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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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 ·
What Does Number of Diameters Mean in Pipe Flow Analysis?
- foo9008
- · Replies 10 ·
Ice skaters collision with angle
- fantisism
- · Replies 10 ·
What Is the Minimum Time for SHM Particle to Travel Between Two Points?
- gracy
- · Replies 34 ·
What is a method to find the fundamental frequency of a pipe
- Zoro
- · Replies 2 ·
Collision with an unknown mass and velocity after
- fantisism
- · Replies 3 ·
What Determines the Normal Force on a Ball in a Loop-the-Loop?
- fantisism
- · Replies 15 ·
Law of universal gravitation and Kepler's law
- Dietrichw
- · Replies 29 ·
Physics - proving the stopping distance of a car
- totomyl
- · Replies 4 ·
[Rotational dynamics] cube sliding on a dish
- FranzDiCoccio
- · Replies 5 ·
How Can Constant Electric Field Be Achieved in a Spherical Charge Distribution?
- Kernul
- · Replies 26 ·
Understanding Forces on a Toppling Bicycle Wheel
- Vatsal
- · Replies 4 ·
How to solve for distance of object with a concave mirror?
- AngelLegs
- · Replies 1 ·
How do virtual condition and MMC apply to this tolerance problem?
- theone
- · Replies 1 ·
Weighted average of Hubble's constant with asymmetric errors
- Matt atkinson
- · Replies 4 ·
A light-dimmer switch with a potentiometer
- Asylum
- · Replies 4 ·
How Do You Calculate the Momentum of a Puck After a Collision?
- rrosa522
- · Replies 5 ·
Density floating problem, wood and lead
- SadPanda6022
- · Replies 2 ·
[Mechanics] Tension in bungee jumping
- sushichan
- · Replies 3 ·
What does n represent in the head loss formula for pipe friction?
- foo9008
- · Replies 12 ·
Resultant force at elbow from water flow
- foo9008
- · Replies 43 ·
Thin films: reflection between glass plates
- vetgirl1990
- · Replies 1 ·
Calculating Relative Speed of Objects Moving Away from Earth
- Woolyabyss
- · Replies 4 ·
What is the meaning of r in the equation 2t=mλ for dark fingers?
- kenok1216
- · Replies 1 ·
Electric charges and fields: Semicircular charge distributions
- Ujjwal28
- · Replies 4 ·
Solving Pipe Flow: Understanding Why $\tau =\mu(-dV/dR)$
- foo9008
- · Replies 3 ·
About thin film (max bright/dark)
- kenok1216
- · Replies 5 ·
Relativistic Time Dilation and Length Contraction in Overtaking Rockets
- little neutrino
- · Replies 3 ·
The Classic Pole in Barn Relativity Question
- little neutrino
- · Replies 2 ·
Designing a driven spring mass system for school project
- RubinLicht
- · Replies 1 ·
Power and pressure of radiation. Is my answer correct?
- loki4000
- · Replies 1 ·
Angle of flashlight beam reflecting off mirror into eyes
- AngelLegs
- · Replies 5 ·
Rotational period for constant mass but different volume
- ht9000
- · Replies 22 ·
Finding spring balance tension in a pulley system with applied force
- AbhinavJ
- · Replies 9 ·
Experiment to measure frequency of de Broglie waves
- VonNathan
- · Replies 1 ·
How to calculate spatial resolution from θmin=1.22λ/D
- kenok1216
- · Replies 9 ·
Velocity along a frictionless surface
- Anjum S Khan
- · Replies 6 ·
Calculating Magnetic Levitation Force for Maglev Train Prototype
- Robb
- · Replies 2 ·
Can Fa = -Fb Solve E-Field Problem Faster Than Calculating at Part 1?
- kenok1216
- · Replies 12 ·
Kirchhoff's Law Problem -- Resistors in Series and Parallel and a Switch
- DevonZA
- · Replies 15 ·
How Does Zero Gravity Affect the Tension in Strings of Charged Bodies?
- Ujjwal28
- · Replies 3 ·
Kirchhoff's voltage law problem: Batteries, switches, resistors
- kenok1216
- · Replies 2 ·
Does it take more fuel to reach the moon or return to Earth orbit?
- Septim
- · Replies 17 ·
Electroreception, Electric field and charges
- Shima97
- · Replies 1 ·
Heat Capacity of Distinguishable Particles
- BOAS
- · Replies 2 ·
Simple harmonic oscillation: uniform rod
- vetgirl1990
- · Replies 3 ·
Gravity due to a uniform ring of mass
- i_hate_math
- · Replies 12 ·
Calculating the Maximum Mass of a Black Hole at a Given Distance
- i_hate_math
- · Replies 8 ·
If light travels for 3.0ns in ethyl alcohol, how much furthe
- tangowhiskey
- · Replies 6 ·
Finding velocity of lump of clay. (Not too sure on answer)
- fantisism
- · Replies 1 ·
What Angle Does Light Emerge from a Prism?
