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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Finding Earth's atmosphere mass from air density and pressure
- nikita33
- · Replies 1 ·
Electron deflection between parallel plates with missing distance
- DMac
- · Replies 4 ·
Calculating Kinetic Energy of Meteor
- vandorin
- · Replies 3 ·
Particle Collision: Calculate Photon Wavelength
- Air
- · Replies 1 ·
Torque from electric force on proton at rod end
- clearwaterkid
- · Replies 1 ·
Frequency of echo received by a moving bat using Doppler effect
- Dreams2Knight
- · Replies 6 ·
Explain how an e.m.f. is induced in the secondary coil
- Air
- · Replies 5 ·
Plug in time to find the acceleration
- Jason03
- · Replies 3 ·
How Did Magnetism Influence the Development of the Telephone?
- troubleinphys
- · Replies 5 ·
Horizontal Range (with incline)
- jesuslovesu
- · Replies 4 ·
How Does Electric Field Influence Electron Movement in a Capacitor?
- Gunman
- · Replies 3 ·
Refraction angle and total internal reflection in a glass prism
- blaziken's_charizard
- · Replies 6 ·
Inclined Plane Newton's Law Problem
- vladimir69
- · Replies 3 ·
Three ways atomic models changed since Thomson's discovery
- Air
- · Replies 1 ·
What is the speed of water leaving a trough with a hole near the base?
- European Sens
- · Replies 7 ·
How Does the Photoelectric Effect Determine Planck's Constant?
- sofreshjay
- · Replies 1 ·
Calculating Schwarzschild Radius at Galaxy's Core
- mantillab
- · Replies 2 ·
Solving for When and Where Two Movements Meet
- napoodo
- · Replies 3 ·
Frequency of Horn: Solving Doppler Equation
- European Sens
- · Replies 4 ·
What is the terminal speed of the paratrooper?
- European Sens
- · Replies 5 ·
Calculating Momentum and Direction in a Skating Collision
- 99jolegg
- · Replies 6 ·
Time for wave to travel up hanging rope and return
- wayfarer
- · Replies 4 ·
Find length of a string, given a strange condition
- wayfarer
- · Replies 6 ·
Relation between speed in water and weight
- davidthe30
- · Replies 1 ·
Electric potential midway between two point charges
- ryanverbena
- · Replies 1 ·
Radius of Circular Path Affected by Magnetic Force: Increase or Decrease?
- Gunman
- · Replies 1 ·
Speed of a ball launched from a spring
- cilantrone
- · Replies 1 ·
Signs Before 9.8 m/s^2 in Motion Questions
- 9giddjl
- · Replies 2 ·
Space Travel - Lorentz Transformation
- Icheb
- · Replies 1 ·
How Does Integrating Magnetic Field in a Solenoid Result in BL?
- kasse
- · Replies 1 ·
Why does the quarter loop Biot-Savart calculation have pi in the answer?
- kasse
- · Replies 6 ·
Six forces problems: curved motion, net force, free fall, action-reaction, and tug of war
- vandorin
- · Replies 4 ·
Length Contraction: Calculate Observed Length w/o and w/ Theory of Relativity
- Icheb
- · Replies 1 ·
Transverse sinusoidal wave on a string
- K3nt70
- · Replies 14 ·
Two trains crossing on parallel rails moving in the same direction
- neha1
- · Replies 1 ·
The Physics Involved in Coal-Fired Generation of Electricity
- troubleinphys
- · Replies 1 ·
Measuring the Diameters of the Moon at Perigee and Apogee
- crystalplane
- · Replies 1 ·
Length of Spring: How Can the Unstretched Length Be Determined?
- ttiger2k7
- · Replies 4 ·
Electric Field Between Two Parallel Plates
- DMac
- · Replies 5 ·
Solving Nuclear Problem: Minimum Photon Energy
- matt222
- · Replies 3 ·
How Do You Calculate Spring Stretch for Specific Launch Distances and Angles?
- psp101
- · Replies 4 ·
Two trains crossing each other in the same direction
- neha1
- · Replies 1 ·
Is the Electric Field Zero Inside an Infinitely Long Cylinder?
- kasse
- · Replies 2 ·
How to Calculate Angular Velocity and Acceleration for a Rotating Cylinder?
- Zhadows
- · Replies 3 ·
Calculating Efficiency of a Heat Engine with COP = 5.0 and 25kJ Heat Removal
- kasse
- · Replies 1 ·
Checking Voltage Drop while Supplying 6A Current
- mares0909
- · Replies 1 ·
Capacitor discharge with pendulum impact contact times
- Air
- · Replies 1 ·
Thin rod suspended freely on end and dropped. KE and Center of Mass
- rosstheboss23
- · Replies 10 ·
Why does a gyroscope precess when tilted?
