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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Mixing two ideal gases with different V, T at constant pressure
- chocopanda
- · Replies 16 ·
Normal modes of four coupled oscillating masses (Kleppner and Kolenkow)
- dford
- · Replies 4 ·
Experiment about diode related to temperature and potential difference
- songoku
- · Replies 11 ·
Shouldn't this be kinetic friction instead of static friction!?
- Mohmmad Maaitah
- · Replies 13 ·
Combination of 2 formulas for a graph
- leejohnson222
- · Replies 31 ·
Gravitational equipotential multiple choice problem
- Grizzly_1
- · Replies 4 ·
Two masses, two pulleys and an inclined plane
- Valerion
- · Replies 68 ·
Basic Stress and Strain question -- Rock on top of a vertical column
- Hamiltonian
- · Replies 19 ·
Horizontal force on a horizontal bar
- marjine
- · Replies 2 ·
Maximum range and time in air for an airplane with fuel energy constraint
- Argonaut
- · Replies 4 ·
How Does Mass Cancellation Affect Acceleration on an Inclined Plane?
- Mohmmad Maaitah
- · Replies 8 ·
Why is the Highlighted Statement True?
- member 731016
- · Replies 15 ·
Using first principles, how to get the equation of motion?
- Nicci
- · Replies 8 ·
Velocity of efflux out of a water tank
- AbhinavJ
- · Replies 19 ·
Final Angular Momentum of a Space Station
- marjine
- · Replies 10 ·
Finding capacitor charge when current splits across resistors
- ananonanunes
- · Replies 4 ·
Rearranging formula using logarithms
- Mr_Mole
- · Replies 11 ·
Work-Energy Theorem and Friction
- Argonaut
- · Replies 9 ·
Calculating flow rate when emptying liquid from a closed-top tank
- labuch
- · Replies 11 ·
Faraday's law and Magnetic Fields
- maksym_slnc
- · Replies 3 ·
Finding static friction and angular velocity for a coin on a rotating disk
- AzimD
- · Replies 19 ·
Applications of gyroscope in daily life
- Kumail Haider
- · Replies 19 ·
Equipotential surfaces for an electric dipole
- vcsharp2003
- · Replies 25 ·
Finding Absolute Uncertainty in Data
- member 731016
- · Replies 8 ·
Finding efficiency of an engine (with attempt)
- RandiSS
- · Replies 5 ·
Series-Parallel Circuits (R/2R Ladder Networks)
- Lay1
- · Replies 7 ·
Why is transmitted light E cos θ not E/cos θ in Malus' law derivation?
- member 731016
- · Replies 5 ·
Why does heat input increase volume if temperature stays constant in a gas cylinder?
- Shovon00000
- · Replies 1 ·
Finding the normal force on a bead stationary on a rotating hoop
- AzimD
- · Replies 39 ·
External forces required to move an electric dipole quasi-statically
- vcsharp2003
- · Replies 14 ·
Calculating Train Deceleration: Kid's Free Fall Time
- ejacques
- · Replies 5 ·
Einstein relativity between 2 coordinates systems
- Atabold
- · Replies 3 ·
Calculating electric charge from graph (capacitor)
- krisu334
- · Replies 3 ·
Tipping Point of Stationary Barbell
- vedant_krish
- · Replies 2 ·
Calculating Change in Energy: A Graph Analysis
- RandiSS
- · Replies 3 ·
Determine the moment of the force about point O
- sHatDowN
- · Replies 7 ·
Understanding Voltage Drop in a Circuit
- Lay1
- · Replies 10 ·
Why is work done by tension greater on snow than on ice?
- songoku
- · Replies 29 ·
Finding max velocity for a kart on a circular, banked track
- PhysicsNoob2
- · Replies 2 ·
What is the pressure difference?
- Tomy World
- · Replies 7 ·
Current in a circuit without external resistance
- MatinSAR
- · Replies 8 ·
Experimentally calculating the acceleration due to gravity
- acertainayush
- · Replies 13 ·
EMF and power in a rotating conductor
- milkism
- · Replies 18 ·
Determine the signs of ∆H, ∆G, ∆S for the reaction: N2(g) → 2N(g)
- aquastor
- · Replies 1 ·
Rod launched upward must return after one complete revolution
- Justforthisquestion1
- · Replies 13 ·
Voltage Variation w/ Variable Resistor: Correct?
- Lay1
- · Replies 4 ·
Newton’s laws of motion -- Does the 1st Law presuppose the 2nd Law?
- feesicksman
- · Replies 3 ·
How to find coefficient of friction of a body sliding down the slope?
