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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Efficiency of a heat engine at high temps
- notsam
- · Replies 4 ·
Power of Sun: Calculating Total Radiated Power
- notsam
- · Replies 1 ·
Troubleshooting a Coil Gun Project Using a Disposable Camera Circuit
- Link Floyd
- · Replies 2 ·
Gravitational Force and initial velocity
- FLms
- · Replies 4 ·
Calculating Change in Entropy: 1100 kg Cars Colliding at 75km/hr
- notsam
- · Replies 4 ·
Specific Heat Capacity Experiment
- Peter G.
- · Replies 6 ·
Building a Laser - Brewster's Angle Problem
- VitaX
- · Replies 1 ·
Calculating Projectile Motion and Forces in Men's Hammer Throw Event
- bigsaucy
- · Replies 3 ·
Which Ramp Requires Less Work Taking Friction into Account?
- teggenspiller
- · Replies 2 ·
Calculating Final Volume of Ideal Gas with Isobaric and Adiabatic Expansion
- satanic
- · Replies 2 ·
How do I find the proper distance between two particles in relativity?
- dead1327
- · Replies 4 ·
How do I calculate angles in a moving reference frame using relativity?
- dead1327
- · Replies 2 ·
Projectile motion (hammer throw)
- bigsaucy
- · Replies 8 ·
How Do You Solve the Ice Cube and Spring Problem on a Slope?
- eliassiguenza
- · Replies 2 ·
Thermal Physics: Water vs. Wood at 50°C
- Peter G.
- · Replies 1 ·
What is the charge on the second sphere?
- Charanjit
- · Replies 4 ·
Wave harmonics (calculate speed of wave)
- Pseudopro
- · Replies 1 ·
Rigid Rod Motion: Analysis of v, a, and Initial Velocity Cases
- zorro
- · Replies 1 ·
How Does Charge Redistribution Work Between Two Tetrahedron Conductors?
- clope023
- · Replies 1 ·
Michelson's Interferometer Problem
- VitaX
- · Replies 2 ·
High school math (population & exponents)
- novawinters
- · Replies 1 ·
Angular Momentum Conservation with a Parakeet Landing on a Turntable
- pelmel92
- · Replies 5 ·
Calculating Speed of Sound in Helium Gas at 293k
- huykma
- · Replies 5 ·
Polarization and intensity with three polarizing sheets
- VitaX
- · Replies 5 ·
Simple Harmonic Motion and Static Friction. I am stumped.
- IWuvTeTwis
- · Replies 2 ·
Rms speed of Hydrogen atoms in space
- notsam
- · Replies 2 ·
How to Calculate Currents in a Simple Transformer?
- mogley76
- · Replies 4 ·
Electric Field at Point 36.0 cm from Rod Center
- Artifaxx
- · Replies 6 ·
Velocity & Acceleration of Elevator
- mimo6267
- · Replies 4 ·
Understanding Snell's Law with a Prism
- VitaX
- · Replies 1 ·
What are the forces involved in circular motion on a rotating pole?
- medstudent123
- · Replies 2 ·
Understanding the Energy Transfer in a Simple Pendulum System
- n3w ton
- · Replies 1 ·
Get Expert Derivations for Physical Equations - Tips & Recommendations
- mateomy
- · Replies 1 ·
Angular Momentum of Ball of Mass Question
- pradeepk
- · Replies 3 ·
Simple Harmonic Motion (Bullet fired into a block attached to spring)
- fluffymastr
- · Replies 1 ·
When does the electric field equal 0 in Gaussian surface-type questions?
- pcml100
- · Replies 2 ·
Ladder leaning on frictionless wall and frictionless floor
- WackStr
- · Replies 7 ·
Challing Spherical Capacitor Problem
- mopar969
- · Replies 82 ·
Rc circuit multiple choice don't understand why this is the correct answer
- madah12
- · Replies 7 ·
Basic Kinematics - Initial Velocity
- Femme_physics
- · Replies 8 ·
How Does Entropy Change and Work Done Relate in a Reversible Ideal Gas Cycle?
- tigers4
- · Replies 1 ·
Amy's Ball: Solving a Cliff-side Problem
- scottyourban
- · Replies 5 ·
Two satellites in orbit around Jupiter
- magusxion
- · Replies 2 ·
Visualizing EM Waves: Learn Basics in 9 Days
- ElijahRockers
- · Replies 1 ·
Calculating Power for a Winch Launching an Ultralight Glider
- iaberrant
- · Replies 1 ·
Find the Mass of Water that Freezes: Entropy Change Calculations
- loosely
- · Replies 3 ·
Resistance calculation in a cube
- cooltwins
- · Replies 3 ·
Velocity of a particle problem
- andycampbell1
- · Replies 4 ·
Solve R1 in Rt = R3 + [ ( 1/R1 + 1/R2 ) ^-1 ] for Parallel Circuits
- aks333
- · Replies 1 ·
Car traveling on horizontal road with force of static friction
- Color_of_Cyan
- · Replies 2 ·
What Is the Resistance Value in an RC Circuit with a 37V Drop After 2 Seconds?
