Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Does mechanical energy conserve in rocket propulsion without air resistance?
- Amith2006
- · Replies 5 ·
Electrostatic induction (can someone check my answer?)
- leena19
- · Replies 1 ·
How to Solve for Volume and Temperature in a Thermodynamic Problem?
- Nguyenfa.t
- · Replies 17 ·
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 ·