- Callmelucky
- · Replies 7 ·
Deriving general specific heat capacity formula
- member 731016
- · Replies 8 ·
Closed path term in Thermodynamics
- member 731016
- · Replies 38 ·
A planet of mass M and an object of mass m
- Angela G
- · Replies 6 ·
Pulling a yoyo over a surface with tension
- Justforthisquestion1
- · Replies 36 ·
Magnetic field force between two perpendicular wires
- ssarpal
- · Replies 1 ·
Net Torque Within a Mass and Pulley System
- MichaelKD
- · Replies 22 ·
Why does the logic of negative acceleration not always indicate negative work?
- Altoid
- · Replies 7 ·
Can efficiency be calculated from temperature alone?
- yinnxz
- · Replies 5 ·
Is the Change in Internal Energy Just 4513 J When No Work Is Done?
- yinnxz
- · Replies 1 ·
What are the forces on a cell in a tree vs on the surface of a tree
- bo reddude
- · Replies 4 ·
Surface Tension and Pressure Balance in a Spherical Water Drop
- Pushoam
- · Replies 2 ·
Why is my Raman frequency for the fundamental band twice the expected value?
- tanaygupta2000
- · Replies 7 ·
Help with extended essay
- whiteshifted
- · Replies 8 ·
Finding acceleration with friction on a 20 kg object pulled at 30°
- Daniel Guh
- · Replies 20 ·
Does Newton's third law mean forces are always equal?
- thomas_shvekher
- · Replies 15 ·
Determining Radius from Magnetic Field of a Single-Wire Loop
- frankifur
- · Replies 4 ·
Finding focal length from beam width of concave mirror
- Morphus
- · Replies 22 ·
Newton's First Law to explain Washing Machine Spin Cycle
- thomas_shvekher
- · Replies 23 ·
The final velocity of a ball rolling while slipping.
- brochesspro
- · Replies 40 ·
Three Phase Per Unit System - Mark up, represent as single phase equiv
- Evari5te
- · Replies 0 ·
Solving the Basic Mechanics Bullet Block Collision Problem
- Arm
- · Replies 4 ·
Finding how much heat released by evaporation of water
- member 731016
- · Replies 4 ·
Griffiths 4.7: dipole energy in uniform electric field
- offscene
- · Replies 2 ·
How Do You Calculate m3 and m4 in Nuclear Reaction Equations?
- kokolo
- · Replies 4 ·
Why is there a maximum velocity for a rolling coin to stay upright?
- pandafish
- · Replies 14 ·
Rise of Liquid from Horizontal Acceleration
- Ben2
- · Replies 3 ·
Ratio of atomic masses of two ideal gases
- member 731016
- · Replies 7 ·
Proving Entropy statement is equivalent to Clausius statement
- member 731016
- · Replies 2 ·
Find the work from Newton's law of gravitation
- amazofntheab
- · Replies 15 ·
Quantum Theory, particle in a ring
- yesmale4
- · Replies 1 ·
How many kilocalories per gram are there in a 5.00-g peanut?
- member 731016
- · Replies 4 ·
Finding the apparent acceleration due to gravity versus latitude
- pandafish
- · Replies 8 ·
Kinetic energy transfer from a rotating body in an inelastic collision
- KataruZ98
- · Replies 23 ·
Heat exchanged in Expanding and cooling gas
- member 731016
- · Replies 6 ·
Significant figures -- wrong answer to Thermodynamics question?
- member 731016
- · Replies 4 ·
Finding heat exchanged work done to compress gas
- member 731016
- · Replies 6 ·
Special Relativity - Which reference frame experiences which time?
- AronYstad
- · Replies 36 ·
Time Travel: Calculating Velocity for 10 Year Trip
- jselms99
- · Replies 3 ·
Three equal forces applied to a rectangle, find net torque direction?
- paulimerci
- · Replies 30 ·
Understanding Work-Energy Theorem: Solving an Exercise with Different Solutions
- Argonaut
- · Replies 11 ·
Calculating moment of inertia for nonuniform sphere
- mbcrute
- · Replies 13 ·
Keeping a uniform bar in horizontal equilibrium
- ogodwin
- · Replies 8 ·
Conservation of relativistic energy, collision of particles
- milkism
- · Replies 15 ·
The Entropy Change of Melting Ice: Why is the Equation Written as ΔS = Q/T?
- member 731016
- · Replies 4 ·
Why is the final temperature 74 K in this gas compression problem?
- member 731016
- · Replies 8 ·
Calculating Spacetime Intervals for Simultaneous Events
- milkism
- · Replies 10 ·
Electric fields between point charges
- AliTheAlienTV
- · Replies 3 ·
Why do official solutions have more significant figures than my answers?
- Argonaut
- · Replies 6 ·
Poiseuille equation for water flow rate
- member 731016
- · Replies 16 ·
Uncertainties propagation for area of a rectangle
- member 731016
- · Replies 5 ·
Calculate these 5 temperatures along this Thermodynamic cycle
- Seeit
- · Replies 4 ·
Car with varying velocity on successive road segments
- MatinSAR
- · Replies 9 ·