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Introductory Physics Homework Help

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  1. micromass

    Guidelines for students and helpers

    Sep 23, 2014
    2
    42,860
    Replies: 2
    9
  2. Mark44

    Hey! I posted here but now it's gone!

    May 10, 2014
    0
    16,491
    Replies: 0
    6
  3. Doc Al

    Introductory Physics Formulary

    Mar 17, 2012
    6
    116,416
    Replies: 6
    18
  1. Beth N

    Writing Force equation in terms of pressure and area

    Aug 18, 2018 at 6:47 AM
    3
    82
    Replies: 3
    0
  2. Cicicicici

    Direction of magnetic field experienced by wire

    Aug 18, 2018 at 5:47 AM
    3
    136
    Replies: 3
    0
  3. baldbrain

    Reaction time while stopping a car

    ... 2
    Aug 18, 2018 at 4:34 AM
    27
    207
    Replies: 27
    2
  4. helios1234

    Conductors in capacitor equal but opposite charge?

    Aug 18, 2018 at 4:07 AM
    2
    78
    Replies: 2
    0
  5. ubergewehr273

    Resolution of vectors for problems related to mechanics

    Aug 18, 2018 at 3:00 AM
    16
    172
    Replies: 16
    0
  6. ValerieL

    Displacement Problem

    Aug 17, 2018 at 10:53 PM
    3
    80
    Replies: 3
    0
  7. srekai

    Balancing a Uniform Board

    Aug 17, 2018 at 9:34 PM
    1
    69
    Replies: 1
    1
  8. Jozefina Gramatikova

    By calculating a Taylor approximation, determine K

    N/A
    –
    –
    Replies: –
  9. jxj

    Isolating Variable in Equation for conservation of momentum

    Aug 17, 2018 at 9:42 AM
    16
    227
    Replies: 16
    6
  10. Dgeld

    Electric field question

    Aug 17, 2018 at 8:59 AM
    7
    129
    Replies: 7
    1
  11. NicolaiTheDane

    Uncertainty question

    Aug 17, 2018 at 7:41 AM
    2
    85
    Replies: 2
    1
  12. subzero0137

    Thermodynamics problem

    Aug 17, 2018 at 12:12 AM
    3
    98
    Replies: 3
    0
  13. navneet9431

    Problem in calculating work done?

    Aug 16, 2018 at 11:04 PM
    3
    91
    Replies: 3
    2
  14. srekai

    Average Vector Acceleration Along a Curve and a Straight Section

    Aug 16, 2018 at 10:09 PM
    4
    186
    Replies: 4
    3
  15. KezPhysics

    How long does it take a 1ms pulse of light to travel 20m

    Aug 16, 2018 at 6:51 PM
    11
    234
    Replies: 11
    4
  16. Beth N

    Centripetal Force: Find banking angle on a roadway

    Aug 16, 2018 at 6:19 PM
    15
    338
    Replies: 15
    9
  17. Physics53

    Finding the mass of a photon with given wavelength

    Aug 16, 2018 at 5:10 PM
    5
    105
    Replies: 5
    0
  18. Exath

    Rotation of Rigid Bodies: Rotating stick with disc on top

    Aug 16, 2018 at 4:50 PM
    9
    117
    Replies: 9
    1
  19. Jozefina Gramatikova

    Find the tangent plane given at the stationary point.

    Aug 16, 2018 at 2:19 PM
    4
    129
    Replies: 4
    0
  20. Beth N

    Circular motion: normal force on a loop

    Aug 16, 2018 at 8:13 AM
    7
    222
    Replies: 7
    3
  21. AutumnBeds

    Force of an Expanding Ingot

    Aug 16, 2018 at 7:59 AM
    4
    490
    Replies: 4
    0
  22. Gregs6799

    Calculate the efficiency of a furnace’s heat transfer process

    Aug 16, 2018 at 7:57 AM
    9
    245
    Replies: 9
    0
  23. jxj

    Help with proportionality and literal equations

    Aug 15, 2018 at 9:38 PM
    17
    259
    Replies: 17
    9
  24. Jozefina Gramatikova

    Vector calculus- region-density-mass

    Aug 15, 2018 at 6:33 PM
    4
    119
    Replies: 4
    1
  25. navneet9431

    Calculation of work done by a variable force

    Aug 15, 2018 at 1:42 PM
    8
    156
    Replies: 8
    1
  26. Krushnaraj Pandya

    Potential difference across capacitors

    Aug 15, 2018 at 11:37 AM
    3
    185
    Replies: 3
    0
  27. Jozefina Gramatikova

    Fractional uncertainty of g on the surface of the Sun

    Aug 15, 2018 at 10:21 AM
    5
    182
    Replies: 5
    0
  28. srekai

    Combining springs to match Force vs Extension Graph

    Aug 15, 2018 at 2:22 AM
    2
    106
    Replies: 2
    0
  29. Beth N

    Equilibrium of Rigid Bodies. Rafter. What is moment arm?

