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 is the equality of first and second focal lengths in Sears' Optics?
- ttzhou
- · Replies 4 ·
Find the current induced by a magnetic field, and the power
- Parad0x88
- · Replies 1 ·
What is the magnitude of the angular momentum of the bar?
- Toranc3
- · Replies 4 ·
Adding Up Resistors: Order of Operations Explained
- prettykitty
- · Replies 4 ·
Pushing a box across a horizontal floor
- Benny851
- · Replies 6 ·
Nonlinear second order ODE describing a force field
- thetasaurus
- · Replies 1 ·
Calculating Alpha in BJT Common Emitter Circuit
- zee824
- · Replies 2 ·
In a series circuit with 3 bulbs, does the voltage decrease?
- DeltaOne
- · Replies 1 ·
Speed relativity, Einsteins theorie
- slrn
- · Replies 1 ·
Question regarding the elevator acceleration resultant force
- 950315
- · Replies 3 ·
Double torque problems. Not sure if I'm on the right track.
- NasuSama
- · Replies 7 ·
Magnetic field caused by a current-carrying wire
- Ipos Manger
- · Replies 6 ·
Why Does My Calculated Answer Differ from the Marked One on a Physics Test?
- RuthlessTB
- · Replies 8 ·
How Do You Solve an Elastic Collision of Particles Using Conservation Laws?
- jaeeeger
- · Replies 3 ·
Magnetic field between 2 parallel wires
- dawn_pingpong
- · Replies 4 ·
How do you solve compound body problems with three masses and one pulley?
- Stradivarius
- · Replies 1 ·
Change in Magnitude of Acceleration
- wpan
- · Replies 2 ·
How Does an Electric Field Affect Electron Energy in a Battery?
- Peter G.
- · Replies 4 ·
Vector Addition: A (41.0 m, 20.0°) + B (70.0 m, 44.0°) = C?
- xobianca62ox
- · Replies 2 ·
Mass submerged in oil and scales problem
- bdh2991
- · Replies 1 ·
How much current is needed in an inductor to heat up water?
- utd223
- · Replies 2 ·
Physics ramp/acceleration problem
- scorks
- · Replies 4 ·
Magnetic field of an infinite current sheet : Amperes law
- Nyasha
- · Replies 2 ·
Elastic Glancing Collision: Final Speeds and Scattering Angle
- kkuhnert
- · Replies 1 ·
Bouyant force with water and in equilibrium
- bdh2991
- · Replies 2 ·
Speed of water flowing through pipe
- thatshowifeel
- · Replies 5 ·
Electrostatic Printer and two plate capacitors deflecting charged ink droplets
- Dester
- · Replies 3 ·
How Does a Sudden Stop of a Gas-Filled Cylinder Affect Temperature?
- jaumzaum
- · Replies 5 ·
Why is the net torque not exactly zero.
- snagglepuffin
- · Replies 3 ·
How to prove Fardays' law of electromagnetic induction
- Dranzer
- · Replies 2 ·
Natural frequency of oscillating electron
- JBBOLAND
- · Replies 1 ·
Magnitude of frictional force during terminal velocity
- Ace.
- · Replies 7 ·
Cannon ejecting bullets moving on surface with friction
- Tanya Sharma
- · Replies 6 ·
Total mechanical energy of orbiting satellite
- aloman
- · Replies 4 ·
Carnot Efficiency of a heat engine
- AlaskanPow
- · Replies 11 ·
Find Center of Mass for an open box Confused about steps for this problem
- Lo.Lee.Ta.
- · Replies 7 ·
Inclined plane force components and the acceleration problem
- goktr001
- · Replies 5 ·
How does an object orbit something
- ASidd
- · Replies 2 ·
How Do You Calculate Current in Basic Circuit Problems?
- letsfailsafe
- · Replies 7 ·
Confused about the answer given by vcaa on electric power
- torud
- · Replies 9 ·
Kinetic Energy of Electron Beam.
- Minki
- · Replies 2 ·
What are the equations for solving the collision problem in momentum?
- Violagirl
- · Replies 2 ·
Projectile Motion in One Dimension
- razrsharp67
- · Replies 4 ·
Help With Simple Single Slit Diffraction Pattern?
- bmb2009
- · Replies 1 ·
Calculating Impulse and Force in a Head-On Collision
- pinksparkles2
- · Replies 1 ·
Learning physics on my own need a little help
- oG riT
- · Replies 4 ·
Calculating number of harmonics problem
- AlaskanPow
- · Replies 5 ·
Solving for Initial Velocity in a Long Jump
- Fifty
- · Replies 6 ·
Finding speed of roller coaster at different points
- joe426
- · Replies 3 ·
Tensile stress given theta and force
- plz
- · Replies 3 ·
How Does Frequency Affect Impedance in a Parallel RLC Circuit?
