Homework Definition and 998 Threads

Homework, or a homework assignment, is a set of tasks assigned to students by their teachers to be completed outside the classroom. Common homework assignments may include required reading, a writing or typing project, mathematical exercises to be completed, information to be reviewed before a test, or other skills to be practiced.
The effects of homework are debated. Generally speaking, homework does not improve academic performance among young children, because children need more sleep to develop and grow. Homework may improve academic skills among older students, especially lower-achieving students. However, homework also creates stress for students and parents, and reduces the amount of time that students can spend in other activities.

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  1. O

    MHB Need Help with Homework Questions? Let Us Assist You!

    I am trying to solve these questions for hours :/
  2. P

    Finding the efficiency of an ideal gas with adiabatic exponent 'γ'

    Here is what I did : work done in going from A to C, W1 = 2nRToln(2) (isothermal process) work done in going from C to B, W1 = pΔV = nRΔT = -nRTo (isobaric process) work done in going from B to A, W3 = 0 (isochoric process) so, total work done = W1 + W2 + W3...
  3. J

    I Bernoulli Trials Homework Problem

    this is the answer Is this right?
  4. Serhatakguc0

    Dynamics homework -- Motion of a stick attached to a rolling disk

    Hi everyone, I need help for this homework. I'm a mechatronics engineering student and i want to solve this question but no matter how hard I try, I can't solve the question. Sorry for my bad english...The disk connected to the AB stick with a length of 2 meters is rolled as shown in the figure...
  5. R

    Angular Velocity of a Car going around a curve

    θ=90°= π /2 so the instantaneous angular velocity dθ/dt= lim∆ t -> 0 (θ(t + ∆ t)-θ(t))/(∆ t) When I calculate it out it is π /2 radians per second. Is this correct?
  6. eedftt

    Mastering Physics Homework about Magnetic field

    Magnetic fields are sometimes measured by balancing magnetic forces against known mechanical forces. Your task is to measure the strength of a horizontal magnetic field using a 12-cm-long rigid metal rod that hangs from two nonmagnetic springs, one at each end, with spring constants 1.3 N/m ...
  7. aligator11

    Engineering Homework problem - Pendulum oscillatory system

    Hi All, Anyone willing to help out in explaining what eigenfreuqncy for this oscilatory system, would be? Also if anybody knows the equation to calulate this stuff please, if you're willing to share I'd be greatful! Thanks, regards.
  8. Kayla Martin

    Optical depth from radiative transfer equation

  9. B

    Electric Force and Field homework problem

    This is my homework. And we don't have online lessons. But my teacher gave this for homework. I couldn't solve this problem. Can you help me?
  10. vinamas

    Earth's magnetic dipole homework problem

    So I'm mainly having trouble with part b as I have successfully completed part a. In part b I get an answer of 6.3 x 10 ^8 Amperes which my homework tool flags as incorrect. I'm clueless as to where to go from there or why my approach is wrong?
  11. L

    Engineering Help with Homework: Solving a Math Formula

    i want to ask about my homework im not understand what to do with this formula :
  12. P

    Comp Sci MIPS assembly language homework

    All I have is li $t0, 0xaaaaaaaa li $t1, 0x24924924 move $s0, $t0 Because I think it is best to hardcode them in.
  13. suezxc6

    Comp Sci Need help with Fortran homework -- Error: Invalid form of PROGRAM statement

    program Lab5A implicit none ! This program introduces Fortran string handling capabilities character*26 upper, lower, name, cap character str*2, one*1 integer from, to, i, m lower = "abcdefghijklmnopqrstuvwxyz" upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"...
  14. R

    Waves Homework help -- Waves on a String

    Okay well I'm stuck on this one. I know that lamba times frequency is wave speed and 1/f is period. I think that the wavelength of the wave is four but what is the frequency? (1/2)? Would I multiply 4*1/2 to get 2 m/s as the wave speed and then if the frequency doubles to .25, the wavelength be...
  15. D

    Physics Homework about using Electricity to Heat Flowing Water

    This is the question: You want to make an electric instantaneous water heater in which 5.0 liters of water flows past a resistance per minute and heats water from 10.0 ° C to 45.0 ° C. Calculate the magnitude of the resistance to use and the amperage. The flow-through is connected to 230V So...
  16. C

    Standing Waves Homework: A Tuning Fork, a String and a Hanging Mass

    Hi guys, so I am struggling on the Standing Waves concept. I understand that these are waves that move in place but I don't know how to attempt this problem. Can someone set me on the right track?
  17. iamcgettigan

    How do you find the initial velocity of a projectile given angle/distance?

