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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Force extension graph for copper wire
- shk
- · Replies 1 ·
Two rotating masses balanced by a third mass (rotational dynamics)
- Eirik
- · Replies 4 ·
Time in moving frame (v=0.6c, distance 3×10^8 m)
- gtguhoij
- · Replies 24 ·
Find the position of the electron at any time t
- PhysicsTest
- · Replies 7 ·
Maximum distance the airplane can cover
- aahil123
- · Replies 13 ·
Probability dependence on potential
- Kaguro
- · Replies 8 ·
Statics and friction -- Two articulated rods connected to blocks
- melanie1235
- · Replies 13 ·
Spring and friction energy calculation giving wrong final speed
- JoeyBob
- · Replies 6 ·
Voltage restriction for nodes on the same branch?
- asd852
- · Replies 9 ·
What Are the Results of the Millikan Oil Drop Experiment?
- lulu888
- · Replies 1 ·
Relationship between spectral distribution and Compton scattering
- Baal Hadad
- · Replies 13 ·
Compton Scattering: K, Wavelength Calculation
- Benlaww
- · Replies 2 ·
Heat related problem -- Mercury solidifying liberates some energy
- JennyLee1989
- · Replies 15 ·
Ideal gas law problem -- Pneumatic piston movement with air temperature changes
- JennyLee1989
- · Replies 11 ·
Finding velocity when electric and magnetic forces balance
- JoeyBob
- · Replies 28 ·
Can doubling the particle density in a fusion reactor increase energy output?
- jjson775
- · Replies 3 ·
Angular momentum after collision with friction and tension
- JoeyBob
- · Replies 10 ·
Rolling 3 objects on an inclined plane
- EnricoHendro
- · Replies 8 ·
Finding rotation rate from angular momentum with moment of inertia
- JoeyBob
- · Replies 5 ·
Problem related to a parallel plate capacitor
- PhysicsTest
- · Replies 15 ·
Mutual inductance and self-inductance in a ferromagnetic core
- charrotrust
- · Replies 2 ·
Finding angular acceleration from torque and moment of inertia
- JoeyBob
- · Replies 13 ·
How many neutrons are produced in nuclear fission?
- songoku
- · Replies 9 ·
Angular Momentum Problem: Torque after fall
- JoeyBob
- · Replies 4 ·
How does angle theta between points relate to displacement in circular motion?
- jamiebellend
- · Replies 2 ·
How to draw a reflected wave in optics
- bbbbb
- · Replies 1 ·
Are there situations in which Newton's laws are not fulfilled?
- Lucho G
- · Replies 14 ·
What's the angular acceleration?
- NTesla
- · Replies 33 ·
Ampere's law to find free current in a wire
- Benlaww
- · Replies 12 ·
Finding spring constant with two springs in series
- JoeyBob
- · Replies 7 ·
Equilibrium temperature in a homogeneous section (stationary regime)
- A13235378
- · Replies 1 ·
Eigenfunction proof and eigenvalue
- Andrei0408
- · Replies 2 ·
Magnetic field of the planar wave
- Andrei0408
- · Replies 5 ·
How Do I Perform a Galilei and Lorentz Transform?
- NoLook
- · Replies 1 ·
How do I solve a 2D asteroid problem?
- PolVD
- · Replies 3 ·
Projectile Motion in 2D: Solving for Maximum Range in Inclined Planes
- kshitij
- · Replies 4 ·
Coulomb force calculation between two charged particles
- JoeyBob
- · Replies 2 ·
Net gravitational force on m1 from three masses
- JoeyBob
- · Replies 17 ·
What is the general dependence of the phase velocity on wavelength in glass?
- Kavorka
- · Replies 2 ·
Gravitational acceleration calculation off by factor of 10000
- JoeyBob
- · Replies 9 ·
Forces Experienced On Moon and Earth - What is the mass?
- lola1227
- · Replies 14 ·
Inelastic collisions -- how is momentum conserved but not energy?
- richengle
- · Replies 5 ·
How Do Sign Conventions Affect Calculating Net Force on Charges?
- JoeyBob
- · Replies 7 ·
Ice pond with no friction -- how to get across?
- lola1227
- · Replies 13 ·
Energy of a photon scattered due to the Compton Effect
- PhysicsTruth
- · Replies 12 ·
Line Integral to Verify the Magnetic Field B
- StillAnotherDave
- · Replies 10 ·
Pendulum, Rotational Inertia and Center of mass
- bieon
- · Replies 8 ·
Electromagnetism -- What do charges have to do to create EM waves?
- bbbbb
- · Replies 3 ·
Is theta 60 degrees or 30 degrees when Io is given?
