Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
How Do You Calculate the Inside Diameter and Mass Savings for Hollow Shafts?
- DevonZA
- · Replies 1 ·
Path length difference in microwave interference experiment
- Jimmy87
- · Replies 3 ·
Height differences from relative uncertainty of gravimeters
- AdrianMachin
- · Replies 3 ·
The intentsity out of two polarizers
- Rahulrj
- · Replies 5 ·
Torque equilibrium problem with two equal support forces
- Adam Rabe
- · Replies 23 ·
Two wheels rotating connected by a rod
- fedecolo
- · Replies 26 ·
A problem regarding the electric potential of an electron
- AdrianMachin
- · Replies 2 ·
Force/time graph acceleration problem
- No1_129848
- · Replies 21 ·
Change in the Earth's orbit radius from changing mass of the Sun
- Rwindsor1
- · Replies 5 ·
Calculate the airplane's acceleration
- ConfusedMonkey
- · Replies 4 ·
Wheatstone bridge voltages with 12V and three resistors
- control
- · Replies 10 ·
Dimensional analysis of dipole-dipole energy transfer probability equation
- HAYAO
- · Replies 7 ·
Finding the Angle When the Crate Begins to Slip
- Graydon Hope
- · Replies 6 ·
Archived Relative Motion in Two Dimensions
- vladittude0583
- · Replies 3 ·
Speed at Takeoff and Average Acceleration
- Olivia Tarca
- · Replies 8 ·
Problem involving thermal radiation and specific heat
- Wimpalot
- · Replies 11 ·
Percentage transmittance gamma ray through lead
- Adam Rabe
- · Replies 2 ·
2-body scattering and Mandelstam Variables
- Pizza Pasta physics
- · Replies 1 ·
Friction between cart and a surface covered with a liquid?
- Phys112
- · Replies 6 ·
Angular Velocity of a wheel problem
- Kallum
- · Replies 4 ·
Tone hearing frequency concept question
- Adam Rabe
- · Replies 15 ·
Thickness of a cylinder in a compound thin cylinder
- DevonZA
- · Replies 39 ·
What is with this projectile simulation?
- sohjau
- · Replies 1 ·
Moseley's law and the determination of the screening constant
- Arne H
- · Replies 3 ·
How to calculate wavelength electron given speed
- Adam Rabe
- · Replies 2 ·
Pulley System on a Big Block: Solving for Acceleration with Zero Applied Force
- Buffu
- · Replies 5 ·
Electric potential of charged concentric spheres
- FranzDiCoccio
- · Replies 3 ·
How Can I Calculate the Angular Speed of a Ring Rolling Without Slipping?
- Vibhor
- · Replies 31 ·
Tension in a rope hanging between two trees
- Buffu
- · Replies 7 ·
Elastic collision between falling ball M and stationary ball m
- Deadawake
- · Replies 16 ·
How to Calculate the Correct Fraction of Monatomic Molecules in a Gas Mixture?
- Jahromi24
- · Replies 8 ·
Falling Cantaloupe - Distance Above Ground
- Catchingupquickly
- · Replies 2 ·
Finding charge given the electric field at origin is zero
- paulie
- · Replies 1 ·
What direction does a compass point to in a magnetic field?
- Notaphysicsmajor
- · Replies 5 ·
How to Calculate Energy in EM Waves?
- Arman777
- · Replies 4 ·
Vertical and horizontal components,physics As level help :(
- Maryam9
- · Replies 5 ·
RLC circuit with initial conditions at t=0
- Arman777
- · Replies 36 ·
Trebuchet energy conservation equation for angular velocity
- timetraveller123
- · Replies 26 ·
Why does the horizontal distance L contract in the Michelson-Morley experiment?
- Karol
- · Replies 3 ·
Inclined plane in a circular motion
- Mogdan
- · Replies 17 ·
Flute player initial frequency?
- Wimpalot
- · Replies 7 ·
RC Circuit defibrillator Question
- tmlfan_17
- · Replies 2 ·
The sensitivity of the galvanometer
- Asmaa Mohammad
- · Replies 3 ·
Can a 2MeV photon produce a proton-antiproton pair?
- 125.6
- · Replies 3 ·
Electric currents and Magnetic fields
- SDTK
- · Replies 2 ·
Laser Physics - Diameter of a Spot on the Moon from a Laser
- ChrisJ
- · Replies 6 ·
Solving a Friction-Constrained Motion Problem
- Buffu
- · Replies 7 ·
Spinning block with decreasing radius
- Buffu
- · Replies 11 ·
Max values of current and charge using differential equations
- Arman777
- · Replies 13 ·
Minimum Kinetic energy of the hydrogen atom
- Rahulrj
- · Replies 22 ·
Field strength to deflect electron in a cathode-ray tube
- David23454
- · Replies 16 ·
How Long for a Block in SHM to Hit a Wall After Spring Snaps?
