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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Explain how an e.m.f. is induced in the secondary coil
- Air
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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 and Total Internal Reflection
- blaziken's_charizard
- · Replies 6 ·
Inclined Plane Newton's Law Problem
- vladimir69
- · Replies 3 ·
How Has Our Understanding of the Atom Changed Since Thomson's Model?
- 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
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Solving for When and Where Two Movements Meet
- napoodo
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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 ·
Wave Propagation in a Hanging Rope: Time for Reflection 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 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 ·
Understanding the Biot-Savart Law: Examining a Quarter Loop Example
- kasse
- · Replies 6 ·
Solve 6 Easy Homework Questions on Forces
- 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: 200m & 150m, 40km/hr & 45km/hr
- 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 ·
Time to Cross Trains: 200m & 150m, 40km/hr & 45km/hr
- 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 ·
Investigating the contact times between a golf club and a golf ball
- Air
- · Replies 1 ·
Thin rod suspended freely on end and dropped. KE and Center of Mass
- rosstheboss23
- · Replies 10 ·
Understanding Gyroscope Physics: Solving the Tilt and Spin Mystery
- 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 ·
Solving Rotational Motion Problem: Get Answer for Revolutions
- 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 ·
Why Is Gauss' Law Failing to Solve This Problem?
- danago
- · Replies 6 ·
Can You Solve These Amusement Park Physics Puzzles?
- kaykay
- · Replies 2 ·
Entropy Change of an expanding 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 ·
Carey Foster Bridge: Galvanometer & Its Opposite Deflections
- 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 ·
What is the Phase Change for Reflection Between Different Refractive Indices?
- Monochr
- · Replies 2 ·
Relativistic kinetic energy and proton collisions
- Vuldoraq
- · Replies 4 ·
Solving Sound Wave Phase Difference: Analysis of (x,y,z) Co-ords
- fredrick08
- · Replies 9 ·
Calculate Magnetic Force and Currents | Magnitude Question-Help
- Bradsteeves
- · Replies 11 ·
Problem involving tension, circular motion, and equilibrium
- crazyog
- · Replies 1 ·
Thermodynamics - efficiency of power plant
- fredrick08
- · Replies 8 ·
Rotational kinetic energy and power
- warmfire540
- · Replies 5 ·
Celestial Mechanics: Earth Orbit Time & Why 80 Minutes is Impossible
- a.a
- · Replies 5 ·
Completely Lost in this Physics Problem Sinusoidal transverse waves
- cahardy86
- · Replies 4 ·
Meteoric Radiation Decay Question Check
- TFM
- · Replies 1 ·