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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Why Is Current the Same in a Series Circuit?
- Ed Quanta
- · Replies 2 ·
Conserving Momentum in AB+C Reaction
- neelakash
- · Replies 4 ·
Is this tangential velocity or angular velocity?
- donjt81
- · Replies 7 ·
Which Bohr orbit does the electron occupy in this atom?
- map7s
- · Replies 1 ·
Understanding Isothermal Processes
- bjgawp
- · Replies 1 ·
Kinematics - Mother catching up on child
- batman
- · Replies 2 ·
Thermodynamic Changes in Phase Transitions
- kram
- · Replies 2 ·
Why Is Frequency Selection Critical in Sound Interference Experiments?
- crossfacer
- · Replies 1 ·
How Is Initial Vertical Velocity Calculated in Projectile Motion?
- WeakCarrier
- · Replies 1 ·
Struggling with Practice Test Questions on Electromagnetism?
- AznBoi
- · Replies 11 ·
Path Retraced: Find Condition for Elastic Collision
- prabhat rao
- · Replies 1 ·
How Do You Calculate Inductance Per Unit Length for Parallel Planar Conductors?
- brad sue
- · Replies 1 ·
Calculate Distance Between Maxima of 500 nm Wavelength Light
- Mitchtwitchita
- · Replies 1 ·
Solving Hammer Launch Problem: 32.8m
- danago
- · Replies 3 ·
What is the Tensile Stress, Strain, and Young's Modulus of a Stretched Wire?
- h8torade
- · Replies 3 ·
Solving a Basic Atwood Machine Setup Problem
- Jordanosaur
- · Replies 3 ·
Train whistle frequency difference in approaching and receding
- euphtone06
- · Replies 3 ·
What is the kinetic energy of the piece of mass
- a150daysflood
- · Replies 3 ·
What Determines the Velocity of a Dropped Weight on a Toy Car?
- Gib Z
- · Replies 4 ·
Is there really no mass in photons?
- rlinsurf
- · Replies 2 ·
Internal energy of the gas in a gasoline engine
- fletcher89
- · Replies 3 ·
When to use conservation of momentum vs energy for a mass placed on an oscillating spring?
- i.mehrzad
- · Replies 1 ·
Tossing a projectile over a wall beside a platform
- paperclip
- · Replies 4 ·
Magnetic Field, copper wire, and solenoid problem.
- Alpha Russ Omega
- · Replies 2 ·
Power required to keep a sphere at 3300K
- CurtisB
- · Replies 7 ·
How fast does gravity move and does it have momentum?
- stripes
- · Replies 4 ·
Does the Center of Mass Change with Interaction Type or Reference Frame?
- neelakash
- · Replies 1 ·
Binomial Theorem and Electric Field question
- doubleUTF
- · Replies 4 ·
Forces on a car skidding to a halt.
- RobertE
- · Replies 2 ·
How Much of a Bicycle's Kinetic Energy is in Its Wheels?
- jjf5122
- · Replies 1 ·
Astronaut velocity after throwing an oxygen tank in space
- Mike667
- · Replies 8 ·
Normal Force, Friction Force, Accel problem
- Etsang2005
- · Replies 2 ·
Radioactivity detectors, lightning survival and magnetic field strength
- f3nr15
- · Replies 1 ·
Final Temperatures of Gas in Rigid and Piston Containers Heated Equally
- Funktimus
- · Replies 2 ·
How Do You Calculate Logarithms with Base 2 and Perform Decibel Calculations?
- dervast
- · Replies 3 ·
Can We See Around Corners? How Sound Travels Differently
- aquabum619
- · Replies 7 ·
What angle separates red and blue light refracted through glass?
- samsungman
- · Replies 4 ·
Finding rotational inertia for a rolling body that reaches height h
- Weave
- · Replies 10 ·
How to shape material to maximize gravitational field at a point
- neelakash
- · Replies 7 ·
Calculating Electric Potential for an Earth-Cloud Capacitor
- Boozehound
- · Replies 1 ·
Find the Optimum Spot to Minimize Wave Action in Large Water Tank Experiment
- simplicity12
- · Replies 1 ·
Calculating illuminance from OLED to polysilicon-TFT sensor
- niikos
- · Replies 1 ·
Circular Motion of motorcyclist
- danago
- · Replies 2 ·
Find Specific Heat at Constant Pressure of Gas with Molar Mass M
- chaoseverlasting
- · Replies 3 ·
Solving Mechanics Problem: Cessna at Taupo Airport with Easterly Wind of 38 km/h
- aks_sky
- · Replies 3 ·
What Is a Vacuum and How Does It Relate to the Index of Refraction in Optics?
- AznBoi
- · Replies 2 ·
Calculating Electric Force: 0.15 N in +y Direction
- samsungman
- · Replies 1 ·
Centripetal Acceleration of object orbiting earth
- Fusilli_Jerry89
- · Replies 1 ·
Determine the velocity of a hardball after it has been thrown
- Murdoc88
- · Replies 8 ·
How Do You Calculate the Potential Difference in a Parallel Plate Capacitor?