- NullSpace0
- · Replies 3 ·
Solve Torque Problem: Wheel (M & R) Slowing from 76.6 to 31 RPM in 4.62s
- NasuSama
- · Replies 1 ·
How Do Planets Orbit Stars in Elliptical Paths?
- lmstaples
- · Replies 2 ·
Find the final internal energy of a gas.
- thatguythere
- · Replies 1 ·
Hydroelectric generation and energy question?
- bohobelle
- · Replies 1 ·
Calculating Tension in a Pendulum: Problem-Solving Tips and Tricks
- vysero
- · Replies 2 ·
Electrostatic equilibrium (Sphere with cavity)
- Fabio010
- · Replies 3 ·
What Is the Maximum Elastic Energy Stored in a Climbing Rope During a Fall?
- peripatein
- · Replies 9 ·
Runner's Distance from Starting Point after 11.5 Seconds
- mrlevis
- · Replies 2 ·
Electric Field from Charge Distribution: Analyzing V(x,y,z)
- Zarrey
- · Replies 20 ·
Ring of Charge, Electric Potential
- fornax
- · Replies 1 ·
Can a Motorbike Stop in Time to Avoid a Crash?
- FaraDazed
- · Replies 4 ·
Understanding the Relationship between Kinetic and Potential Energy in Freefall
- bohobelle
- · Replies 1 ·
Fluid Statics (multiple choice question)
- Ariel P
- · Replies 4 ·
What Is the Velocity of the 1.07kg Block After the Collision?
- lemin_rew
- · Replies 11 ·
Geosychoronous Satellites and their KE/Orbitals
- AryRezvani
- · Replies 2 ·
Diffraction - central spot covers moon
- Ducks_in_OR
- · Replies 2 ·
Intensity by cylindrical light source
- Saitama
- · Replies 12 ·
Solving Coulomb Barrier Penetrability with a Confusing Formula
- daleklama
- · Replies 1 ·
Calculating the charge of an electron from Millikan's Oil drop experiment
- karan4496
- · Replies 2 ·
What is the Velocity of the Last Angstrom in the Falling Chain Problem?
- wowowo2006
- · Replies 20 ·
Predicting the distance where torque should be applied?
- JazzyJones
- · Replies 3 ·
Half Lives and Radioactive Decay
- CharlieW95
- · Replies 11 ·
Radioactive Decay: Calculating Plutonium Amount & Age of Meteor
- CharlieW95
- · Replies 1 ·
Distribution of force at different angles
- memoguy
- · Replies 5 ·
Moment of Inertia: A Fundamental Property of Rotating Objects
- benoconnell22
- · Replies 4 ·
Finding angular speed given T and I
- lespiderboris
- · Replies 3 ·
Two blocks of mass on a ramp with a frictionless surface?
- wahllyd
- · Replies 1 ·
Finding the current in a resistor
- Workout
- · Replies 4 ·
Universal Gravity Circular Orbit
- The_Scorpion
- · Replies 1 ·
Calculate capacitances of 2 unknown
- bsbs
- · Replies 9 ·
Conservation of Energy and Electric Potential
- fornax
- · Replies 7 ·
What is the derivative of the moment of inertia?
- benoconnell22
- · Replies 1 ·
Volume flow rate through air ducts
- thatshowifeel
- · Replies 1 ·
Thermodynamics question(change of internal energy)
- Devald
- · Replies 1 ·
How Do You Calculate Average Angular Acceleration?
- vysero
- · Replies 7 ·
Finding Applied Force at equilibrium
- pxw
- · Replies 6 ·
Finding Time for Boat to Slow Down with Velocity Dependent Forces
- cbasst
- · Replies 2 ·
Derivation of Acceleration from Velocity with Partial derivatives
- fluidmech
- · Replies 4 ·
Webpage title: Estimating the Diameter of the Moon Using a Total Solar Eclipse
- Ragnarok7
- · Replies 10 ·
Finding the efficiency of an engine given energy input, energy wasted.
- Dez1
- · Replies 2 ·
Analyzing the Trajectory and Acceleration of a Rocket Launch.
- peripatein
- · Replies 11 ·
Photon momentum and energy question
- metalrose
- · Replies 3 ·
A projectile exploding at the top of its trajectory
- anban
- · Replies 1 ·
Simple harmonic motion-experiment
- Smileyxx
- · Replies 1 ·
Electromagnetism theory questions
- skg94
- · Replies 2 ·
Calculating Work, Kinetic Energy, and Speed for a Stalled Car
- KnockKnock
- · Replies 6 ·
Different times Reference Frame Question
- bethany555
- · Replies 1 ·
Acceleration vector exercise (coordinate system)
- sdadksajd
- · Replies 5 ·