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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Lorentz Transformation, Time Dilation, Length Contraction
- Kunhee
- · Replies 11 ·
Determining Maximum Lamp Mass for Coplanar Force System
- Robb
- · Replies 9 ·
How Does the Charge Q Affect Forces Between Q1 and Q2?
- 1729
- · Replies 9 ·
Examine the circuit and answer the questions grade 11 physics
- joshua cruwys
- · Replies 3 ·
Find current and PD across a circuit with diodes
- moenste
- · Replies 13 ·
Calculate the voltmeter reading
- moenste
- · Replies 3 ·
Conservation laws in rotational movement
- MPat
- · Replies 5 ·
Find mass per unit length of a string graphically
- jbumbes
- · Replies 5 ·
Finding Max Velocity of Rocket Sled
- Mr Davis 97
- · Replies 23 ·
Solve the differential equation F=F0+kv
- OmegaKV
- · Replies 5 ·
Modern Physics question -- an atom ejecting a relativistic electron
- Dan350
- · Replies 3 ·
Is it possible for opposite charges to repel each other?
- NkaujHelp
- · Replies 7 ·
How Do You Determine the Inertia of Cart A?
- emily081715
- · Replies 43 ·
Tower Crane Forces: Find the Mass of Counterweight
- Rafa54G2
- · Replies 13 ·
Examine the following circuit and complete the table
- joshua cruwys
- · Replies 2 ·
Maximum change in the kinetic energy of a particle
- TheSodesa
- · Replies 23 ·
Atom Volume Calc: Find the Volume of a Lead Atom
- Kpgabriel
- · Replies 16 ·
Minimum velocity required by grasshopper
- Googlu02
- · Replies 19 ·
Momentum and Inertial Reference Frame
- jjkim623
- · Replies 1 ·
Total Heat Flow Calculation for Isothermal Expansion of Diatomic Gas
- brandonmm1
- · Replies 3 ·
Bernoulli's equation and water exit speed from tank opening
- Derek1997
- · Replies 29 ·
Resistance of a network between two points
- moenste
- · Replies 11 ·
How Does Closing Switches Affect Charge Stored in Parallel Plate Capacitors?
- songoku
- · Replies 12 ·
Momentum problem: 2 carts, finding initial speed
- emily081715
- · Replies 13 ·
Calculating the Force on a Fire Truck Pumping Water onto a Burning Building
- Mr Davis 97
- · Replies 5 ·
Solving Impulse on Jumper for 50 kg Woman
- Mr Davis 97
- · Replies 9 ·
Identifying forces in a friction problem
- Hans Herland
- · Replies 8 ·
Simple constant acceleration/equation of motion question
- Touran Khan
- · Replies 6 ·
How can I find the critical mu of friction?
- student34
- · Replies 32 ·
Maximum compression in the spring
- decentfellow
- · Replies 7 ·
Max Jumping Height in Elevator Descending at Constant Vel.
- Virsis
- · Replies 1 ·
Value of Spring Stiffness k in Free Vibration of Mass-Spring System
- Canada95
- · Replies 11 ·
How can I be sure of my numerical result?
- Elvis 123456789
- · Replies 7 ·
Finding the velocity of two charges
- NkaujHelp
- · Replies 1 ·
Finding the Electric field at the Origin
- NkaujHelp
- · Replies 1 ·
Surface Brightness at any angle
- dykuma
- · Replies 3 ·
Two capacitors in parallel: potential difference/energy
- space-time
- · Replies 5 ·
Why is the equation for compression work P=kV and not P=Pi/Vi?
- grandpa2390
- · Replies 1 ·
Calculating Inertia Ratios of Carts on a Low-Friction Track
- emily081715
- · Replies 8 ·
Heat capacity under constant pressure or volume question
- Joker93
- · Replies 61 ·
Finding frequencies and wavelengths
- givemeknowledge
- · Replies 2 ·
Calculating Torque and Work of an Electric Dipole in a Uniform External Field
- ooohffff
- · Replies 11 ·
Does displacement=shortest length of position (final-initial)?
- natsuki91xp
- · Replies 10 ·
Point between two wires at which the flux density is zero
- moenste
- · Replies 4 ·
Algebraic expressions for the amount of time that elapses
- emily081715
- · Replies 2 ·
What is the final charge and potential difference on each capacitor?
- ooohffff
- · Replies 3 ·
Magnitude of the change in momentum equation
- emily081715
- · Replies 13 ·
Why does Water Vapor have 12 degrees of freedom?
- grandpa2390
- · Replies 9 ·
Calculating Energy and Mass in Espresso Machine and Analyzing Cooling of Coffee
- moenste
- · Replies 33 ·
What is the pressure needed to sedate a dog in 1 second?