- bbbbb
- · Replies 18 ·
Calculate Wavelength Without Frequency
- bbbbb
- · Replies 2 ·
Finding mass of a hollow sphere by integration
- cwill53
- · Replies 1 ·
How Do You Calculate the Force Between Two Masses?
- JoeyBob
- · Replies 11 ·
Finding mass ratio when net forces are different
- JoeyBob
- · Replies 2 ·
Finding mass to resonate a system
- Kubix
- · Replies 15 ·
Changes in Work done with changes in the centre of mass of a tool
- Mimi3616
- · Replies 2 ·
Friction between a mass and a conveyor belt (ENGAA 2017)
- TomK
- · Replies 4 ·
Ball hitting racket - Momentum Question (ENGAA 2017)
- TomK
- · Replies 5 ·
Physics Pressure Problem (Systolic blood pressure of a giraffe)
- aryan15
- · Replies 2 ·
Ball's motion after one bounce off the ground - SUVAT Question (ENGAA 2017)
- TomK
- · Replies 4 ·
The resistance of an element shaped like a half-cylinder
- polibuda
- · Replies 21 ·
To calculate torque on a supported beam
- gnits
- · Replies 2 ·
What is the role of the projector operator in vector manipulation?
- LCSphysicist
- · Replies 1 ·
Why Did My Torque Sign Change in Rotational Equilibrium?
- JoeyBob
- · Replies 9 ·
Thermodynamics problem relating to Chemical Potentials
- JohnJ
- · Replies 3 ·
Graphing a vector equation in polar form on Desmos
- physicsfridayrose
- · Replies 5 ·
Calculate speed from elastic and inelastic collisions? (momentum)
- OscarF
- · Replies 12 ·
Nuclear fission calculation of energy released
- tahmidbro
- · Replies 9 ·
Find the electric field from charge density
- PhysicsTest
- · Replies 2 ·
Rotational Equilibrium Problem
- JoeyBob
- · Replies 2 ·
Motion Equation for a magnet on a spring
- Gonzalo Lopez
- · Replies 1 ·
Understanding Complex Circuit Configurations
- JoeyBob
- · Replies 24 ·
Physics Bloopers: Sound Level Problem Gone Wrong
- keydetpiper
- · Replies 1 ·
How to determine the number of meshes and loops in a circuit?
- asd852
- · Replies 4 ·
How does the magnetic force affect torque on a current-carrying wire?
- archaic
- · Replies 1 ·
Spring Constants problem at the High School level
- jamesgunn
- · Replies 9 ·
What is the refraction index of liver?
- LT72884
- · Replies 5 ·
Electron moles present in wire cross-section
- JoeyBob
- · Replies 7 ·
Forces from water and mercury changing until equilibrium
- UserUnique
- · Replies 14 ·
Average Kinetic Energy of molecules calculation
- tahmidbro
- · Replies 7 ·
Conservation of Angular Momentum -- Child jumping onto a Merry-Go-Round
- Mustard
- · Replies 18 ·
CO2 Sequestration and Cave Pressure Problem
- cwill53
- · Replies 12 ·
Why is ro = 0.2255 in fluid dynamics vortices?
- yecko
- · Replies 5 ·
Physical observables determined by quantum numbers: n, l, ml, ms
- indie452
- · Replies 1 ·
Electric field inside a uniformly charged spherical shell
- sroot
- · Replies 4 ·
Q-value calculation for proton collision with aluminum-27
- jjson775
- · Replies 6 ·
Are there kinematic equations that are not always true?
- Lucho G
- · Replies 12 ·
EM wave reflection and transmission through anti-reflective coating
- Mr_Allod
- · Replies 12 ·
Period of a metal rod oscillating in a magnetic field
- greg_rack
- · Replies 4 ·
Crane Lifting a Car -- Find the Work Done
- stphnls
- · Replies 1 ·
Chain problem with two different radii
- NDave96
- · Replies 2 ·
Electric field of a uniformly charged sphere with a spherical cavity using superposition
- baseballfan_ny
- · Replies 12 ·
Stuck on a black body radiation problem
- LCSphysicist
- · Replies 1 ·
How is the Answer to 3(d) Found in Simple Harmonic Motion Problem?
- tahmidbro
- · Replies 8 ·
Why Might a Math Solution Involve Doubling the Percentage Difference?
- tahmidbro
- · Replies 7 ·
Using Orbital Energy to Calculate Velocity
- JoeyBob
- · Replies 3 ·
I'm not sure which units I should convert this to
- KittyCat1534
- · Replies 8 ·
How to Solve Two Masses Connected by a Spring in Ground Frame of Reference?
- NTesla
- · Replies 43 ·
How is the Ideal Gas Law Derived from Temperature and Pressure Relationships?
- Kathhhriine
- · Replies 2 ·
Understanding Tension in a Physics Scenario
- JoeyBob
- · Replies 9 ·