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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What does magnitude and unit vectors mean?
- denfaro
- · Replies 14 ·
Value of frictional forces in a 3-block system
- Physics lover
- · Replies 14 ·
Why does a disk have lower rotational inertia than a hoop?
- John1767
- · Replies 19 ·
Calculating the force due to friction
- Zero
- · Replies 5 ·
The Role of Friction in Rotational Motion
- Rongeet Banerjee
- · Replies 11 ·
The fill factor of a solar cell
- patric44
- · Replies 1 ·
How can units of heat ever be ft^3/s?
- craveneye13
- · Replies 6 ·
A Spring pushing an object up a 25 cm slope
- Zero
- · Replies 6 ·
Amount of heat = 80 kJ -- how much ice can you melt?
- Yeahaight
- · Replies 15 ·
Calculating Young's Modulus from this Stress/Strain Graph
- Ben_Walker1978
- · Replies 29 ·
Moment of Inertia for a Triangle with Masses at the Vertices
- Rongeet Banerjee
- · Replies 10 ·
Understanding Kinetic Energy, Angular Momentum & Torque
- Riemannenthusiast
- · Replies 4 ·
Find the initial acceleration in a system
- RoloJosh16
- · Replies 17 ·
Why do two tipping methods for a 50kg box give different results?
- jonnyjonny
- · Replies 12 ·
Virtual work in a pulley system
- new90
- · Replies 2 ·
Eddy current Losses due to different materials
- Physics lover
- · Replies 24 ·
Stumped by This Physics Problem? Find Out What's Wrong Here!
- RM86Z
- · Replies 7 ·
What units for the wave function of a string?
- Zouatine
- · Replies 1 ·
Accelerating electrons and positrons
- Jeff97
- · Replies 8 ·
Energy for an electron in an accelerator
- arella
- · Replies 5 ·
Which is the correct solution for Optical Image Overlap?
- csirvi
- · Replies 8 ·
How Does Charge and Elasticity Affect Hamiltonian Dynamics?
- pepediaz
- · Replies 8 ·
Material between capacitor plates - viewed as two capacitors in series
- Mircro
- · Replies 3 ·
Why does moment of inertia include all particles if only the rim experiences tension?
- archaic
- · Replies 15 ·
Is the Thermal/Mechanics Problem incoherent?
- jaumzaum
- · Replies 8 ·
(QM) Number of states with Energy less than E
- iakmngle
- · Replies 6 ·
Kinetic Energy: Trial 1 vs. Trial 2
- Amik
- · Replies 5 ·
Proving time constant formulas of a capacitor using Kirchoff's laws
- estudent1371
- · Replies 6 ·
Momentum problem -- Forces on a human cannonball in a circus
- meso
- · Replies 4 ·
Calculate work, frequency and Plank's constant
- Jeff97
- · Replies 26 ·
Ionization percentage in the Saha equation
- tanaygupta2000
- · Replies 6 ·
Resolving forces in three dimensions with displacement vector
- FailedPaper5712
- · Replies 3 ·
Missing factor of 2 in an equilibrium problem
- Eggue
- · Replies 1 ·
Finding true wind velocity from two relative wind observations
- gnits
- · Replies 8 ·
Number of k-cells for a 1D lattice in reciprocal space
- patric44
- · Replies 16 ·
Calculating Energy Ratios: Moving Mass to and from Earth's Core
- arella
- · Replies 2 ·
Find Tangents on Velocity-Time Graph: Discontinuities?
- aspodkfpo
- · Replies 2 ·
Problem involving Negative Temperature
- tanaygupta2000
- · Replies 39 ·
Why must the potential function U be single-valued for fluid equilibrium?
- Adesh
- · Replies 1 ·
How Does Weight Distribution Affect the Balance of a Ferris Wheel?
- Jeremy74
- · Replies 3 ·
Electric force and field problem with point charges
- balikci
- · Replies 6 ·
Circuit Analysis - Source Transformation
- jisbon
- · Replies 8 ·
Direction of a spring's force in more than one dimension
- Est120
- · Replies 6 ·
I did not understand this derivative -- help please
- cemtu
- · Replies 14 ·
Position, velocity and acceleration at t=2s for s(t)=At-Bt²+Ct³
- prehisto
- · Replies 9 ·
How Do You Calculate Particle Density in a Star Using Electron Energy?
- tanaygupta2000
- · Replies 1 ·
Electric field in the Spherical Cavity
- Physicslearner500039
- · Replies 7 ·
Friction force of 2 connected block on steel surface
- EnricoHendro
- · Replies 7 ·
Mechanics Question -- The direction of the pseudo force
- Suyogya
- · Replies 19 ·
Car turning and centripetal force
- aspodkfpo
- · Replies 18 ·
Why does my textbook say the KE acquired by an object is m to the power zero?
