• Physics Homework Help: Thermodynamics?

    Having a little trouble with this homework problem. I have about half of it finished, but having difficulties with the last two parts: A sample of a monatomic ideal gas occupies 5.00 L at atmospheric pressure and 300 K (point A in the figure below). It is warmed at constant volume to 3.00 atm (point B). Then it is allowed to expand isothermally to... show more
    Having a little trouble with this homework problem. I have about half of it finished, but having difficulties with the last two parts: A sample of a monatomic ideal gas occupies 5.00 L at atmospheric pressure and 300 K (point A in the figure below). It is warmed at constant volume to 3.00 atm (point B). Then it is allowed to expand isothermally to 1.00 atm (point C) and at last compressed isobarically to its original state. (a) Find the number of moles in the sample. I found the answer to be: 0.203 moles (b) Find the temperature at point B. I found the answer to be: 900K (c) Find the temperature at point C. I found the answer to be: 900K (d) Find the volume at point C. I found the answer to be 15 L (0.015m^3) (e) Now consider the processes A → B, B → C, and C → A. Describe how to carry out each process experimentally. Filled this question out already (f) Find Q, W, and ΔEint for each of the processes. When I try to calculate Eint for A -> B, I'm using nCv(delta t), with Cv = 3/2 R, but when I do this and submit the answer, I'm being told "Your response is off by a multiple of ten." (My answer that I was getting was 1518.97 for A -> B) (g) For the whole cycle A → B → C → A, find Q, W, and ΔEint. Any help for these last two parts would be greatly appreciated, I also attached a photo of the figure if it helps. Thanks!
    1 answer · Physics · 1 year ago
  • Physics homework help? Simple Harmonic Motion?

    I'm stuck on this problem, any help is appreciated: A particle moves along the x axis. It is initially at the position 0.150 m, moving with velocity 0.120 m/s and acceleration -0.400 m/s2. Suppose it moves with constant acceleration for 4.70 s. (a) Find the position of the particle after this time. (b) Find its velocity at the end of this... show more
    I'm stuck on this problem, any help is appreciated: A particle moves along the x axis. It is initially at the position 0.150 m, moving with velocity 0.120 m/s and acceleration -0.400 m/s2. Suppose it moves with constant acceleration for 4.70 s. (a) Find the position of the particle after this time. (b) Find its velocity at the end of this time interval. We take the same particle and give it the same initial conditions as before. Instead of having a constant acceleration, it oscillates in simple harmonic motion for 4.70 s around the equilibrium position x = 0. Hint: the following problems are very sensitive to rounding, and you should keep all digits in your calculator. (c) Find the angular frequency of the oscillation. Hint: in SHM, a is proportional to x. (d) Find the amplitude of the oscillation. Hint: use conservation of energy. (e) Find its phase constant ϕ0 if cosine is used for the equation of motion. Hint: when taking the inverse of a trig function, there are always two angles but your calculator will tell you only one and you must decide which of the two angles you need. (f) Find its position after it oscillates for 4.70 s. (g) Find its velocity at the end of this 4.70 s time interval. Thank you in advance.
    1 answer · Physics · 1 year ago
  • Chemistry question help?

    Having a little trouble with the following question for a chemistry lab, any help is appreciated. How will you prepare the following solutions from 6.0 M solutions of acetic acid and ammonia? Give exact details. Assume that a 10-mL graduated cylinder and a 100-mL graduated cylinder are available. a. 80 mL of 0.10 M HC2H3O2 b. 80 mL of 0.010 M NH3
    Having a little trouble with the following question for a chemistry lab, any help is appreciated. How will you prepare the following solutions from 6.0 M solutions of acetic acid and ammonia? Give exact details. Assume that a 10-mL graduated cylinder and a 100-mL graduated cylinder are available. a. 80 mL of 0.10 M HC2H3O2 b. 80 mL of 0.010 M NH3
    1 answer · Chemistry · 3 years ago
  • 4 pics 1 word question?

