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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Schrödinger Equation: Solving for Energy in a Semi-Infinite Square Well"
- Ashley1nOnly
- · Replies 3 ·
Can You Focus on Two Distances at Once?
- fridakahlo
- · Replies 1 ·
Calculating Velocity Vector for Cue Ball Collision
- Magnus Jahn
- · Replies 1 ·
Distribution of acceleration over axes
- JamieJoe
- · Replies 2 ·
Question on energy conservation with centripetal acceleratio
- RoboNerd
- · Replies 2 ·
How does friction create spin in a tennis ball
- Jainal
- · Replies 2 ·
What is the third force acting on a plank attached to a wall by a hinge?
- Jimmy87
- · Replies 5 ·
Work done by a 20% efficient heat engine
- kokodile
- · Replies 23 ·
Is linear momentum conserved when a ball hits a pivoted rod?
- RoboNerd
- · Replies 8 ·
Why does centripetal force not apply in gravitation problem?
- Dennis Heerlein
- · Replies 2 ·
What Happens to Angular Acceleration and Moment of Inertia in a Pulley System?
- Daisy Muller
- · Replies 2 ·
How to calculate the potential energy of a spring?
- ramialsaiad
- · Replies 47 ·
Car coasting up a 20-degree slope after running out of gas
- Julia Coggins
- · Replies 8 ·
Calculating Work Done by an Electron in an Electric Field
- JulienB
- · Replies 12 ·
What is the width of a square well if its ground-state energy is 2.50 eV?
- meaghan
- · Replies 3 ·
Image formed by lens-water-mirror system
- ConorDMK
- · Replies 3 ·
Warren's Cannonball Launch Velocity?
- Brady Aucoin
- · Replies 10 ·
Calculating Major Head Loss Due to Pipe Friction
- foo9008
- · Replies 18 ·
Young's Modulus Question: stretch of a wire
- DanT
- · Replies 1 ·
Ratio of Power between Two Cars
- Balsam
- · Replies 14 ·
Calculating Oil Flow Rate in Cast Iron Pipe
- foo9008
- · Replies 5 ·
Calculating Intensities of Out-of-Phase Sound Waves
- PrettyLights
- · Replies 1 ·
Finding planet's rotation period from equatorial gravity
- Balsam
- · Replies 9 ·
Force Direction: Understanding Upward Motion on Lowering Objects
- Balsam
- · Replies 2 ·
Final Velocity Calculation for Inelastic Collision of Freight Trains
- rrosa522
- · Replies 1 ·
Physical Pendulum - Rod - Period and Distance From Center of Mass
- ing_it
- · Replies 22 ·
Damped and undamped oscillations (integration?)
- JulienB
- · Replies 6 ·
Find the force a distance from a fixed point
- ferociablejbear
- · Replies 17 ·
Kinematic Question -- Car braking to avoid hitting a fox
- Evangeline101
- · Replies 2 ·
What is the function of a car muffler and how does it work?
- alexandria
- · Replies 5 ·
Calculating time of zero g (Glider)
- Bradley87
- · Replies 19 ·
Start-up acceleration, max speed and torque of a transfer car
- r_prieto5
- · Replies 9 ·
Newtonian mechanics; word problem; calculate forces
- late347
- · Replies 7 ·
Pendulum Length and Period Calculations
- reminiscent
- · Replies 6 ·
How do I Taylor expand the gravitational field in terms of h/R <<1?
- spacetimedude
- · Replies 1 ·
Which Formula for Friction Factor in Rough and Smooth Pipes?
- foo9008
- · Replies 5 ·
Speed of charged particle moving in E and B fields
- AnwaarKhalid
- · Replies 3 ·
Block on incline with weight, horizontal force, and normal pressure
- jove8414
- · Replies 5 ·
Sine Wave Questions: Wavelength, Frequency, Speed
- PrettyLights
- · Replies 2 ·
Acceleration around a running track
- Ardinos
- · Replies 3 ·
Calculating Vertical Force on a Fireman Sliding Down a Pole
- Amelina Yoo
- · Replies 2 ·
Finding deceleration of a ball?
- Amelina Yoo
- · Replies 5 ·
Maximal repellence between charged spheres
- JulienB
- · Replies 6 ·
Implementing wind into projectile calculation.
- lamborghini
- · Replies 2 ·
Which Object Will Roll Farther: Solid Cylinder or Hoop on an Incline?
- Keissterr
- · Replies 2 ·
Force to accelerate 2.0 kg ball at 3.0 m/s² horizontally vs vertically
- Amelina Yoo
- · Replies 1 ·
Find Speed of 65kg Diver Diving off 10m Tower
- Amelina Yoo
- · Replies 1 ·
How Is the Vertical Force on a Sliding Fireman Calculated?
- Amelina Yoo
- · Replies 1 ·
Finding Maximum Number of Interference Maxima?
