Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Model of intrinsic semiconductor behaviour
  • jclough
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An airplane flying with a velocity
  • spacecadette
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Calculating Speed of a motion of a Circular Object
  • Jordash
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3
Writing Equations for Position, Velocity, and Accelerations as functions of time
  • Jordash
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3
How Do You Approach an Irregularly Shaped DC Circuit Problem?
  • Elbobo
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7
Simple Harmonic Motion and the Reference Circle
  • chantalprince
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8
Where along line is electric field zero?
  • Neliel06
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Coulumb's Law and force between charge
  • thrills4ever
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4
Solving for Net Force and Acceleration: Free Body Diagram Help
  • Lemon Mint
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5
3-Step Process of a Simple RC Circuit with Battery and an Open Switch
  • jan2905
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What Is the Cost to Operate a Transistor Radio for 300 Hours on Household Power?
  • wakefreak90
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Why Does Gauss' Law Seem Contradictory Outside a Charged Sphere?
  • joker_900
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4
Difference between calcultaed slope and slope given on the graph?
  • science_rules
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Calculating Wavelength of Radio 4 FM & Explaining Loss in Deep Valleys
  • manjula
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1
What is the Meaning of Cylindrical Vectors in Relation to Cartesian Vectors?
  • salman213
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5
Displacement and Average Velocity of a Whale
  • Turquoise
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4
2008 F=ma Olympiad Problems # 10 + 11
  • k1point618
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8
Understanding Electric Dipoles: Calculating the Electric Field Strength
  • jan2905
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3
Power line transmission question
  • maccha
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3
Waves traveling through a string
  • j88k
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6
How Much Energy Keeps a Rope Oscillating for 6.25 Seconds?
  • danvazb
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Resistor removed from circuit, which of the following will decrease?
  • jan2905
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10
Electric Field Due to a Charged Disk
  • jrz5036
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1
Need help solving for unknown components
  • blazeuofa
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7
DC Circuit Problem: Light Bulb A's Brightness
  • Elbobo
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7
Trajectory and parametric equation
  • crystalplane
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2
What is the tension in the string?
  • I_LuV_FiZiX
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5
How Thick Would an Infinite Plate Need to Be to Mimic Earth's Gravity?
  • quantize
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2
Radioactive Decay and Linear Graphing
  • nmacholl
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9
Can the Catapult Clear the Wall Without Violating Safety Rules?
  • darkblue
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1
Understanding the Spacetime Interval and the Condition for Simultaneity
  • theneedtoknow
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Energy conservation used to predict speed?
  • chops369
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No problem, happy to help! Keep up the good work.
  • Rola
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9
Height and Pressure Relating the Two
  • kurosaki_ichi
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21
Fluid Dynamics: Find the Pipe Radius at Height Increase
  • student 1
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7
Where Are the Hidden Loops in My Circuit?
  • summersun
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1
What Is the Pressure of 3.2gm of O2 Gas in a 4000ml Container at 100°C?
  • Heila
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Need Help with Physics Exam Questions?
  • Kwamw
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How to Find the Wind Component Parallel to a Dash Vector?
  • -EquinoX-
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Tension in ropes unevenly supporting a beam
  • Shambles
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Is Using the Tangent Direction to Determine dl in Work Calculation Incorrect?
  • Niles
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Impulse on a sliding block attched to spring
  • jan2905
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4
Need help with a diffractiongrating problem.
  • seanmcgowan
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5
Fission vs Fusion: Which is More Economically Feasible?
  • Precursor
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How Far Must a Rocket Travel from Earth to Weigh 1/100th of Its Surface Weight?
  • Stratosphere
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6
How Fast Was the Bullet After Passing Through the Ballistic Pendulum?
  • shigami117
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Particle Falling g=1m/s^2 how much time does it take to fall?