- Derek1997
- · Replies 17 ·
Initial velocity to get from on known position to another?
- floyd0117
- · Replies 2 ·
Calculation of atmospheric presure
- Derek1997
- · Replies 9 ·
What is magnetic field made up of?
- Zheng_
- · Replies 8 ·
How Does Charge Distribution Affect Electric Field in a Ring?
- Diego Rolim Porto
- · Replies 1 ·
Acceleration vs. Time graph confusion
- Ryan1983
- · Replies 1 ·
What does magnetic field is made up of?
- Zheng_
- · Replies 1 ·
Resistance for an incomplete circuit
- novelriver
- · Replies 2 ·
Inelastic collision: final velocity after collision
- emily081715
- · Replies 5 ·
Calculating Voltage and Farads for Efficient Rail Gun Launch
- RED119
- · Replies 3 ·
Postion vs time graph without time or initial speed?
- Cosmik11
- · Replies 3 ·
Calculating Work Done by a Variable Force: Tips and Techniques
- DumSpiroSpero
- · Replies 6 ·
Relativistic Energy and Velocity
- PhysicsInNJ
- · Replies 2 ·
Write a computer program to solve for time of a falling body
- Elvis 123456789
- · Replies 5 ·
What is the Average Speed of a Cyclist on a Multi-Stage Journey?
- Zablas
- · Replies 10 ·
Solve for friction coefficient of block on sp
- tensor0910
- · Replies 1 ·
Probability of finding a particle in an infinite well
- Titan97
- · Replies 1 ·
Statics: Finding the moment on point B?
- Vanessa Avila
- · Replies 3 ·
This Projectile motion question seems flawed
- victorhugo
- · Replies 13 ·
Use Kirchoff's laws to solve for tension and current
- Cocoleia
- · Replies 3 ·
What Is the Angle Between Position Vectors AB and AC?
- Robb
- · Replies 7 ·
Is This the Right Approach to Solving Kinematics Problem A?
- sens
- · Replies 3 ·
Significant Figures & Error Analysis
- Godisnemus
- · Replies 11 ·
Potential difference of helium nucleus question
- ooohffff
- · Replies 2 ·
RMS of square wave and alternating currents
- moenste
- · Replies 2 ·
Resonance of a Stretched String
- Taniaz
- · Replies 25 ·
Wavelength of the sounds at zero degrees
- moenste
- · Replies 7 ·
How to gain percentage of atoms that are ionized in balloon?
- TwoEG
- · Replies 3 ·
Relative velocity ship problem intuitively
- anurag07
- · Replies 3 ·
Calibrate Spectroscope to Find Wavelength
- allenlistar
- · Replies 3 ·
Falling object in a gravitational field with v^2 drag force
- Elvis 123456789
- · Replies 9 ·
Finding the speed of a book against a vertical wall
- Vanessa Avila
- · Replies 6 ·
How to solve for the magnitude and angle in this situation?
- Vanessa Avila
- · Replies 13 ·
Proving Gauss Law using a "bad" Gaussian surface
- math4everyone
- · Replies 3 ·
Three Dimensional Projectile motion
- Veronica_Oles
- · Replies 15 ·
Electric field due to a charged rod
- Jabbar
- · Replies 14 ·
How Fast is the Airplane Flying Relative to the Air?
- Teslapb
- · Replies 17 ·
Dual electron repulsion (momentum question)
- mikemartinlfs
- · Replies 7 ·
Block attached to a cord on an inclined plane
- Cocoleia
- · Replies 1 ·
Block projected up inlcline with initial speed
- Cocoleia
- · Replies 3 ·
Solving Mass Flow Problem Homework
- Mr Davis 97
- · Replies 2 ·
Rb-87 Half Life Calculation: 478 Bq/g
- Umang
- · Replies 1 ·
Percentage Uncertainties Question
- Benge
- · Replies 11 ·
An oscillating mass within an orbiting spacecraft question
- Old_sm0key
- · Replies 8 ·
Solving Cartesian Vectors in Mechanics: Expressing Force F(AB) in Cartesian Form
- Robb
- · Replies 15 ·
Find the maximum distance the spring will be compressed?
- ChloeYip
- · Replies 2 ·
Relate wavelength and energy scale
- senobim
- · Replies 35 ·
Find the wavelength of the blue line (line spectrum)
- moenste
- · Replies 4 ·
Calculating Total Internal Energy for a Monatomic Gas at Constant Pressure
- john mcgrain
- · Replies 4 ·
Why Does a2 Equal m1g/m2 in an Accelerating Pulley System?
- CausticPhantom
- · Replies 3 ·
Pressure Problem: Solving for Average Pressure
- grandpa2390
- · Replies 14 ·