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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Which Direction Minimizes the Area of a Moving Square Due to Length Contraction?
- Ester
- · Replies 6 ·
Induced current in a wire multiple choice question
- jubba
- · Replies 3 ·
Understanding Work and Energy to Solving Physics Questions
- al_201314
- · Replies 9 ·
Electric potential energy and displacement
- prolong199
- · Replies 3 ·
Special relativity and inertial frames of reference
- fatboy12341
- · Replies 4 ·
How Does Mercury's Density Affect Column Pressure in hPa?
- teng125
- · Replies 1 ·
Light refraction through water and glass, and concave mirror image position
- JassC
- · Replies 6 ·
Why Is the Center of Gravity Calculation Resulting in Negative Coordinates?
- webren
- · Replies 8 ·
What is the constant A in the lattice energy equation for LiF?
- Soilwork
- · Replies 1 ·
Calculating Force for a Box on an Inclined Ramp
- highc
- · Replies 3 ·
Acceleration of a block of ice - Dynamics
- richievuong
- · Replies 8 ·
Long jump at 30 degrees with 7.80m distance
- singlish
- · Replies 2 ·
Why is the electric field strength not zero at x \gg R?
- Saketh
- · Replies 5 ·
How Is the Tension Calculated in the Main Cable Supporting a Piano?
- skinard360
- · Replies 1 ·
Newtonian mechanics and capstan
- Kolahal Bhattacharya
- · Replies 3 ·
Why use 30 degrees in the ladder torque equation instead of 60 degrees
- webren
- · Replies 3 ·
Roller coaster speed at bottom of vertical circle with normal force 2mg
- chmilne
- · Replies 6 ·
Calculating Int. Forces: Why the Difference?
- asdf1
- · Replies 2 ·
Max acceleration for climbing a rope with limited tension
- asdf1
- · Replies 3 ·
Doppler effect ambulance problem
- mikejones2000
- · Replies 2 ·
Sources of musical sound problem
- mikejones2000
- · Replies 1 ·
How Does Electron Acceleration Affect Photon Frequency and EM Wave Spectrum?
- Sheyr
- · Replies 1 ·
Finding frequency of a spring with distributed mass connected to a wall
- NotMrX
- · Replies 2 ·
The Physics of Tension in a Phone Cord
- PhysicsHatesMe01
- · Replies 6 ·
What is the physical origin of vacuum impedance?
- Kolahal Bhattacharya
- · Replies 1 ·
Electric field due to || CONDUCTING plates
- eisbrecher
- · Replies 2 ·
Centripetal force, centrifugal force and circular motion misconceptions
- Delzac
- · Replies 19 ·
What does it mean for a battery to be shorted?
- app
- · Replies 5 ·
Angular acceleration and velocity of pivoting rod with attached mass
- ano327
- · Replies 2 ·
Pressure applied to a completely enclosed fluid
- KingTutATL
- · Replies 6 ·
How Does a Spring's Work Relate to Frictional Forces in Motion?
- gagga5
- · Replies 1 ·
Why Do Equivalent Formulas for Radial Acceleration Yield Different Results?
- webren
- · Replies 6 ·
Find value of resistance to get max power in circuit
- satishinamdar
- · Replies 7 ·
Is it easier to push a lawnmover or pull it?
- konichiwa2x
- · Replies 18 ·
A pulley and a wedge questions.
- MathematicalPhysicist
- · Replies 1 ·
Solving Dissipating Charge Physics Problem
- Saketh
- · Replies 3 ·
Calculate Electricity Flow with Two Conductors of Different Diameters
- satishinamdar
- · Replies 11 ·
Force F for Balanced Masses M2, M3 on Block M1
- Kolahal Bhattacharya
- · Replies 3 ·
TWO questions Distance to exp. 120dB AND Depth of Well
- FelicitaH
- · Replies 3 ·
Radiated power, what does this even mean?
- ness9660
- · Replies 9 ·
How Does the Doppler Effect Change the Sound Frequency of a Passing Airplane?
- PhysicsHatesMe01
- · Replies 2 ·
Why is my wave frequency wrong when the boat moves westward?
- FelicitaH
- · Replies 7 ·
Speed of sound/Dectecting insects
- FelicitaH
- · Replies 4 ·
What is the correct force exerted by the seat in a pulley and force problem?
- kristen151027
- · Replies 2 ·
Which step does a rolling ball hit first on a staircase
- asdf1
- · Replies 7 ·
(projectile motion) calculation problem
- asdf1
- · Replies 11 ·
Young's Double Slit vs. Diffraction grating
- User Name
- · Replies 1 ·
What Are the Key Physics Concepts in Top Gun's Flight Scenes?