    Aug 15, 2018 at 12:22 AM
    1
    101
    Replies: 1
    0
  30. songoku

    First Law of Thermodynamics -- Are ΔU, w and q positive, negative or zero when ice melts at 0oC

    Aug 14, 2018 at 8:18 PM
    6
    234
    Replies: 6
    4
  31. Zahid Iftikhar

    Bernoulli Equation

    Aug 14, 2018 at 12:51 PM
    5
    233
    Replies: 5
    3
  32. Philip Land

    Quantum defect

    Aug 14, 2018 at 10:25 AM
    3
    108
    Replies: 3
    1
  33. alijan kk

    An inflated tyre suddenly bursts -- What is the temperature of the air?

    Aug 14, 2018 at 10:09 AM
    9
    239
    Replies: 9
    0
  34. ridiculoid

    Balancing a shaft using mrL and mr vectors

    Aug 14, 2018 at 2:52 AM
    1
    75
    Replies: 1
    1
  35. lolseeker2

    Launched Horizontally?

    Aug 14, 2018 at 1:22 AM
    1
    117
    Replies: 1
    1
  36. Felipe Lincoln

    Newton's law and double stars moving in circles

    Aug 14, 2018 at 12:46 AM
    15
    316
    Replies: 15
    9
  37. alijan kk

    Is 1 degree F > 1degree C ?

    Aug 13, 2018 at 11:34 PM
    14
    229
    Replies: 14
    2
  38. Alexthekid

    Simple harmonic motion of charged particles

    Aug 13, 2018 at 8:24 PM
    3
    116
    Replies: 3
    0
  39. John Greger

    Derive relative intensities

    Aug 13, 2018 at 7:00 PM
    1
    139
    Replies: 1
    0
  40. Fluxation

    EMF Oppsition in Adjacent Wires +/- Swing

    N/A
    –
    –
    Replies: –
  41. lolseeker2

    How do I solve this projectile motion problem?

    ... 2
    Aug 13, 2018 at 12:18 AM
    33
    441
    Replies: 33
    2
  42. JessicaHelena

    Which forces am I missing in the FBDs?

    Aug 12, 2018 at 7:42 AM
    9
    246
    Replies: 9
    0
  43. Sitakalyani

    Question about a statement by Albert Einstein

    Aug 12, 2018 at 6:26 AM
    5
    248
    Replies: 5
    1
  44. David Day

    Ratio of Inductance between 2 Solenoids?

    Aug 11, 2018
    3
    145
    Replies: 3
    1
  45. lordlarddallas

    Potetial Difference between center and point r

    Aug 11, 2018
    1
    127
    Replies: 1
    0
  46. Krushnaraj Pandya

    Direction of the force on a dielectric slab while being inserted into a capacitor

    Aug 11, 2018
    10
    293
    Replies: 10
    7
  47. Victim

    Capacitor problem with a beam balance -- balancing after changing the charge

    Aug 11, 2018
    3
    200
    Replies: 3
    0
  48. Krushnaraj Pandya

    Analyzing a circuit with multiple batteries

    Aug 11, 2018
    15
    238
    Replies: 15
    1
  49. Krushnaraj Pandya

    Changes in capacitor after dielectric inserted

    Aug 11, 2018
    17
    168
    Replies: 17
    4
  50. Krushnaraj Pandya

    Capacitor system problem

    ... 2
    Aug 11, 2018
    26
    230
    Replies: 26
    2
  51. PhysicsIsKillingMe

    Friction force on an inclined plane

    Aug 10, 2018
    3
    178
    Replies: 3
    0
  52. Joon

    Circular duct problem

    Aug 10, 2018
    4
    240
    Replies: 4
    0
  53. barryj

    Calculation about virtual image

    Aug 10, 2018
    2
    124
    Replies: 2
    0
  54. HCverma

    In the circular motion below, what will be the velocity?

    Aug 10, 2018
    14
    387
    Replies: 14
    6
  55. Bob22314

    Replacing speed with friction in formula

    Aug 9, 2018
    9
    215
    Replies: 9
    2
  56. TaylorHoward21

    Force and motion

    Aug 9, 2018
    5
    284
    Replies: 5
    1
  57. Beth N

    Projectile Motion: time it takes for projectile to hit truck

    Aug 9, 2018
    15
    236
    Replies: 15
    9
  58. Timothy Teo

    Difference between Vav and Vrms

    Aug 9, 2018
    6
    128
    Replies: 6
    3
  59. TaylorHoward21

    Am I setting up this kinematic equation properly?

    Aug 9, 2018
    3
    123
    Replies: 3
    1
  60. salah22441

    Finding the acceleration of the center of mass

    Aug 9, 2018
    2
    90
    Replies: 2
    0
  61. MARX

    Kleppner:Mechanisc: 7.33 Grooved cone and mass

    Aug 8, 2018
    12
    226
    Replies: 12
    0
  62. Beth N

    Newton’s Law of Motions: tension forces in a pulley

    Aug 8, 2018
    4
    134
    Replies: 4
    1
  63. John Greger

    Fine-structure constants

    Aug 8, 2018
    5
    220
    Replies: 5
    0
  64. Krushnaraj Pandya

    Analyzing a circuit with 1 point earthed

    ... 2
    Aug 8, 2018
    28
    347
    Replies: 28
    4
  65. Krushnaraj Pandya

    Find the equivalent capacitance of the circuit

    Aug 8, 2018
    12
    231
    Replies: 12
    8
  66. olaney

    E-field generated by constant current in a circular loop

    Aug 7, 2018
    12
    191
    Replies: 12
    0
  67. Nemika

    Behaviour of an accelerating beam of electron.