    I tried resolving the information given into vertical and horizontal components. I then tried to find time, as this is how I would find the initial velocity. However, I am unsure of how to use the angle in this problem to help solve it. I am also unsure of how to find the initial velocity only...
  18. B

    Dimensional Analysis for Multi-Layer Flow Equations

    Hello, New to the forum. I am looking for some help with some work. It is dimensional Analysis, i have done Dimensional analysis with the analysis bridge before. But i am stuck with the question below and trying to learn it. Any help much appreciated. I have the equation q = U A dT. But i am...
  19. physics_CD

    Understanding Total Voltage in Parallel Circuits

    I really don't have any clue why the total voltage is equal to the voltage drop over the 3 Ω and 2 Ω resistors and independent of the 4 Ω resistor . Does it have to do with parallel circuits?
  20. DMB

    Chemistry Integrated rate law homework equations Gen Chem II

    No idea how to solve
  21. V

    Calculate the margin of error in this physics lab

    Bounce 1, Trial 1-4: ha (height after bounce) (0.74+0.67+0.69+0.73)/4=0,7075 this is my mean value. Standard Deviation, s: 0.033040379335998 (calculated the value using an online standard deviation calculator) Sample size N: 4 sx̄ = s/√N = 0.033040379335998/√4≈ 0.0165 At a 95% confidence...
  22. E

    Help with Homework Equation: Input Impedance

    Homework Equation: I do not think I am getting the correct answer for this problem when I do it out by hand. Do I plug the necessary values into the equation shown above or do I say that because it is an infinite line that the characteristic impedance is equal to the input impedance? If the...
  23. Y

    Homework Help: Thermal Energy Question

    I don't know what to do!
  24. H

    Is [A-] greater than [H3O+] in a 1M solution of highly acidic HA?

    The question says: A solution of highly acidic HA is given, with a molarity of 1M. Is it true that [A-]>[H3O+] or not? I simply don't understand why the hydronium is mentioned and i don't know how to find the molarity of these two individually.
  25. RyanRhino

    Calculate the average force used to drag a box up a ramp

    I first wrote down that 55% = Eout/Ein I also know that W = (Facos20)(4) and I substitute it into the first equation 55% = Eout/[(Facos20)(4)] But I'm missing two variables here. Did i forget something or is the question missing some information?
  26. L

    Electromagnetic plane waves from a current sheet

    I have an infinite sheet (in lossless, homogeneous medium) of time-harmonic current in ##yz##-plane at ##x=−d##. The current density on this sheet is given by $$\mathbf{J}=\hat{z}J_0\delta(x+d)$$ ##δ(x+d)## is delta function. Moreover, there is a perfect electric conductor (PEC) half space at...
  27. radhxy

    Issac Physics 'Three Collisions' High School Homework - Kinematic

    Homework Statement: Three particles A, B, and C, each of mass 𝑚, lie at rest in that order in a straight line on a smooth horizontal table. The particle A is then projected directly towards B with speed 𝑢. The masses of A, B, and C are now 𝑚, 2𝑚 and 3𝑚 respectively: Again find the fraction of...
  28. CBuphyx

    Fourier transformation (was: Homework title)

    Summary: Homework Statement: Fourier Transform momentum space to normAl space Homework Equations: F(k)=e^-b|k| show that g(x)=(b/pi)×(1/(x^2+b^2)Hello,I need to that given function Fouirier transform and function of graphic. Thank you😃 Homework Statement: Fourier Transform momentum space to...
  29. M

    Engineering Homework: Rx=? to get maximum power transfer at point M

    Hi, after calculations I end up in the circuit below¨ (Thevenin equivalent) So now I have to say Rth=RL and I will find Rx ?The initial circuit is this: Thanks
  30. T

    Is there a simple injection from B to A using tangent function?