- Boozehound
- · Replies 1 ·
Traveling to the moon with a lot of physics?
- oOJust_LauraOo
- · Replies 1 ·
Frictional force on object falling 1.65 m
- raman911
- · Replies 38 ·
Moving Loudspeakers on a Railroad Car
- e(ho0n3
- · Replies 10 ·
Time Assumption for Newton Meter Projectile Velocity
- Hypochondriac
- · Replies 5 ·
Electromagnetic fields and force
- dtesselstrom
- · Replies 2 ·
Derivations of SI Units in my High-School Physics formulas.
- f3nr15
- · Replies 2 ·
Terminal voltage and electromotive force
- expresstrain
- · Replies 4 ·
Electron's Path Through Solenoid's Magnetic Field
- mbrmbrg
- · Replies 2 ·
Can radiation pressure be used for propulsion?
- cells
- · Replies 4 ·
Molar Heat Capacity at Constant Pressure Understanding
- grscott_2000
- · Replies 1 ·
Energy transfer in electricity conduction
- loom91
- · Replies 8 ·
How Do You Calculate Theta in Simple Harmonic Motion with Rubber Bands?
- kingwinner
- · Replies 10 ·
Tension in pulley support string before and after release
- chaoseverlasting
- · Replies 7 ·
Max. velocity with given coefficient of static friction (μ_s)
- Hendrick
- · Replies 5 ·
Angle Between Charged Particles in Equilibrium
- chaoseverlasting
- · Replies 3 ·
What is the Relationship Between Linear and Rotational Speed for a Screw?
- shurioz
- · Replies 7 ·
What Happens During a Collision of Three Objects on a Smooth Floor?
- alchemphy
- · Replies 3 ·
Oh no, conceptual questions, I
- samsungman
- · Replies 4 ·
How to Calculate Beta Angle for Pulley B in a Frictional Belt and Pulley System?
- masterflex
- · Replies 3 ·
Sound wave interference from reflection off an obstacle
- e(ho0n3
- · Replies 2 ·
Does Ohm's Law Equate to the Resistivity Formula R = ρ(L/A)?
- Chromium
- · Replies 1 ·
Find Max Power from 60Hz 4000A Power Line w/ 200m Wire
- seang
- · Replies 1 ·
What is the longest wavelength for ionizing ground state hydrogen atom?
- Dart82
- · Replies 5 ·
Point source sound intensity at different distances and decibel levels
- El_Dustino
- · Replies 1 ·
Voltage in the Middle of an Electric Dipole
- kaotak
- · Replies 3 ·
What is a Ballistics Pendulum and How Can I Use it for My Physics Project?
- sinackular
- · Replies 1 ·
How Much Voltage Is Needed to Detect Current Through an Insulator Like Paper?
- DoubleHelix
- · Replies 1 ·
How Do You Calculate Apparent Depth and Light Angle in Water?
- RoseCrye
- · Replies 17 ·
What is the Magnetic Field Around a Thin Walled Circular Conductor?
- Brewer
- · Replies 4 ·
Amplitude of Sound Waves from Two Sources at a Point
- e(ho0n3
- · Replies 6 ·
Why is the potential for an infinite wire proportional to log r?
- chaoseverlasting
- · Replies 5 ·
Torque required to support 333g load on robot leg
- tombot
- · Replies 5 ·
How Do String Tension and Mass Affect Oscillation Frequency?
- avfcavfc
- · Replies 3 ·
Centripetal force experiment with rotating and hanging masses
- ellese
- · Replies 4 ·
What is the formula for calculating the speed of light in a medium?
- RoseCrye
- · Replies 3 ·
Binding energy of a nucleon virus an electron
- ND3G
- · Replies 4 ·
How did Archimedes solve the crown problem?
- W24JBLV
- · Replies 3 ·
Will the Water Level Decrease When Ice Cubes Melt?
- tronter
- · Replies 1 ·
Motion of a Sphere: No Friction vs With Friction
- chaoseverlasting
- · Replies 3 ·
Calculating RMS Current from I(t)=3+4sinwt
- chaoseverlasting
- · Replies 2 ·
Determining speed experimentally
- TOD
- · Replies 17 ·
Calculating Tension in a Hanging Rope: To Add or Not to Add?
- Fusilli_Jerry89
- · Replies 3 ·
Car Braking Distance at Different Initial Speeds
- Mike667
- · Replies 16 ·
Mass per Unit Length of Violin Strings
- e(ho0n3
- · Replies 1 ·
Calculating Velocity Change of a 300g Ball with Impulse
- StellarZ
- · Replies 13 ·
Using physics in accident investigation
- physicsbum
- · Replies 14 ·
If friction cancels force why is work done when kinetic energy doesn't change
- Fusilli_Jerry89
- · Replies 1 ·
Quick force on the fulcrum of a lever?
- linuxux
- · Replies 6 ·
What are the frequency and maximum velocity of a wheel rolling without slipping?
- stinlin
- · Replies 2 ·
3-dimensional parametric equations
- JolleJ
- · Replies 8 ·