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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Wedge interference - solving for 'separation of fringes' without lambda
- iffybom
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Efficient and Accurate Power Sources for Electromagnets: What Are My Options?
- Alieneater
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Finding the Angle of Tipping for a Semi-Cylinder on a Ramp
- PennyGirl
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Average velocity of dot with position r = [3.5 cm + (2.8 cm/s²)t²]i + (5.4 cm/s)t j
- coopvtcc
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Discharging a Capacitor: How Long Does it Take?
- Jimmy25
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Which point does a released horizontal stick rotate about before hitting ground?
- Biggidy
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How Does Changing Drag Coefficient Affect Terminal Velocity in Downhill Skiing?
- dprimedx
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Uniform Vertical Force of Electrons, Using Momentum Principle
- leejqs
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Net force on charge at center of square with alternating and separated charges
- matt72lsu
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What is the correct sign convention for the change in internal energy?
- taculator
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Finding q1 when two point charges total 64.0 µC and repel with 76.0 N at 0.270 m
- Michael126
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Electric field from two charges at point above horizontal axis
- dgl7
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What Is the Correct Equation for a Box on a Frictionless Incline?
- Elo21
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How Does a Neutron's Speed Change After Colliding with a Deuterium Nucleus?
- Magma828
- · Replies 4 ·
Relative momentum formula or not?
- leejqs
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Don't get this dynamics problem
- elpermic
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Elastic Recovery and Permanent Set
- waltonhcky05
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Taylor Series Expansion for the Relativistic Factor of Momentum
- leejqs
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Coefficient of friction of a moving car
- katem
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Accelaration/ traveling problem
- Teenytiny1991
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Impulse on booster unit from space vehicle explosion
- Senjai
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How Many Harmonics in a 4-Node Standing Wave?
- PearlyD
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How Do Bullet Impact and Spring Constants Determine Oscillation Characteristics?
- Biggidy
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Calculating Car Speed from Horn Frequency
- Moroni
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Electric Currents and Magnetic Feilds
- lampshader
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Why Are Dipole Forces Not Collinear in a Uniform Electric Field?
- Masafi
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Was the Car Speeding Based on Skid Mark Analysis?
- Elo21
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Initial Velocity of 1.52 m High Jump Record
- uzboi
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How High and Far Does a Spring-Propelled Space Shuttle Travel?
- Edgar92
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Harmonic Motion of a pendulum Problem
- MorganJ
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How to find potential at center of square of point charges?
- look416
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Calculating image locations with thin lenses
- binhnguyent9
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How Far Are You From This Lens?
- binhnguyent9
- · Replies 4 ·
How Is the Initial Current Calculated in a Discharge Graph?
- Masafi
- · Replies 5 ·
Understanding Kirchhoff's Laws: Solving Circuits with Multiple Voltage Sources
- fluidistic
- · Replies 18 ·
Heat of fusion of water ice and dry ice (CO2) - need some insight
- Dumile
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Why are equipotential lines horizontal in a uniform field?
- Masafi
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Calculate Work done in square form?
- arslion
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Analysis of a circuit that contains two diodes
- jonjacson
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Time Dialation-Theory of Relativity
- AlmonzoWilder
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How Fast is the Wave with a 1-Second Echo?
- muhaimin
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Circular Motion: Plane does a loop
- thussain93
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How many air molecules in a 20×14×8 ft room?
- Teenytiny1991
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Finding x when Elastic Potential Energy equals Kinetic Energy
- rkelley7891
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How Do You Calculate Spring Constant and Mass for Oscillations?
- dynamity
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Velocity as a function of distance problem
- Slepton
- · Replies 4 ·
Simplifying torque equation with L terms
- cary1234
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Projectile Motion, Shooting a Ball in Zero Gravity.
- laxstud120
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Time of sunset using Radius of earth
- George3
- · Replies 12 ·
What was the initial speed of the archer's arrow?
- jwang023
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Calculate acceleration of the 4 kilogram block
- sobek
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Vectors. Adding, subtracting, and velocity questions
- Matt12345
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Sled accelerating down a hill with displacement data
- mybrohshi5
- · Replies 20 ·
How Is Diesel Engine Efficiency Calculated Using Compression and Cutoff Ratios?
- vladimir69
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Net Electric Field: Find Magnitude Midway Between 2 Particles
- nothingatall
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Net electric field with triangle
- nothingatall
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How Do You Calculate the Resultant Using Parallelogram Law and Trigonometry?
- jch11
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Which particles from space pass through the Earth
- Marilena1983
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Nonuniform Semicircle of Charge problem
- littlebilly91
- · Replies 11 ·
Why do positive charges not move in a conductor?
- lha08
- · Replies 3 ·
Why is it difficult to measure 2000 amps with a series meter?
- Masafi
- · Replies 1 ·
Work-Energy Theorem: Determine Distance for 73kg Skier w/ 4.2m/s
- Physicsgeeks1
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Throwing a baseball up in the air
- cdotter
- · Replies 4 ·
Special Relativity - Proper Length
- eprparadox
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What is the Net Electric Field at Point P Due to Two Charges on the X-Axis?
- Hashmeer
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What are some real-life applications of lenses?
- ap_cycles
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Radioactive Emission: Determining Half-Life
- henryc09
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Kinematics/uniform circular motion.
- Muneerah
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Solving a Physics Problem Involving a Hinged Stick and Clay
- zhenyazh
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Copper wire attached to the terminals of a cell
- Masafi
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Scaling of sphere radius, surface area and volume
- aquirk
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What is the Time of Travel for a Train Stopping at Multiple Stations?
- mybrohshi5
- · Replies 8 ·
Black Oil - Why Does It Appear All Colors?
- Marilena1983
- · Replies 5 ·
Gauss's Law and electric flux of a surface
- Keithkent09
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Principle of conservation of momentum
- Masafi
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Why does capacitor charging current decrease over time?
- Masafi
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Why is the kinetic energy ratio 60 in americium-241 alpha decay?
- Masafi
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Centripetal acceleration at equator
- Masafi
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Why should you not take a notebook computer through a metal detector?
- lampshader
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Block and spring collision - work
- zhenyazh
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Indiana Jones rope swing physics
- zhenyazh
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Horizontal Projectile Motion Problem
- temaire
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Twin paradox and Hafele-Keating experiment
- nicekarmajobs
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RC time constant lab, Current vs time
- Tjvelcro
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What is the force that acts tangential to fluid's surface
- jarman007
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Diffraction Grating, Light with two wavelengths
- AlmonzoWilder
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Electrical Work Done by Supply Transferring 0.80 nC Charge
- Masafi
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Minimum refractive index for total internal reflection at 45 degrees
- SirKhairin
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Speed and time for packet through tunnel in planet's center
- zhenyazh
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Solve Two Pulleys Problem: Find Minimum Tension Needed
- zhenyazh
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Proton passes parallel conducting plates
- Masafi
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Centre of Curvature: Turning Point or Centre?
- Masafi
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How can the stunt be possible with a minimum force of 600 N?
- Masafi
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Calculating Electric Field and Potential for a Line with Uniform Charge Density
- E92M3
- · Replies 11 ·
Jumping a Crevasse (Projectile Motion)
- Annan
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Rutherford's experiment alpha source
- Masafi
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Deriving moment of inertia of a spherical shell using surface integrals
- HHHisthegame
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One-layer atmosphere model for Venus surface and atmospheric temperatures
- Sunshin3
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Speed and acceleration of a stone in a rotating tire
- Muneerah
- · Replies 1 ·
Coin and Marble on a Frictionless Dome: When Will They Hit the Ground?
- Elo21
- · Replies 2 ·