- Physicist1234
- · Replies 6 ·
When does a pebble placed on a rolling wheel start to slide?
- Buffu
- · Replies 5 ·
Sound Waves in Different Mediums
- Joseph Phan
- · Replies 3 ·
Why Does Changing Force Direction Affect Acceleration Calculations on a Wedge?
- Buffu
- · Replies 11 ·
Object splitting at half height: momentum conservation with negative velocity
- Deadawake
- · Replies 5 ·
Estimating Electromagnetic Radiation from a Cellular Phone
- JordanD
- · Replies 1 ·
Phase difference and Standing waves vs Progressive waves
- Lamar Ngolo
- · Replies 5 ·
Train whistle Doppler effect with approach and recession frequencies
- chem31sa6
- · Replies 6 ·
What is the estimated path length traveled by a deuteron in a cyclotron?
- gmark
- · Replies 4 ·
The voltage across an AC source and a resistance in series
- Asmaa Mohammad
- · Replies 4 ·
Why Is It Sin Theta Instead of Cos Theta in Magnetic Flux Calculation?
- watthappening
- · Replies 8 ·
Calculating the Wavelength of Monochromatic Radiation in Compton Scattering
- Pouyan
- · Replies 1 ·
Question regarding a magnetic field path around a gapped core
- doktorwho
- · Replies 8 ·
Two blocks on string with 30-60-90 triangle at constant speed
- SqueeSpleen
- · Replies 3 ·
Points on an elliptical orbit where V(radia) is zero.
- Ali Baig
- · Replies 2 ·
Pressure drops in hydraulic dampers
- Tommtb
- · Replies 5 ·
Relation between Levi-civita and Kronecker- delta symbol
- Pushoam
- · Replies 2 ·
Thermal Expansion: Volume vs. Linear - 0.11L Spilled
- Alex126
- · Replies 2 ·
Magnitude of Force Exerted on Middle Block in a Three-Block System
- ConfusedMonkey
- · Replies 14 ·
Finding distance traveled by rebound when measured for surface
- Ithilrandir
- · Replies 13 ·
Pair Production Velocity Calculation
- ikihi
- · Replies 5 ·
Findings need confirmation about change of weight
- Crowxe
- · Replies 30 ·
Resistance of rice cooker's heating element?
- Dinie
- · Replies 10 ·
Time for water to equalize between two cylinders with connecting hole
- Tellerath
- · Replies 1 ·
Variation of EM radiation with frequency
- Pushoam
- · Replies 2 ·
Effect of 2% radius decrease on Earth's surface gravity and rotational kinetic energy
- baldbrain
- · Replies 15 ·
Generalized Galilean transformation
- Pushoam
- · Replies 4 ·
Minimum mirror height for a person to see full reflection
- Const@ntine
- · Replies 26 ·
Two students on sled passing 2 kg object on frictionless ice
- Yoonique
- · Replies 14 ·
What are the Best Demonstration Ideas for Archimedes' Principle?
- Necm
- · Replies 1 ·
Acceleration associated with the Earth’s spin
- Pushoam
- · Replies 8 ·
Calculating total resistance of a combination circuit
- Ketchup4684
- · Replies 19 ·
Circuit Problem -- Combining 4 resistors to make 95 Ohms
- a1234
- · Replies 10 ·
A hydrogen atom transitions from n= 5 state to the ground state
- ikihi
- · Replies 3 ·
Interesting physics topic for a presentation
- Bunny-chan
- · Replies 5 ·
How Does a Diffraction Grating Resolve Different Wavelengths of Sodium Light?
- Eagertolearnphysics
- · Replies 10 ·
Understanding Pressure Drop and Damping Force Calculation in Shock Absorbers
- Tommtb
- · Replies 3 ·
Archived Derive the general solution for current in a lossless transmission line
- biker.josh07
- · Replies 2 ·
What is the work function of the photoelectric material?
- ikihi
- · Replies 3 ·
Raft buoyancy with man and elephant loading
- TheStudent77888
- · Replies 3 ·
How to distribute the charge between two spheres to minimize the potential?
- Buffu
- · Replies 24 ·
What is the energy of the alpha particle and recoiling nucleus?
- says
- · Replies 9 ·
Intensity after Laser Round Trip
- cake-jake1
- · Replies 2 ·
Direction of normal force exerted on object B
- Faiq
- · Replies 8 ·
Freewheeling bicycle and friction
- Worthatry
- · Replies 6 ·
How high can a high jumper clear on the moon compared to on Earth?
- Jimmy87
- · Replies 4 ·
Equivalent capacitance of a system of 2 spheres
- randomgamernerd
- · Replies 3 ·
Which light turned on first and how much later did the second one turn on?
- ChrisJ
- · Replies 1 ·
Thin film constructive interference
- ikihi
- · Replies 3 ·