- kasse
- · Replies 2 ·
Determine the wavelenghts of photons
- soul5
- · Replies 1 ·
Calculate Work on Trunk going up Incline
- bartman
- · Replies 1 ·
Induced Electric Fields of metal ring
- aznkid310
- · Replies 5 ·
How Does Projectile Mass Affect Exit Speed in Physics?
- dtl42
- · Replies 6 ·
When Does the Angular Velocity of a DC Motor Reach Zero?
- nateshoe
- · Replies 3 ·
How Does Friction Affect a Rolling Object That Begins to Skid?
- kasse
- · Replies 1 ·
How to Determine Uncertainty of a Probability with Experimental Data?
- mudkip9001
- · Replies 2 ·
Speed, Displacement, and Velocity Question
- Jordan_
- · Replies 1 ·
Relativistic Doppler Shift Equation - Derivation
- TFM
- · Replies 7 ·
What is the Resistance in a Discharging Capacitor Circuit from a V-time Graph?
- max1205
- · Replies 5 ·
How Does Lens Focal Length Affect Image Distance?
- lenaosu
- · Replies 3 ·
Spacelike, timelike, relativity and simultaneity of events
- TFM
- · Replies 17 ·
What is the minimum muzzle velocity required to melt a lead bullet on impact?
- terry2112
- · Replies 6 ·
How many revolutions before rotor comes to rest?
- Jason03
- · Replies 6 ·
Displacement Current and air space
- aznkid310
- · Replies 3 ·
Calculate the maximum speed of 100g pendulum mass
- Dgolverk
- · Replies 14 ·
How do I find the acceleration of a mass on a table?
- kasse
- · Replies 4 ·
Projectile Motion of shot cannon ball
- jesuslovesu
- · Replies 5 ·
Angular Velocity [SOLVED] for Flywheel Generator Problem
- kasse
- · Replies 1 ·
Frequency of Undamped, Forced Oscillation with Negligible Damping
- K3nt70
- · Replies 2 ·
Why Does My Calculation of Wire Length Differ from the Textbook's Answer?
- kasse
- · Replies 1 ·
Potential difference on a charge between insulating plates
- clope023
- · Replies 8 ·
Calculate the coefficient of friction between the two bundles of candy
- TheLegace
- · Replies 6 ·
Calc Projectile motion horizontal velocity
- H3lpPlz
- · Replies 3 ·
Find Mass of Unknown Particle in Elastic Collision
- Reshma
- · Replies 6 ·
Finding Magnitude of Force of a Nucleus
- AnkhUNC
- · Replies 2 ·
Voltage, Current, Resistance Relationship
- Air
- · Replies 9 ·
How Does Pascal's Principle Apply in Hydraulic Systems?
- chukie
- · Replies 1 ·
Applying Gauss' law to find the electric field
- danago
- · Replies 6 ·
Can You Solve These Amusement Park Physics Puzzles?
- kaykay
- · Replies 2 ·
Entropy change for isothermal expansion of ideal gas
- cmcc3119
- · Replies 2 ·
Simple Physics Problem: Finding c in a Particle's Position Equation at t = 3.0 s
- AnkhUNC
- · Replies 1 ·
Two engineers, a physicist, and an orbital mechanist can't figure this out
- blochwave
- · Replies 3 ·
Electricity and Magnetism question.
- hhhmortal
- · Replies 2 ·
What is the center of mass of the canoe when a woman walks across it?
- Peach
- · Replies 12 ·
Can a Moving Rod in a Magnetic Field Produce a Voltage?
- Durato
- · Replies 5 ·
Why does a galvanometer deflect oppositely at both ends of a Carey Foster bridge?
- anam89
- · Replies 2 ·
Questions about waves and light
- ys2050
- · Replies 2 ·
Electric Force between glass ball and rubber ball
- Zokudu
- · Replies 1 ·
Solving Rotational Motion Problem: Find Acceleration
- Jason03
- · Replies 5 ·
Circular motion of a subway train
- Cantworkit
- · Replies 1 ·
Can an NPN Transistor Light Up a Bulb?
- dumguy
- · Replies 1 ·
Calculating Speed of Golf Ball After Contact
- jinman
- · Replies 4 ·
Mass sliding down incline with spring
- fireearthair8
- · Replies 3 ·
Projectile Motion and Speed: Solving for Initial Velocity and Height
- dano404
- · Replies 5 ·
Solve 10km Train Acceleration Problem in 6 Mins
- speedy46
- · Replies 22 ·
How Do Electric and Magnetic Fields Behave Around a Moving Electron?
- gstrosx
- · Replies 1 ·
Phase change for reflections between three layers with n1 < n_f > n3
- Monochr
- · Replies 2 ·
Relativistic kinetic energy and proton collisions
- Vuldoraq
- · Replies 4 ·
Phase difference between two points for spherical sound wave
- fredrick08
- · Replies 9 ·
Finding two currents from magnetic force between parallel conductors
- Bradsteeves
- · Replies 11 ·