Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
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Calculating the boil-off rate of liquid helium
- NZPhysics
- · Replies 1 ·
Understanding cross product and direction of torque
- Orha
- · Replies 4 ·
Magnetic Force on Electric Currents
- Mikala
- · Replies 1 ·
Calculating Power of Tear Layer in Contact Lens Prescription
- AngelLegs
- · Replies 3 ·
Displacement current and magnetic flux through a wire loop
- gsmtiger18
- · Replies 1 ·
Magnetic Field in a Semi-Infinite Wire
- Adeel Ahmad
- · Replies 5 ·
Friction loss due to exit pipe to reservoir
- foo9008
- · Replies 5 ·
Ratio of angular speed with conservation of energy
- RoboNerd
- · Replies 9 ·
Why does a falling object gain kinetic energy equally per meter?
- RoboNerd
- · Replies 12 ·
Graphs relating to simple harmonic motion
- RoboNerd
- · Replies 7 ·
Calculating Moment of Inertia for Rotating Objects: A Kinetic Energy Problem
- RoboNerd
- · Replies 2 ·
Magnetic field change for induced current
- Sho Kano
- · Replies 12 ·
Finding the Angle of a Bar PQ using Geometry and Theta
- whitejac
- · Replies 1 ·
Question on pendulum and cord tension
- RoboNerd
- · Replies 5 ·
Finding accelerations of three masses on a pulley system
- Sahil Kukreja
- · Replies 4 ·
Finding the current in a solenoid
- kamhogo
- · Replies 3 ·
Electric field and work for a charged ring and sphere
- Adeel Ahmad
- · Replies 18 ·
Electric Field, Potential, and Work at a Point
- Adeel Ahmad
- · Replies 1 ·
Electromagnetic repulsion force
- erisedk
- · Replies 5 ·
Finding orbital speeds from gravitational force and centripetal acceleration
- RoboNerd
- · Replies 31 ·
Sound Wave Problem: Frequency of Note in Amphitheater
- i_hate_math
- · Replies 6 ·
Graph of stationary wave after moving for half period
- songoku
- · Replies 6 ·
Calculate the pressure difference between two points
- confusedperson
- · Replies 10 ·
How Does Microwave Oven Geometry Impact Food Temperature Distribution?
- Pau
- · Replies 1 ·
Pentaprism angle for 90° deviation and intensity loss
- Ichigo449
- · Replies 16 ·
Net force of object indicated in following diagram
- Evangeline101
- · Replies 6 ·
Forces 2 dimensions: How far have the tugboats moved the log
- Evangeline101
- · Replies 2 ·
Standing Wave Period for Third Harmonic Oscillation
- i_hate_math
- · Replies 8 ·
Question on force applied to an object hanging from a cord
- RoboNerd
- · Replies 11 ·
Physics 2 Electric Fields, Circuits, Magnetism
- Adeel Ahmad
- · Replies 2 ·
Potential energy in stretched spring
- RoboNerd
- · Replies 2 ·
Linking gradient of IV graph and resistance
- MBBphys
- · Replies 5 ·
Can't understand why the unit of Reluctance is At/Wb
- road2knowledge
- · Replies 3 ·
Junction affects the flow of water?
- foo9008
- · Replies 13 ·
Calculate max acceleration such that A does not slide
- Janiceleong26
- · Replies 8 ·
Conducting slab between the plates of parallel plate capacitor
- Tanya Sharma
- · Replies 25 ·
Horizontal Range (arrow fired max speed off moving horse)
- Cascade
- · Replies 9 ·
Archived How Does an Infinitely High Potential Wall Impact Quantum Wave Functions?
- stefan10
- · Replies 1 ·
Coordinates of the electric field vectors of a dipole
- JulienB
- · Replies 16 ·
Finding focal length from image distances at two positions
- Dan453234
- · Replies 18 ·
Two linear polarizers in series
- TheSodesa
- · Replies 6 ·
Can Henry Be Converted to Ohm?
- Physicsman567
- · Replies 1 ·
Three-process gas cycle: find temperatures and work, heat, internal energy
- kelvin56484984
- · Replies 1 ·
Simple wave problem - phase constant
- i_hate_math
- · Replies 6 ·
Three concentric spherical conductors -- Find the potential
- pondzo
- · Replies 19 ·
Adding vector components in two dimensions
- Square1
- · Replies 6 ·
Two-car collision with offset impact causing rotation
- Ryan Gajdzisz
- · Replies 2 ·
Car acceleration kinematics give average power
- late347
- · Replies 5 ·
Difference between two harmonic motion equations
- Rorshach
- · Replies 1 ·
Pressure in tank pipe -- Bernoulli Equations
- AnotherParadox
- · Replies 3 ·
Describe how acceleration varies kinematics problem
- late347
- · Replies 2 ·
Errors/ Uncertainty in measurement problem
- psycho_physicist
- · Replies 6 ·
Block on inclined plane in elevator starting with inertial frame
- EddiePhys
- · Replies 8 ·
Maximum force on lower block before upper block slips
- The Physics Moss
- · Replies 5 ·
Motion under influence of a resistive force
- Ananthan9470
- · Replies 3 ·
A screen with three slits and 1 gets blocked --> diffraction?