  • Jordash
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Electron and parallel plate question >
  • HelloMotto
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3
Proton Speed in Constant Magnetic Field
  • jan2905
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Describe the electron's subsequent circular motion
  • jan2905
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Quantum physics and wave lengths
  • poohead
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3
Disk on a Plank Acceleration and Displacement Calculations
  • sjewenp
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Solving the Puzzle: How Does the Magnetic Field Affect Balance?
  • caljuice
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What are the equations and solution for electrostatics?
  • asi123
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Catapult Projectile Question wow
  • dkbuono
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Electric fields created by charged particles
  • perfection256
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Calculating center of mass and moment of inertia using integrals.
  • m00npirate
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Uniform Electric Field Upward Electric Force Equals Weight. HELP
  • m_physics
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Calculating Minimum Radius for Circular Motion in a Vertical Loop
  • Thereheis
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3
AP Question involving Ideal Gas Law - Thermal Physics - Pressure
  • Mafi0z
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1LoT, heat needed to raise the temperature of oxygen.
  • lawtonfogle
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I am sure this is easy but i am stuck
  • Vane9488
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11
Gravitational potential of a thin ring
  • DerekDnl
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Net Electrostatic Force on a neg charge next to a pos charge inbetween a field
  • hopeless123
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Spherical surface surrounding charges find flux
  • phys62
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How to find the force of particles
  • itsmarasilly
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Collisions/Projectile Motion (AP Free-response)
  • TheFireFox
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Ding! Deep Drive to Center: Tracking the Ball's Flight
  • hthorne21
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Two Objects, Constant Acceleration, 1D Forces, Collision Question
  • Hotsuma
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Projectile Motion/Dropping an object from the sky
  • Amber430
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8
How do you calculate tension in the string?
  • hellokitty
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Understanding Sound Frequency: How It Remains Consistent Across Air and Water
  • jan2905
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Help rearranging this equation.
  • dwartenb89
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Standing Waves: 2m, 1m, 4m, 1.5m, 67cm - Which Doesn't Fit?
  • jan2905
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How Does a One-Dimensional Impulse Force Affect an Object's Motion?
  • 04yellowgt
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Doppler Effect: Sound Level at 40m from Source of 20dB
  • jan2905
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Finding Rectangular Coordinates
  • Jordash
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I have no idea where to start with this plane mirror question
  • thundercats
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Where Can I Find Old AP Physics Multiple Choice Questions?
  • marutisuzuki
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How Do You Calculate the Charges on Two Repelling Particles?
  • fallen186
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Optimizing Takeaway Delivery Speed: Ludo's Pizza vs. Moonlight Indian Takeaway
  • ViralRiver
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11
How High to Drop a 1kg Mass to Gently Touch an Egg with a Spring?
  • marc16250
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Finding the Angle in Projectile Motion
  • Robotics 1764
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Kichoff Simultaneous Equations
  • jase951
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What is the mass of a floating block of wood in oil and water?
  • laurenh19
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Sudmarine sonar/distance problem
  • brick
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Circular Acceleration Car rounding turn wrong statement
  • Jordash
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4
Gravitational force equation help
  • Stratosphere
  • · Replies 26 ·
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Black Body Radiation Homework: Energy/Sec on 1m2 Earth from Sun
  • __JR__
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6
Calculating Rocket Height for 1/100 Weight on Earth's Surface?
  • Stratosphere
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3
What Amplitude Makes an Ant Weightless on a Vibrating Rope?
  • jimbo71
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How Do Corrective Lenses Affect Vision in Myopia?
  • jan2905
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Total Internal Reflection: v1<v2, Angle of Incidence?
  • jan2905
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Normal mode of string in third harmonic
  • jimbo71
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How Do You Derive Temperature Conversion Formulas?
  • briteliner
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Equilibrium Forces on an Aerialist Walking a Tightrope
  • jonnyboy
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VHF Radio Experiment: Testing Antennas & Polarization
  • prime-factor
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Determining coefficients of friction of paper
  • Omega234
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Why Are Carnot Engines Not Built in Real Life?
  • xinlan
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9
Entropy of Ice-Water: Solving the Puzzle
  • anubis01
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2