    I need help solving the word. Its 7 letters, letter choices are M I B L U A P F E R S. The four pics are an ekg readout, newtons cradle, some sort of joint, and a lightbulb being lit up and held in place by two hands
    I need help solving the word. Its 7 letters, letter choices are M I B L U A P F E R S. The four pics are an ekg readout, newtons cradle, some sort of joint, and a lightbulb being lit up and held in place by two hands
    2 answers · Words & Wordplay · 5 years ago
  • 4 Pics 1 Word question?

    I need help solving a level. The four pics are an ekg readout, newtons cradle, a lightbulb that is being held in place and is lit up by a hand on the bottom and one on the top, and the third looks like a joint or some type of little cell thing. Letters are: M I B L U A P F E R S. The word is 7 letters
    I need help solving a level. The four pics are an ekg readout, newtons cradle, a lightbulb that is being held in place and is lit up by a hand on the bottom and one on the top, and the third looks like a joint or some type of little cell thing. Letters are: M I B L U A P F E R S. The word is 7 letters
    2 answers · Words & Wordplay · 5 years ago
  • Black Ops 2 Origins Issue?

    I'm attempting the Origins Easter egg with a friend. We got to the invisible plane and invisible zombie part. We've shot down the plane, but when we got zombie blood the next round, the invisible zombie was nowhere to be seen, we also couldn't hear it. We looked in the sky and no plane. Is it possible we glitched? Is there something... show more
    I'm attempting the Origins Easter egg with a friend. We got to the invisible plane and invisible zombie part. We've shot down the plane, but when we got zombie blood the next round, the invisible zombie was nowhere to be seen, we also couldn't hear it. We looked in the sky and no plane. Is it possible we glitched? Is there something we're missing? What's going on D:
    1 answer · Xbox · 6 years ago
  • Black Ops 2 Origins issue?

    A friend and I are attempting the easter egg, but my friend disconnected. Now that he's reconnected, it won't let him re take the thunder fists. Is this common? Is there a way to fix this?
    A friend and I are attempting the easter egg, but my friend disconnected. Now that he's reconnected, it won't let him re take the thunder fists. Is this common? Is there a way to fix this?
    1 answer · Xbox · 6 years ago
  • Examples of how Jim is a father figure to Huck?

    In The Adventures of Huckleberry Finn, what are some examples from the book of Jim being a father figure to Huck? I need about 7 examples. Any help is appreciated! Thanks!
    In The Adventures of Huckleberry Finn, what are some examples from the book of Jim being a father figure to Huck? I need about 7 examples. Any help is appreciated! Thanks!
    2 answers · Words & Wordplay · 6 years ago
  • Tell me if this sounds like a good story?

    So I have two ideas for two different stories and I wanted some opinions on them Story 1: A western about a man who is hired to move a head of cattle across wherever and while he is gone, his home town is raided by a group of bandits, and the main character's family is killed. When the main character returns, somebody in the town claims they... show more
    So I have two ideas for two different stories and I wanted some opinions on them Story 1: A western about a man who is hired to move a head of cattle across wherever and while he is gone, his home town is raided by a group of bandits, and the main character's family is killed. When the main character returns, somebody in the town claims they saw the main character riding with the bandits and therefore everyone thinks he's a bad guy. The main character also learns that his family was killed, so he rides off with the town shooting at his heels. The plot of the story would be him tracking down the people responsible for the death of his family with bounty hunters on his tail all the time. Story 2: A story about a local pastor and farmer of a village (no time period determined yet) who discovers a small boy breaking into the small animal's coops and stealing/eating one almost every night. The pastor discovers that the small boy is a vampire or other type of creature requiring blood. The pastor then wanting to originally do away with this creature can't do it because he is a small child. The pastor takes him in and feeds him animals/animal blood, until the boy gets older and starts to crave more blood and starts to go sort of crazy. The pastor then would end up having to kill the creature that he had come to love during the time that he raised this misunderstood creature. any thought or opinions would be greatly appreciated :)
    1 answer · Mythology & Folklore · 6 years ago
  • What is the best class for PVP?

    In World of Warcraft what is the best PVP class?
    In World of Warcraft what is the best PVP class?
    1 answer · Video & Online Games · 7 years ago