- huykma
- · Replies 10 ·
Assignment question, two charges electric field
- aks333
- · Replies 1 ·
What is the spring constant of both of the new springs?
- joej24
- · Replies 9 ·
How Does Light Behave When It Strikes a Glass Plate?
- kevnm67
- · Replies 7 ·
How much energy can a solar panel collect in one hour?
- NeedsHelp1212
- · Replies 2 ·
Find Centroid of Shape: X & Y Dimensions from Point O
- physicx_1
- · Replies 4 ·
Another Harmonic Motion Problem
- elsternj
- · Replies 3 ·
When to Use Maxima or Minima Equations in Thin-Film Interference?
- VitaX
- · Replies 1 ·
2-body problem - how to get the angle theta?
- alyx_vance
- · Replies 6 ·
What Does Each Symbol in the Interference Pattern Equation Represent?
- 3nder
- · Replies 3 ·
How to graph magnetic field between two wires?
- zzizi
- · Replies 26 ·
How to Convert Volt/Ohms to Microamps
- tica86
- · Replies 1 ·
Physics Project Help: Comparing Energy Efficiency for Lever Arm Setups
- orange7crush
- · Replies 2 ·
Calculating Acceleration on Planet X Using Pendulum Period Measurements
- blackbyron
- · Replies 1 ·
Relation between cavity resonance and sound speed
- haleycomet2
- · Replies 2 ·
Solve Mass of Glider with Harmonic Motion Help
- elsternj
- · Replies 4 ·
When Do You Hear Minimum Sound Intensity While Walking Away from Speakers?
- Hank_Rearden
- · Replies 1 ·
What force would be this replaced charge experience?
- aeromat
- · Replies 1 ·
Solve for I1, I2, I3 in Circuit w/ Loop Rule
- Grifter
- · Replies 4 ·
Altitude of a Rocket Launched into Space
- tesla93
- · Replies 2 ·
How Much Does the Spring Compress When Stopping a 4000 kg Ore Car?
- teggenspiller
- · Replies 2 ·
Pedulum, and it's characteristics
- teggenspiller
- · Replies 1 ·
Force on a Rectangular Current Loop [Magnetism]
- FermiParadox
- · Replies 2 ·
What Is the Key Principle of the Michelson/Morley Experiment Apparatus?
- Shark 774
- · Replies 1 ·
Maximizing Efficiency in Tandem Carnot Engines
- mopar969
- · Replies 25 ·
Temperature and Pressure at Center of Stars
- SUDOnym
- · Replies 1 ·
Design and Build a Machine to Stop an Egg from Breaking
- 15inugirl15
- · Replies 1 ·
Isobaric Process: Finding Work Done by Ideal Gas
- tigers4
- · Replies 5 ·
Solving Physics Problems: Manipulate Equations or Plug in Values?
- Jimmy Snyder
- · Replies 6 ·
Specular Reflection for 3-D Particle Collision
- Disinterred
- · Replies 1 ·
Finding unknown currents in a circuit, mass of wire
- KMc19
- · Replies 11 ·
Calculating Frequency of Star's Radio Signals from Earth
- crosbykins
- · Replies 1 ·
Finding Equilibrium Charge in a Static System
- LIZard137
- · Replies 2 ·
Spring Pull Q1: Bob's End Moves 20cm
- cdbowman42
- · Replies 1 ·
Gravitational ep in a uniform field
- kelly242
- · Replies 1 ·
At What Temperature Do Copper and Iron Wires Have Equal Resistance?
- confused1
- · Replies 3 ·
Potentiometer to measure cell voltage
- dba
- · Replies 12 ·
How Does Binary Star Mass Affect Orbital Period Calculation?
- kari82
- · Replies 1 ·
Specific Gravity: Mass 30kg & SG 3.6 in Fluid SG 1.2: True?
- tsecalvink
- · Replies 3 ·
Projectile Motion: Determining Height of Wood Chips Ejected at 30 degrees
- Milkster18
- · Replies 8 ·
How Do You Calculate Sound Intensity from a Decibel Level?
- alkhan22
- · Replies 3 ·
Showing the working for angular momentum
- Rbraind
- · Replies 1 ·
How Can kWh Be Converted into Mass?
- samirnasri
- · Replies 1 ·
Are My Distances Accurate in Calculating Moments at Point T?
- Femme_physics
- · Replies 3 ·
Rigid Body - Linear (Center of Mass) motion/Rotational Motion
- shadowplay
- · Replies 6 ·
A block moving up a frictionless incline
- physicx_1
- · Replies 4 ·
Calculate Focal Length to Reduce Viewing Distance to 25cm
- v_pino
- · Replies 1 ·
Calculating SHM Parameters: Speed and Acceleration at Different Points
- KingBigness
- · Replies 2 ·
What is the period of vibration for a 2.20 kg object on a 320 N/m spring?
- kelly242
- · Replies 1 ·
What is the Elastic Potential Energy Stored in a Compressed Spring?
- kelly242
- · Replies 1 ·