    Aug 7, 2018
    10
    446
    Replies: 10
    4
  68. Krushnaraj Pandya

    Capacitance from plates

    Aug 7, 2018
    4
    104
    Replies: 4
    1
  69. alejandromeira

    Metal Stick that falls by gravity inside a magnetic field

    Aug 7, 2018
    16
    379
    Replies: 16
    8
  70. Krushnaraj Pandya

    Capacitor+work energy theorem problem

    Aug 7, 2018
    18
    333
    Replies: 18
    2
  71. David Day

    After how many time constants is capacitor energy 1/4?

    Aug 7, 2018
    1
    121
    Replies: 1
    1
  72. Tachyonprince

    Mean free path of ideal gases

    Aug 6, 2018
    3
    155
    Replies: 3
    0
  73. Krushnaraj Pandya

    Simple capacitance problem

    ... 2
    Aug 6, 2018
    28
    224
    Replies: 28
    2
  74. Krushnaraj Pandya

    Capacitance of spherical capacitor

    Aug 6, 2018
    12
    227
    Replies: 12
    3
  75. themotionsickphoton

    I am building a power-bank for a project, out of capacitors

    Aug 6, 2018
    14
    388
    Replies: 14
    1
  76. John Greger

    Identify spectral lines

    Aug 6, 2018
    6
    240
    Replies: 6
    0
  77. Avinash Verma

    Gauss's law problem.

    Aug 6, 2018
    7
    173
    Replies: 7
    1
  78. says

    Total Angular Momentum of an odd-parity shell-model state

    Aug 5, 2018
    1
    165
    Replies: 1
    0
  79. Krushnaraj Pandya

    Simple question regarding capacitors

    Aug 5, 2018
    2
    108
    Replies: 2
    1
  80. Joon

    Polytropic process question

    Aug 5, 2018
    6
    170
    Replies: 6
    1
  81. Joon

    Power generated by the steam turbine

    ... 2
    Aug 5, 2018
    20
    269
    Replies: 20
    3
  82. Krushnaraj Pandya

    Potential difference in uniform electric field

    Aug 5, 2018
    8
    159
    Replies: 8
    0
  83. Krushnaraj Pandya

    Principle of a capacitor

    Aug 5, 2018
    5
    143
    Replies: 5
    0
  84. Barnt

    Velocity of a hollow cylinder at the bottom of an incline

    Aug 4, 2018
    9
    172
    Replies: 9
    0
  85. says

    Calculate velocity of the fastest neutron inside a 96Mo nucl

    Aug 4, 2018
    5
    156
    Replies: 5
    0
  86. Krushnaraj Pandya

    Field inside a conductor

    Aug 4, 2018
    2
    127
    Replies: 2
    1
  87. Joon

    Simple coefficient of performance question

    Aug 4, 2018
    6
    189
    Replies: 6
    1
  88. baldbrain

    River-boat problem (Relative velocity)

    Aug 4, 2018
    9
    192
    Replies: 9
    0
  89. Krushnaraj Pandya

    Electric field and potential at vertex of cube

    Aug 4, 2018
    9
    201
    Replies: 9
    0
  90. flutrpooch

    Fluid in a syringe

    Aug 4, 2018
    11
    371
    Replies: 11
    2
  91. Vatsal Goyal

    Circular motion

    Aug 3, 2018
    11
    177
    Replies: 11
    0
  92. DannyDon

    Determining minimum speed?

    Aug 3, 2018
    5
    166
    Replies: 5
    1
  93. Erickly

    Rayleigh's Criterion + Moon (What am I doing wrong?)

    Aug 3, 2018
    18
    260
    Replies: 18
    8
  94. Erickly

    Wave optics: Interference

    Aug 3, 2018
    12
    174
    Replies: 12
    0
  95. MathError

    Problem about a rigid body pulled by a mass

    Aug 3, 2018
    11
    301
    Replies: 11
    1
  96. John Greger

    Estimate ionization energy

    Aug 3, 2018
    9
    225
    Replies: 9
    3
  97. Suradanai

    Can someone help me to calculate the velocity at Stack Tip?

    Aug 3, 2018
    5
    153
    Replies: 5
    2
  98. Joon

    Simple reversed heat engine problem

    Aug 3, 2018
    2
    127
    Replies: 2
    1
  99. MARX

    Kleppner Mechanics: Disk and coil spring

    Aug 2, 2018
    6
    216
    Replies: 6
    0
  100. Loro

    Entropy of mixing

    Aug 2, 2018
    17
    431
    Replies: 17
    0
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