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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Resistors in Series (Ohm's Law)
- exitwound
- · Replies 14 ·
What is the density of the stone?
- Nguyenfa.t
- · Replies 2 ·
Pinhole Camera Question: Calculating Distance for 1-Inch Image of a 20 Ft Tree
- rdiprimio
- · Replies 5 ·
Phase difference of sound waves at different distances from two sources
- affans
- · Replies 1 ·
Why do wheels not topple over while rolling?
- RoyalCat
- · Replies 9 ·
Solving Circuit with Large Resistor and Inductor: Q = CV?
- bodensee9
- · Replies 2 ·
Frequency of receivers to receive each others transmission.
- mmcd051
- · Replies 2 ·
Spring mass system with 120 J initial potential energy
- laxboi33
- · Replies 3 ·
How Much Work is Done Moving a Charge in a Conducting Rod?
- heynkm1
- · Replies 3 ·
Calculating Tension in a String: Two Masses on a Horizontal Surface
- Michael89
- · Replies 2 ·
Solving a Frictionless Three-Block System: Find Acceleration, Forces
- bumblebeeliz
- · Replies 5 ·
Force on two masses with accelerations 3.0 and 1.0 m/s²
- bumblebeeliz
- · Replies 2 ·
Why can't transformers work with direct current?
- jeff1evesque
- · Replies 3 ·
How a current passes through a wire?
- Jia-Lun Wu
- · Replies 1 ·
Electrical resistivity methodology
- star87jin
- · Replies 3 ·
IB Extended Essay topics in Physics
- shadowfire1
- · Replies 7 ·
Physics Theories which have been found to be incomplete
- JKropetz
- · Replies 16 ·
Really easy distance/time problem I'm having a brain freeze on
- Paulo Serrano
- · Replies 6 ·
Force on a current carrying wire
- vorcil
- · Replies 9 ·
Estimating the Size of a 1-Ton Rock: Relating Density and Volume
- DSG3002
- · Replies 3 ·
How Do You Isolate TF in the Method of Mixtures Equation?
- Petrucciowns
- · Replies 17 ·
Vapor pressure of n-propanol at 50°C in a vacuum
- rngz
- · Replies 4 ·
Elecricity (Basic Circut Questions)
- Stripe
- · Replies 12 ·
Magnification of binoculars when viewed backwards
- frederickcan
- · Replies 2 ·
How does the right-handed rule apply to angular velocity?
- Mathlete314
- · Replies 4 ·
Magnetic field around spinning sphere
- ninjadrummer8
- · Replies 3 ·
Simple harmonic motion of a spring and ball
- dance_sg
- · Replies 1 ·
Force Question Using weight and acceleration
- rcruz101
- · Replies 1 ·
What is the charge on the capacitor?
- frederickcan
- · Replies 5 ·
Pendulum Frequency Calculation
- dance_sg
- · Replies 15 ·
Identifying a metal with specific heat capacity 200 J/kg·K
- karin88
- · Replies 2 ·
Pole Vaulting (This should be interesting)
- harrinj4
- · Replies 17 ·
Why Does Work Equal ∫ p dv in an Isothermal Process?
- intenzxboi
- · Replies 2 ·
How Does Galaxy Rotation Curve Influence Mass and Luminosity Calculations?
- FrankPlanck
- · Replies 16 ·
Calculating Current Through a Capacitor with a Constant Voltage Input
- circuitaki
- · Replies 7 ·
Basic kinematics : 1-Dimensional collision in mid-air
- Matty R
- · Replies 2 ·
Reason for Incorrect Algebraic Equation?
- HussanAli
- · Replies 2 ·
Should You Graph All Trials or the Average in a Planck's Constant Report?
- Procrastinate
- · Replies 1 ·
Lateral displacement of blue and red light in glass block
- Sarah K
- · Replies 6 ·
Required Precision for GPS Distance Measurement
- DSG3002
- · Replies 7 ·
How to find mass moment of inertia in a dynamics problem
- hachi_roku
- · Replies 8 ·
Why Most Appliances Require Alternating Current
- jeff1evesque
- · Replies 3 ·
Maximum Acelleration of a System of Masses
- liuquinlin
- · Replies 3 ·
What is the Work Required to Stack Books?
- newtophysics
- · Replies 14 ·
The measurement of current and voltage
- runfast220
- · Replies 13 ·
Find the ration of the centripetal accelaration
- jandominic145
- · Replies 39 ·
Entropy change for water heated at constant pressure
- <---
- · Replies 9 ·
Acceleration Equations for Unknown Masses
- dance_sg
- · Replies 14 ·
Finding Current and B Field given J(p) in Z Direction
- iontail
- · Replies 4 ·
Exoergic Nuclear Reaction: Calculating Mass-to-Energy Conversion Percentage
- NikkiNik
- · Replies 1 ·
Astronaut releasing apple - Find acceleration
- dance_sg
- · Replies 11 ·
Conductor shielding in electrostatics
- daudaudaudau
- · Replies 7 ·
Chargedistribution from a given potential
- eXorikos
- · Replies 7 ·
Bubble rising underwater. What is the time taken for it to reach the surface?
