even though I didn'...

**Help**

Is the Grammarly plagiarism checker reliable? I put one of my short answers in there a while ago and it said that there was significant plagiarism. Now, about one-two weeks later, I put in the same paragraph and it is saying that there is no plagiarism. I am confused now and ...

**Physics**

A pipe has a cross sectional radius of 6.00 cm and is carrying water moving at .380 m/sec. If the pipe narrows to a radius of 3.50 cm, what will be the speed of the water in the narrow segment? What is the flow rate in each segment? thank you!!!!!!!

**Biology**

Imagine you start an experiment with two vials of flies. One fly vial has 20 flies, the other has 200 flies. After 20 generations of mating, which vial has lost the most alleles across the genome? Has genetic variation increased or decreased within each vial? Has genetic ...

**Physics help**

A ladder of length 2L and mass M is positioned on level ground leaning against a wall such that the angle between the ladder and the horizontal is ?. The coefficient of static friction between the ladder and the wall and between the ladder and the ground is ?static = 0.65. The...

**Calculus**

A piece of wire 7 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral triangle. A. How much wire should be used for the square in order to maximize the total area? B. How much wire should be used for the square in order to ...

**Calculus**

A baseball team plays in a stadium that holds 51,000 spectators. With ticket prices at $10, the average attendance had been 49,000. When ticket prices were lowered to $8, the average attendance rose to 51,000 a. Find the demand function (price p as a function of attendance x...

**physics**

a block of stone has a density of 2.75 g/cm3. the block has a mass of 3.30 kg. it measures 6.00 cm wide by 8.00 cm high by L cm long. how do i find L? if the block was in water with density of 1000kg/cm3 what would the buoyant force on the block be? anything helps!! thank u

**Phychology CHECK my answers**

My answers have the star 1. The nervous system is the body’s ______________ network. (1 point) communication*** organization reactive production 2. The central nervous system (CNS) consists of the brain and the ___________. (1 point) heart neural network skeletal system ...

**Torque, Physics**

A ladder of length 2L and mass M is positioned on level ground leaning against a wall such that the angle between the ladder and the horizontal is ?. The coe?cient of static friction between the ladder and the wall and between the ladder and the ground is ?static =0 .65. The ...

**Math**

Find f. f?''(x) = 20x3 + 12x2 + 10, f(0) = 9, f(1) = 12

**English**

I agree :)

**English**

Omg... that is so sad but sadly very common in high school

**English**

That helps soo much thank you!

**English**

I have to write a 3 paragraph wisdom anecdote; a short story that teaches a lesson. I needed some help coming up with ideas for my anecdote. I have read examples of anecdotes, but I can't make up any story that teaches a lesson. Any help?? Story or moral ideas? Thanks!!!!!

**Math gr 12**

My bad *compounded daily

**Math gr 12**

Help! My friend let me borrow their notes and I don't know how they got these answers because they didn't show their work. Could someone please help me? *The answers are correct btw. David is flying from Detroit to Las Vegas. The airfare is $476. He can afford monthly ...