- Rongeet Banerjee
- · Replies 7 ·
Work, Energy and Power for a Particle moving in a Potential Field
- Rongeet Banerjee
- · Replies 5 ·
Physics roller coaster question
- meso
- · Replies 5 ·
Calculate the flow of steam to heat wort (in the brewing process)
- sci0x
- · Replies 13 ·
Two resistors connected to a battery
- jay_buckets
- · Replies 12 ·
Impossible thermodynamics Q :(((
- RoisinCleary
- · Replies 1 ·
Man on a railroad car rounding a curve
- LCSphysicist
- · Replies 5 ·
Earth's magnetic dipole current calculation
- vinamas
- · Replies 2 ·
Electrix flux through a hemisphere
- Physicslearner500039
- · Replies 3 ·
What is the correct measurement using Vernier Calipers?
- harsh22902
- · Replies 1 ·
Kinematics problem - changing coordinates
- StillAnotherDave
- · Replies 4 ·
Physics problems with Newton's law of gravitation
- albertus50
- · Replies 18 ·
Displacement as a discrete function of time
- Apashanka
- · Replies 14 ·
Circuit Analysis Question -- 2 sources and 4 resistors
- jisbon
- · Replies 8 ·
Tension in a String/Rope (tug-of-war)
- kartis
- · Replies 14 ·
Degeneracy pressure of a White Dwarf Star
- tanaygupta2000
- · Replies 5 ·
How Do Induced Charges Affect Conductors in Electrostatic Fields?
- RodolfoM
- · Replies 14 ·
Why is the answer 7.5 seconds for light traveling around Earth's circumference?
- billllib
- · Replies 4 ·
Physics momentum problem -- Collision between 2 blocks that stick together
- Inwoodspaki
- · Replies 2 ·
A body only rotates on an inclined plane if it has friction?
- LCSphysicist
- · Replies 4 ·
Finding the y-component of a velocity vector
- valentina
- · Replies 2 ·
Why Does Weight Depend on Location?
- chito1
- · Replies 6 ·
Calculate the center of mass of a non-uniform metal rod
- VitaminK
- · Replies 13 ·
Molar Specific heat of Blackbody radiation
- tanaygupta2000
- · Replies 15 ·
Solving series-parallel circuits
- LR5
- · Replies 1 ·
Mathematically Modeling a Rolling Body with Slipping
- SilverSoldier
- · Replies 5 ·
Confusion on the concept of point of rotation
- Gourab_chill
- · Replies 3 ·
Finding the potential across capacitors in capacitor-only circuits
- Gourab_chill
- · Replies 2 ·
How Do I Determine the Correct Direction of the Friction Force?
- LCSphysicist
- · Replies 4 ·
Electric Field's Force on a Suspended Plastic Ball
- EsinDerin
- · Replies 8 ·
Toppling an Object over a Table
- SilverSoldier
- · Replies 6 ·
What is the equation for the object's velocity after being pushed in spring?
- Zero
- · Replies 8 ·
Skateboarder accelerating up a 15° frictionless ramp
- meso
- · Replies 5 ·
Two thermodynamic processes on a P-V diagram with hyperbolic path
- Zouatine
- · Replies 18 ·
Finding the Error in Solving a Chin-up Force Problem
- Honoratus
- · Replies 5 ·
Twin paradox: does time dilation give 15 years for the spaceship journey?
- VitaminK
- · Replies 1 ·
Electric field inside a conducting sphere with charge redistribution
- Physicslearner500039
- · Replies 3 ·
Compass , current carrying coil
- aliserwan
- · Replies 8 ·
Final temperature when mixing hot water with a cooler solution
- Petronius
- · Replies 6 ·
What is the formula for finding work in two dimensions?
- Edel Crine
- · Replies 15 ·
Work done against gravity with non-linear gravity variation
- SiriusFire
- · Replies 10 ·
Help checking my kinematics problem answer
- HP-Physics
- · Replies 12 ·
Three-phase transmission line efficiency and current calculations
- aliserwan
- · Replies 9 ·
How do I calculate work in two-dimensions and find the final velocity and time?
- Edel Crine
- · Replies 8 ·
How to calculate the entropy for two sources
- MathError
- · Replies 5 ·
Thick square loop made of Al with the top half exposed to a B field
- dcarmichael
- · Replies 1 ·
Motion of an open garage door as it closes
- Andrew1234
- · Replies 4 ·
What is the maximum depth to which a P-wave ray can travel?
- peeballs
- · Replies 7 ·
Electric potential of a spherical conductor with a cavity
- Bilbo B
- · Replies 1 ·
Magnetic field affecting a circular loop
- Bilbo B
- · Replies 1 ·