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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Thermodynamics: Air and Steam Mixtures
- nightingale
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Two stacked blocks attached to a spring
- mintsnapple
- · Replies 3 ·
Displacement of a wave: Understanding Negative Results
- BOAS
- · Replies 2 ·
Infinite Line of Charge and Electric Potential Difference
- tomlichu
- · Replies 7 ·
An object which experiences two gravitational force
- adjacent
- · Replies 6 ·
Wind turbine rotor acceleration, torque, and kinetic energy at 0.25 rev/s
- asaspades
- · Replies 13 ·
What Factors Increase the Acceleration on a Spinning Wheel?
- bennyq
- · Replies 5 ·
Why are objects different colors—reflection, absorption, or transmission?
- 582153236
- · Replies 1 ·
Finding the tension in a circular pendulum without radius or angle.
- Parallax
- · Replies 9 ·
Finding the mass of a block after colliding with a spring
- chococho
- · Replies 5 ·
Induced Emf in an Inductor in an LRC circuit
- asb5468
- · Replies 5 ·
Coefficient of kinetic friction for 100 N force at 37° below horizontal
- chococho
- · Replies 9 ·
Angular Momentum Contradiction Due To Choice Of Origin
- TadeusPrastowo
- · Replies 11 ·
Maximum allowable length for a column under a load (buckling question)
- theBEAST
- · Replies 3 ·
Steady State Circuit Analysis with Phasors
- alexmath
- · Replies 5 ·
Momentum - Bumping 2 carts with magnets
- Dethrone
- · Replies 1 ·
Solving Circuits: Fig. 27-65 Analysis
- KTiaam
- · Replies 1 ·
What Value Must n Be for a Glancing Elastic Collision to Occur?
- Fizics14
- · Replies 26 ·
Unit Conversion W➝J: Break-Even in 50 Years?
- JJ91
- · Replies 5 ·
Form of the displacement, y(x,t), for the normal modes of a string
- RyanTG
- · Replies 4 ·
Calculate the distance traveled by 2 vehicles(reaching the same point)
- iloveyourspam
- · Replies 5 ·
Op-amp summing amplifier with V3 term coefficient
- · Replies 1 ·
Amplitude and energy when a ring drops onto a torsional pendulum
- physiks
- · Replies 7 ·
What is the best way to estimate uncertainties in a lab experiment?
- yolo123
- · Replies 1 ·
Elastic collision, one object in circular motion
- azukibean
- · Replies 4 ·
Simple Harmonic Motion Displacement
- Qube
- · Replies 1 ·
Capacitor Voltage Homework: Vo(0), v(infinity), & R
- princejan7
- · Replies 4 ·
Work and heat for refrigerant-134a in a frictionless piston-cylinder device
- Mattheo
- · Replies 10 ·
Reaction forces due to imbalance of a shaft
- zeralda21
- · Replies 2 ·
Hydrostatics - Benzene poured into uniform U shaped tube with water
- ichivictus
- · Replies 8 ·
What Is the Wavelength of the Second Overtone in a 2m Rope?
- rwsunny85
- · Replies 5 ·
How Do You Calculate Total Resistance, Current, and Power in a Complex Circuit?
- samsmith234
- · Replies 4 ·
Simple Harmonic Motion: Calculate Max Velocity
- greenglasses
- · Replies 1 ·
Kleppner and Kolenkow 5.10 - Falling Chain
- Radarithm
- · Replies 21 ·
Composition of 2 simple harmonic motions with different angular veloci
- TheDoctor46
- · Replies 9 ·
Galilean transformation problem (Speed)
- Ace.
- · Replies 3 ·
Spectral lines and energy levels
- Pika007
- · Replies 2 ·
Basic kinematics - fox jumping over a wall problem
- chococho
- · Replies 5 ·
Simple harmonic motion derivative of position function
- jdawg
- · Replies 3 ·
Thermal Expansion of a circular steel plate
- Aoiumi
- · Replies 8 ·
Why does a box topple when pushed at the top but slide when pushed lower?
- adjacent
- · Replies 17 ·
Wavelength with just enough energy
- STEMucator
- · Replies 8 ·
Space probe between the earth and moon
- toothpaste666
- · Replies 2 ·
Calculating work not given acceleration, work done by gravity
- KinjaMSTR
- · Replies 1 ·
Solution to Classical Mechanics Problem: Removing Constant Terms
- rmfw
- · Replies 1 ·
What is the solution for object distance in a diverging lens?
- ghostops
- · Replies 7 ·
How can I eliminate Tw in the equation for heat loss from a house?