- Nanyang
- · Replies 5 ·
Internal Energy During Phase Changes
- Physics Fern
- · Replies 3 ·
Which string breaks when pulled in Walter Lewin's experiment
- skydiver
- · Replies 7 ·
Calculating electrons from current and lamp power from voltage
- exitwound
- · Replies 5 ·
Will a falling target be harder to hit than a stationary one?
- jontyjashan
- · Replies 8 ·
Calculating Initial Kinetic Energy for Alpha Particle Approaching Nickel Nucleus
- NikkiNik
- · Replies 2 ·
Magnetic Flux passing through loop
- uzair_ha91
- · Replies 1 ·
Force on 20cm wire carrying 10A at 40° to 0.3T field
- uzair_ha91
- · Replies 1 ·
How Does Payload Affect Aircraft Speed and Position in a Dive?
- craigbeevers
- · Replies 22 ·
Electron speed through 250 kV potential difference, classical vs relativistic
- NikkiNik
- · Replies 2 ·
Does Enterprise see the shuttle approach?
- NikkiNik
- · Replies 11 ·
Relativistic density of water in a cube moving at 0.791c
- NikkiNik
- · Replies 5 ·
Adding a mass on an oscillation causing a change in frequency
- kavipach
- · Replies 5 ·
Calculating Charge Using Coulomb's Law
- jaxtar
- · Replies 6 ·
Real and virtual photons via neutral pion decay
- padraux3
- · Replies 3 ·
Simple explanation of a series rlc circuit in a radio
- thetrice
- · Replies 2 ·
Internal resitance and electromotive force
- hysteria
- · Replies 2 ·
How does a skateboarder accelerate without pushing against the ground?
- Ginger Chen
- · Replies 2 ·
What Is the Universal Gravitation Constant in English to 7 Significant Figures?
- Machinehead73
- · Replies 13 ·
Solve Wave Optics Laser Homework: Find Slit Width w/ Helium-Neon Laser
- talaroue
- · Replies 11 ·
What is the spacing (in mm) between the slits?
- talaroue
- · Replies 13 ·
Mechanics - Rectilinear Motion
- aolse9
- · Replies 8 ·
Getting the tension(Static equilibirum)
- honestliar
- · Replies 1 ·
Distance for Nuclear Shockwave to Destroy a House
- vladimir69
- · Replies 2 ·
Potential Grav. Energy to Kine. Energy Problem
- iamtrojan3
- · Replies 2 ·
Soccer ball kicked at 60° reaches roof peak at 11.5m, find horizontal distance
- liuquinlin
- · Replies 2 ·
Radius of curvature for a magnetic field line
- catheee
- · Replies 1 ·
How Does Initial Velocity Affect SHM Equation for a Mass-Spring System?
- lol physics
- · Replies 11 ·
How Much Does the Spring Shorten When the Partridge is Removed?
- aozer
- · Replies 5 ·
A ball is thrown vertically upward
- bumblebeeliz
- · Replies 22 ·
Bullet passing through a wooden block, treating as inelastic collision
- ariana0923
- · Replies 2 ·
Finding Forces in Static Equilibrium
- honestliar
- · Replies 4 ·
How Much Power is Generated by a Turbine Rotating at 40 RPM?
- ourjungle
- · Replies 3 ·
Calculating Energy for Full Sphere of Radius R
- en.yokhai
- · Replies 3 ·
Finding Resistance of Ohmic Resistor with Voltmeter and Household Items
- DERRAN
- · Replies 2 ·
How can the potential energy and stored energy in a capacitor be different?
- exitwound
- · Replies 4 ·
Solving for Kcm in Particle Collision Problem
- AntiStrange
- · Replies 4 ·
Bernoulli's Equation and stream of water
- knightassassin
- · Replies 1 ·
Which formulas describe the magnetic field/field lines?
- ahxbshe1
- · Replies 1 ·
Electostatistics- non/conducting sphere/sheet in E field
- babyeintein
- · Replies 5 ·
Finding magnitude and direction of vector sums A+B+C, A+B-C, C-2A
- bumblebeeliz
- · Replies 4 ·
Finding Initial Velocity in Projectile Motion Problem
- MorganJ
- · Replies 1 ·
How Does Adding an Aluminum Calorimeter Affect Heat Transfer Calculations?
- ariana0923
- · Replies 1 ·
Solving Part A of "Theory 1" on IPhO-2000 Page
- RoyalCat
- · Replies 3 ·
Ring on vertical pole pulled by hanging mass through pulley
- Princesscindy
- · Replies 1 ·
Which method is more accurate for finding vector resultants?
- degsclarit
- · Replies 2 ·