- hrf2
- · Replies 3 ·
Standard error in speed of sound wave larger than measured value
- Erenjaeger
- · Replies 2 ·
Calculating frequency and wavelength in solution
- Carrie
- · Replies 2 ·
Distance from an initial position that two objects will meet
- Amelina Yoo
- · Replies 1 ·
Finding acceleration of an object given force and mass?
- Amelina Yoo
- · Replies 1 ·
How does the rotation of a diver in the air conserve angular momentum?
- Jainal
- · Replies 7 ·
How to find tension in a rope when given the force?
- Amelina Yoo
- · Replies 4 ·
Finding acceleration of a car when it is braking
- Amelina Yoo
- · Replies 1 ·
How to find the distance the block travels?
- marieb
- · Replies 1 ·
Light cone angle from a lamp moving at v = c/4
- radimkupcak
- · Replies 5 ·
Entropy of mixing - Ideal gas. What is x?
- navm1
- · Replies 4 ·
Electric Potential and charge flowing between 2 spheres
- erisedk
- · Replies 17 ·
SigFigs in Volume and Uncertainty?
- maxhersch
- · Replies 4 ·
Finding angle of refraction given angle of incidence?
- Martin Hanna
- · Replies 16 ·
Estimate gravitational energy from supernova
- henrco
- · Replies 3 ·
What is the maximum height of a spring toy launched at an angle?
- Evangeline101
- · Replies 4 ·
Archived Why Use m=8 for Calculating Thin Film Interference?
- mm2424
- · Replies 1 ·
How does high internal resistance make high voltage power supplies safe?
- Aimhigh
- · Replies 1 ·
Understanding Internal Resistance in Batteries
- physicsmaths1613
- · Replies 6 ·
Electric field strength in metal sphere
- Janiceleong26
- · Replies 2 ·
Interference vs. diffraction patterns
- vetgirl1990
- · Replies 2 ·
How Does Binding Energy Affect Mass in Nuclear Reactions?
- DiamondV
- · Replies 2 ·
Hydrogen Electron Transitions (Allowed/Forbidden)
- A R
- · Replies 2 ·
Determine the compression in the spring
- rrosa522
- · Replies 7 ·
Finding Increase in Temperature for Two Rods
- jfulky
- · Replies 3 ·
Ball is thrown vertically upward from a window
- totomyl
- · Replies 9 ·
Quantity of heat and changes of state
- JulienB
- · Replies 11 ·
Finding Power when no time or velocity are provided?
- samg1
- · Replies 6 ·
Audio Amp with negative feedback
- Marcin H
- · Replies 7 ·
Satellites Orbits and Energy Problem
- i_hate_math
- · Replies 7 ·
Problem with equation / proving formula
- Trec93
- · Replies 2 ·
Quantum Physics: Work Function and Electric Potential
- JohnGaltis
- · Replies 1 ·
Time to fill a 1m³ box from a 15mm pipe in laminar compressible flow
- JayeOFarrell
- · Replies 5 ·
Why Does Angular Momentum Stay Constant for a Spinning Ice Skater?
- xXhumans0monstersXx
- · Replies 2 ·
EMF about a loop moving toward a wire with current
- Afterthought
- · Replies 1 ·
Electric Field in all of space from charges along the Z-axis
- Kernul
- · Replies 10 ·
Why is vertical velocity nonzero when a rolling ball hits the floor?
- Bob Rudd
- · Replies 2 ·
Deriving back focal length using Fermat's principle
- Woolyabyss
- · Replies 1 ·
Young's Double Slit with 2 Wavelengths variant
- JohnGaltis
- · Replies 4 ·
Power delivered by battery in simple RL circuit
- Taulant Sholla
- · Replies 1 ·
Electric field from perpendicular dipoles at point on x-axis
- Ujjwal28
- · Replies 9 ·
Relativity and Lorentz Transformations
- little neutrino
- · Replies 1 ·
Minor loss due to sudden expansion
- foo9008
- · Replies 8 ·
Newton's laws -- Block sliding on a Prism
- Prathamesh
- · Replies 12 ·
What is the force acting on the fixed points of an inclined bar?
- physea
- · Replies 1 ·
Calculating Wavelength from Radiative Power and Orbital Geometry
- vetgirl1990
- · Replies 4 ·
[Mechanics] Circular motion outside sphere
- sushichan
- · Replies 2 ·
Is distance traveled proportional to relativistic momentum?
- JuliusCSquared
- · Replies 1 ·
Why can force increase when charged spheres touch and separate?
- Ujjwal28
- · Replies 21 ·
Working out tension of string holding a ball underwater
- Alice Martin
- · Replies 3 ·
Two blocks connected by string over pulley with applied force
- crichardson17
- · Replies 7 ·
What Causes Pressure Changes Along a Pipe?
- foo9008
- · Replies 33 ·