- DownSetDana
- · Replies 3 ·
Deriving the electromagnetic force density from Maxwell equations
- gjfelix2006
- · Replies 4 ·
Solving sealed tank and valve equilibrium problem
- ksle82
- · Replies 6 ·
Is Momentum Conserved in a Perfectly Elastic Non-Central Collision?
- John O' Meara
- · Replies 2 ·
Index of refraction and electromagnetic radiation
- physicsgal
- · Replies 4 ·
Mass of spherical balls after adding charges
- Amith2006
- · Replies 2 ·
The Physics of Rolling Down a Ramp
- daniel_i_l
- · Replies 6 ·
Tennis Ball Collide With Train Prob.
- Delzac
- · Replies 3 ·
Can Understanding Natural Frequencies Lead to Lethal Resonance?
- Delzac
- · Replies 13 ·
How Does the Time Derivative of Electric Field Cross with Magnetic Field?
- gjfelix2006
- · Replies 4 ·
Distances between Atoms in a Gas Molecule
- dingsbunnyranch
- · Replies 3 ·
How Do I Solve These Complex Magnetic Fields Problems?
- Hollysmoke
- · Replies 1 ·
Equation of Kinematics for Constant Acceleration
- User Name
- · Replies 3 ·
Why Gases are Not Commercially Sold by Volume
- KingTutATL
- · Replies 4 ·
Apparent visual magnitude/brightness problem
- toph
- · Replies 1 ·
Can Initial Velocity and Angle Determine Impact in Projectile Motion?
- asdf1
- · Replies 10 ·
Air Balloon Ballast Q: Find Weight to Rise 105m in 15s
- KingTutATL
- · Replies 4 ·
Total work from two Carnot engines with cascaded reservoirs
- KingTutATL
- · Replies 2 ·
How Does Heat Expansion Affect Gas Temperature?
- KingTutATL
- · Replies 1 ·
Calculating Energy Dissipated in Copper Wire Loop Due to Magnetic Field Increase
- StudentofPhysics
- · Replies 1 ·
Identifying an element from Emission Spectrum
- ness9660
- · Replies 2 ·
Pressure exerted in an elevator
- KingTutATL
- · Replies 5 ·
How Do You Calculate Tension in Each Wire for a Hanging Painting?
- kristen151027
- · Replies 4 ·
Production of electric current
- uwmphysics
- · Replies 2 ·
Calculating Max Height in Relative Projectile Motion: Earth vs. Moving Elevator
- chem3
- · Replies 5 ·
Magnetic Field due to a current
- app
- · Replies 2 ·
Finding rocket height and range in projectile motion practical
- shichi_reifujin
- · Replies 5 ·
Solving Physics Problems: Dynamics Troubles
- F for Freedom
- · Replies 3 ·
Pauli's exclusion principle and fine structures
- jubba
- · Replies 5 ·
What Is the Problem with the Electron's Travel Distance in the Field?
- ksle82
- · Replies 8 ·
Angular velocity and acceleration of a wheel on a rotating turntable
- WyldFyr
- · Replies 2 ·
Relative motion: Understanding acceleration and velocity in an elevator
- asdf1
- · Replies 4 ·
Where to find Physics Olympiad answers and similar questions
- daniel_i_l
- · Replies 2 ·
The role of gravity in terms of work done by an angled force on an incline
- Cali
- · Replies 4 ·
Elastic relativistic collisions
- Amith2006
- · Replies 1 ·
Do paper cups pushed together by blowing move apart or stay together?
- alwysnforevr002
- · Replies 3 ·
De Broglie Waves: All Moving Particles
- Amith2006
- · Replies 4 ·
Electrostatics charged spheres problem
- Kolahal Bhattacharya
- · Replies 5 ·
Can You Solve This Relative Velocity Physics Problem?
- leo_thunderbird
- · Replies 3 ·
Elastic and Inelastic Collision explanation
- cks
- · Replies 1 ·
Elastic Collision why I am wrong?
- cks
- · Replies 1 ·
Circular motion, energy transfer, and power on slopes
- Meiersux
- · Replies 1 ·
Why is a brick pushed against a wall not accelerating?
- kristen151027
- · Replies 37 ·
Stokes' law and its application in a hydrometer test
- CJP
- · Replies 1 ·
Torque whatmakes a car accelerate
- cks
- · Replies 5 ·
Physics + Logic = tired brain :biggrin:
- kristen151027
- · Replies 4 ·
Elastic and inelastic collisions with two balls, and spring separation
- vincikai
- · Replies 3 ·
Are De-Broglie Waves Mechanical or Electromagnetic?
- Amith2006
- · Replies 2 ·
Special relativity from different angle
- exponent137
- · Replies 3 ·
Applications of Mass Spectrograph
- Amith2006
- · Replies 3 ·
Bus acceleration, constant velocity, and deceleration over 400m
- wells=mvp
- · Replies 3 ·