- OhBoy
- · Replies 4 ·
Ball rolls without sliding in a concave bowl
- Karol
- · Replies 8 ·
Observing the Effects of Sound Wave Diffraction: A Demonstration Experiment
- Faiq
- · Replies 3 ·
Projectile Motion of water balloon
- Evangeline101
- · Replies 10 ·
Estimate the uncertainty in electron's position.
- Steelers72
- · Replies 4 ·
What is the speed of three stars rotating in an equilateral triangle?
- i_hate_math
- · Replies 5 ·
How to calculate the electric potential inside of a sphere
- Vosegus
- · Replies 3 ·
How Does an Electromagnetic Wave Propagate in Glass?
- TheSodesa
- · Replies 3 ·
GPE and gravitational force exerted by a ring
- GwtBc
- · Replies 3 ·
Double pulley Atwood machine (with 3 masses)
- Sho Kano
- · Replies 97 ·
Finding the deBroglie wavelength: conceptual issue
- bachfromthedead
- · Replies 4 ·
Find the maximum thermodynamic efficiency
- kelvin56484984
- · Replies 2 ·
Angular momentum of a particle with a symmetrical path
- doneky
- · Replies 3 ·
Kirchoff's method for a weird circuit
- Sho Kano
- · Replies 20 ·
Calculating the power transformed in a real battery
- Faiq
- · Replies 3 ·
Charged particles moving through a magnetic field
- KieranRC
- · Replies 11 ·
Finding an electric field at a point from a line of charge
- Physiqs
- · Replies 4 ·
Why do commuting operators M₁ and M₂ give that second line?
- Raptor112
- · Replies 5 ·
Single Slit Diffraction Intensity
- Woolyabyss
- · Replies 3 ·
Photon colliding with moving electron
- Giorgi1997
- · Replies 8 ·
Child sliding down slope then horizontal surface with friction
- eefje
- · Replies 21 ·
What is the maximum induced EMF in a rotating contour near a straight wire?
- Ivan Antunovic
- · Replies 38 ·
Archived Is a 'Light-Boom' Possible at the Speed of Light?
- matthewfullhart
- · Replies 2 ·
Doppler effect Formula manipulation
- Trec93
- · Replies 6 ·
Rate of Increase in Water Level Due to Falling Cone in Cylinder
- Priyadarshi Raj
- · Replies 6 ·
Circuit Problem -- With only a battery in the circuit, will current flow?
- Faiq
- · Replies 21 ·
Difficult energy conservation/rotational energy problem
- doneky
- · Replies 1 ·
Finding currents and voltages in circuit with two batteries and three resistors
- kamhogo
- · Replies 3 ·
Refracted light power with unpolarised beam at Brewster's angle
- JohnGaltis
- · Replies 2 ·
What is the speed of Sputnik I when it was at its perigee around Earth in 1957?
- Tissue
- · Replies 7 ·
Quantum Physics - Infinitely vs Finite depth quantum well
- whatphysics
- · Replies 1 ·
How to choose the starting friction factor for pipe diameter iteration
- foo9008
- · Replies 14 ·
Archived Electromagnetic Induction of ac generator
- sadean1s
- · Replies 2 ·
Firefighter sliding down pole onto spring
- doneky
- · Replies 4 ·
Using d'Alembert's principle to find acceleration on a rough surface
- Owen Griffiths
- · Replies 6 ·
What is R in the transition section of the Moody chart?
- foo9008
- · Replies 25 ·
Find distance from COM using torque
- Notre Dame
- · Replies 8 ·
Pressure Difference: Is the Solution Wrong?
- foo9008
- · Replies 6 ·
Rate body temperature increases given rate of heat transfer?
- CrashMaverick
- · Replies 1 ·
True vs. Apparent weight question
- pauladancer
- · Replies 10 ·
How Does Light Intensity Change Through Multiple Polarizers?
- Sgtsloth
- · Replies 6 ·
A Problem In Electromagnetic Phenomena
- vijayramakrishnan
- · Replies 5 ·
Which Statement About Magnetic Fields and Moving Charges is Correct?
- Sgtsloth
- · Replies 9 ·
Satellite in circular orbit with friction
- reminiscent
- · Replies 12 ·
A Charged Conductive Plate with a Charged Plane
- Thio
- · Replies 17 ·
Double Slit Question with Thin Lens concept
- JohnGaltis
- · Replies 6 ·
Designing a bar magnet generator for 7.86 volts AC
- Will1818
- · Replies 4 ·
Kinetic energy of alpha particle in alpha decay
- Kara386
- · Replies 3 ·