- Donna14
- · Replies 10 ·
Calculating work done on nonlinear spring
- kivarocket
- · Replies 5 ·
Objects in equilibrium beam problem
- BrainMan
- · Replies 16 ·
Capacitor problem - Calculate the heat in connecting wires
- LHC_23
- · Replies 4 ·
Acceleration & velocity using instantaneous centre of zero velocity
- Ctom101
- · Replies 4 ·
Ideal gas lifting a 10 kg mass while absorbing heat
- kivarocket
- · Replies 6 ·
Solving Kirchhoff's Rules: Find Currents in a Circuit w/2 Batteries
- BOAS
- · Replies 5 ·
How can I calculate the power delivered using geothermal energy and an aquifer?
- Donna14
- · Replies 1 ·
Concept question, linear momentum and mechanical energy
- tentoes
- · Replies 3 ·
Introductory Quantum HW (Angular Momentum)
- stefan10
- · Replies 3 ·
Change in Entropy of an expanding gas
- Chase11
- · Replies 2 ·
Two questions on retrieving thermodynamic properties
- princejan7
- · Replies 5 ·
Angular frequency of electron in an electric field
- amind
- · Replies 8 ·
Find charge q of particle passing through charged plates
- SchrodingersMu
- · Replies 5 ·
Maximum average power for a purely resistive load
- zealeth
- · Replies 6 ·
Superposition of two waves with different frequencies
- SinSinger
- · Replies 2 ·
Length of Pendulum with Variables Only
- efitzgerald21
- · Replies 1 ·
What is the Lagrangian of a Sliding Ladder?
- physiks
- · Replies 8 ·
One horse starts moving or slips
- mcastillo356
- · Replies 23 ·
Calculating the Isotope Ratio of Uranium 235 and 238 4.5 Billion Years Ago
- skrat
- · Replies 4 ·
Is Gauss' Law Summation Necessary for Uniform Electric Fields?
- BOAS
- · Replies 1 ·
Why do distant objects appear to move more slowly?
- adjacent
- · Replies 10 ·
Mechanics - Work-Energy Principle Question
- AntSC
- · Replies 13 ·
Vibrating molecule of IBr - energies
- skrat
- · Replies 2 ·
Does Less Friction Always Mean a Shorter Braking Distance?
- eddywalrus
- · Replies 1 ·
Mutual Inductance Between a Coil and a Solenoid
- asap9993
- · Replies 2 ·
Is Angular Momentum Conserved About Point O?
- princejan7
- · Replies 1 ·
How Does Light Absorption Affect the Oscillation Period of a Pendulum?
- Tanya Sharma
- · Replies 3 ·
Oscillation of disk and particle.
- Tanya Sharma
- · Replies 2 ·
I need someone good at astronomy
- that_randomguy
- · Replies 8 ·
Why does my impulse-momentum calculation give -0.822 m/s?
- mpittma1
- · Replies 8 ·
Question on Electromagnatic Induction
- mike2011
- · Replies 2 ·
What are the Units for the momentum of a Photon?
- blue_lilly
- · Replies 6 ·
Radiocarbon Dating: Determining Sample Age of 41000-Yrs
- blue_lilly
- · Replies 5 ·
Solving for Max Height and Angular Velocity of a Thin Rod
- albega
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Conservation of Momentum of a box of mass
- blue_lilly
- · Replies 4 ·
Umbra and penumbra radii at the moon's distance from Earth
- Calico snail
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How Does NaCl Molecule Transition Influence Photon Frequency?
- skrat
- · Replies 12 ·
Normalizing a wave function and finding probability density
- Emspak
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How Does Speed Affect Normal Force at the Crest of a Hill?
- Fresh Coffee
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Force on a 5 nC charge from two other charges
- pumpernickel
- · Replies 6 ·
Photoelectric Effect - Maximum Wavelength
- LotusTK
- · Replies 1 ·
How Do You Solve for Time in Projectile Motion Equations?
- Zashmar
- · Replies 20 ·
Find Distance of Car, given Rest-Energy
- blue_lilly
- · Replies 5 ·
Potential difference question - Immediate
- MathewsMD
- · Replies 6 ·
[Statistical Physics] Microstates in a large system/Boltzmann entropy
- Flucky
- · Replies 4 ·
Completely inelastic collision with object attached to spring
- jayjay5531
- · Replies 1 ·
Deriving the moment of inertia of a thin rod.
- Dethrone
- · Replies 11 ·
Why Do Distant Objects Appear Dimmer Due to the Inverse Square Law?
- adjacent
- · Replies 4 ·
Mechanical energy of a spring system
- Schulze
- · Replies 1 ·
Find the force on a conveyor belt
- PhysicoRaj
- · Replies 8 ·
Determining the object distance from a magnifying glass
- chuggZ
- · Replies 2 ·
Resonance in a Mechanical System
- amk1995
- · Replies 3 ·
Electric field at a point due to an infinite line charge
- Chetlin
- · Replies 6 ·