- ElectricEel1
- · Replies 3 ·
Series and Parallel Combination
- marcoforce
- · Replies 8 ·
How Does the Q1=Q2+Q3 Concept Explain Flow in Branch Pipes?
- foo9008
- · Replies 21 ·
Why weren't hydrogen and helium formed in stars?
- Jimmy87
- · Replies 6 ·
Double-Slit Experiment problem?
- brinstar
- · Replies 3 ·
Work function of cathode, visible light
- MienTommy
- · Replies 2 ·
Finding the second force when acceleration is in the third quadrant
- edgarpokemon
- · Replies 1 ·
How can water flow uphill from reservoir 1 to 2 through junction D?
- foo9008
- · Replies 8 ·
Perfectly elastic collision problem with no given values
- Balsam
- · Replies 3 ·
Calculating the net force acting on object in diagram
- Evangeline101
- · Replies 2 ·
How to Solve a Pulley and Spring Problem using Calculus
- Bama_Brian
- · Replies 11 ·
Derive the kinetic energy of a mass on two springs
- ramialsaiad
- · Replies 1 ·
Is BvR the correct EMF for a rotating disk?
- Vibhor
- · Replies 14 ·
Airsoft - range and energy question
- Mos
- · Replies 6 ·
Mass falling and pulling a cylinder without sliding
- Karol
- · Replies 24 ·
String tension when a sliding stick stops at OB = 3
- Hodol
- · Replies 5 ·
Gauge pressure at the bottom of a barrel
- Of Mike and Men
- · Replies 2 ·
Finding velocity when projectile hits ground after reaching maximum height
- edgarpokemon
- · Replies 5 ·
Components of force of 2 moving charges
- pondzo
- · Replies 1 ·
Why does the voltage drop across a diode change with increasing current?
- Alex Myhill
- · Replies 1 ·
Need help for question about spring oscillation
- JJ1122
- · Replies 3 ·
Which formula for minor loss in pipe flow
- foo9008
- · Replies 17 ·
Thermal expansion of a glass laser rod: length, diameter, volume
- Erenjaeger
- · Replies 6 ·
Deriving Electric Field Inside Plastic Rod Using Gauss's Law
- yeezyseason3
- · Replies 7 ·
Speed of projectile fired at 45° from 165m cliff at 175 m/s
- Kmol6
- · Replies 13 ·
Why is the sand acceleration term m(w^2)x, not -m(w^2)x?
- mystreet123
- · Replies 12 ·
1-D Lagrange and Hamilton equation gives different results.
- 13Nike
- · Replies 6 ·
Electron confined in a one dimensional box
- tboyers
- · Replies 1 ·
Angular Acceleration: Clarifying What αz is?
- oliampian
- · Replies 4 ·
Loss in energy of a ball dropped in a fluid
- Titan97
- · Replies 14 ·
Where does the magnetic field go for the electron?
- Amad27
- · Replies 13 ·
Magnitude and Direction of induced voltage
- rzn972
- · Replies 11 ·
Grade 11 Thermodynamics Question
- The Spanglock
- · Replies 5 ·
What Is the Intensity in a Triple-Slit Experiment?
- tboyers
- · Replies 1 ·
Equations used in Maglev technology
- totomyl
- · Replies 3 ·
How is V1 deduced to be zero in the last step here?
- califauna
- · Replies 9 ·
Is it possible to find refractive index from diffraction?
- JessicasPhysicsLife
- · Replies 1 ·
Perfectly Elastic Collision and final velocity of ball
- Balsam
- · Replies 1 ·
Use KVL to determine values of branch currents
- DevonZA
- · Replies 28 ·
Elliptic path, normal and tangential acceleration
- JulienB
- · Replies 35 ·
Power input/output, efficiency, and energy calculations for motor-generator system
- DevonZA
- · Replies 4 ·
Wrecking ball collision with vehicle: elastic and inelastic
- Jphil
- · Replies 6 ·
Charge on Capacitor in RLC Circuit
- Drakkith
- · Replies 5 ·
Which mass to use in a momentum change problem?
- nate99
- · Replies 4 ·
What increases in nucleus as a result of alpha and beta decays
- DiamondV
- · Replies 1 ·