    So I don't really have any goods ideas on how to try and solve this. I only know that using tangent function is supposedly a good idea.
  31. B

    Not necessarily homework help but I do not understand Field lines

    Homework Statement: This is not for homework but I have an AP physics exam on field lines and am confused about the proportionality between the charges of objects and the number of field lines. Homework Equations: E=(k*q)/r^2 I am struggling with the number of field lines to put based on the...
  32. Duboo

    What is the relationship between angle and polarization in modern optics?

  33. Nimarjeet Bajwa

    How can we find the center of mass of a solid cone?

    is this method even possible? anyways here is my attempt Step1) y= 2H/3 ( H is the height of the cone) step 2) we take the density (ρ)= 3M/π R2 H. The problem i am facing is to Find "dm"
  34. S

    Calculus Homework Check (vectors/forces)

  35. Sai Maurice

    Temperature change brought about by radiation

    I tried modeling the problem quite a few ways. one was to say that the difference between the heat emitted by the room and the heat emitted by the bulbs would equal the heat absorbed by the room, and that could allow us to calculate temperature. This did not work. I'd appreciate your help
  36. D

    What Is Relativity in Physics?

  37. M

    Kinematics Homework Question- Deriving an expression

    I have been attempting this physics problem for a while now. I am not sure how to begin to attempt this problem with the equations of motion formulas.
  38. iram

    Biphysics Homework: Wrong Answer of P2/P1=R1/R2?

    Is it done by using the formula p2/p1= r1/r2? I got answer 2.3 cm but it comes out it is wrong. Why?
  39. C

    Trigonometry (re-moved to Precalc Math Homework)

    Homework Statement: (cos2A -1)/sinA +sin2A/(cos2A+1)*cosA=__________________ Homework Equations: sin2A=2sinAcosA cos2A+1=cos^2A cos2A-1=sin^2A (cos2A -1)/sinA +sin2A/(cos2A+1)*cosA [cos^2(2A)-1 +2sin^2(A)cos^2(A)]/sinA(cos2A+1) [-sin^2(2A) + 2sin^2(A)cos^2(A)]/sinA(cos2A+1) I can't proceed...
  40. P

    Stuck on a few Vector homework problems

    I'm stuck on a few Vector homework problems. I don't quite understand how to write vectors A+B and A-B for questions 1b and 2b. I tried starting with calculating the magnitude for vector A+B on question 1b and then followed by finding theta, but I'm not sure if that's what I'm supposed to do...
  41. Ahmad Qaimari

    Vectors physics homework -- Addition of two vector forces

    Trying to solve it
  42. B

    Question about the derivation of linear magnification

    I tried assumed ##\theta \approx sin \theta \approx tan \theta##. By Snell's law(after approximation), $$n_1 \tan( i_1)= n_2 \tan( i_2)$$ If ##\tan (i_1)=\frac {h_o}{ u}## and ##\tan (i_2)=\frac {h_i}{ v}##,then $$m=\frac {h_i}{h_o}=\mod{\frac {v n_1}{un_2}}$$ Which is the expected...
  43. P

    Finance loan interest rate homework

    I got 6.33% but apparently it's 3.2%
  44. T

    Homework Help - Transmitter for dP

    Hello. I've got a last homework before the summer, which is due to be handed in tomorrow. The question is the following: "How is it possible that a normal transmitter, used for measuring differential pressure, can get the label FT, PT, LT in a process scheme?" Of course, the labels stands...
  45. nineteen

    How to get the balanced redox equation in this sample problem?

    Summary: Our chemistry teacher gave a sample problem regarding balancing a redox equation. I managed to proceed to a considerable distance, but I can't seem to understand how to get the final balanced equation. Please help me out. The problem is; reaction of K2Cr2O7 with SO2 in the presence of...
  46. lwin

    Vectors Homework Help: Find Degree

    Can’t seems to find the degree
  47. TytoAlba95

    How can I arrange peptides with S-S bonds in order?

    I can't solve this at all. Please suggest some clues.
  48. C

    Tension on a massless pulley homework.

    please explain
  49. J

    B Earth Orbits of Geostationary Satellites

    Do geostationary satellites move with the Earth's orbit or do they not move at all?
  50. F

    Motion Homework -- A particle moving along the x-axis....

    Homework Statement The position function x(t) of a particle moving along an x axis is x = 6.00 - 7.00t2, with x in meters and t in seconds. Homework Equations (a)[/B] At what time and (b) where does the particle (momentarily) stop? At what (c) negative time and (d) positive time does the...
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