Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
How Do You Solve Kinematics Problems Involving Quadratic Equations?
- Falinox
- · Replies 3 ·
Period of Pendulum When Moving Axis Closer to COM
- chewytess
- · Replies 1 ·
Induced Current Direction in a Moving Square Loop
- flyingpig
- · Replies 17 ·
Direction of Induced Current in a Small Loop Inside a Solenoid
- SaraF
- · Replies 4 ·
Ohms law question. Series and Parallel in same circuit.
- doublea500
- · Replies 1 ·
Two skater's momentum after collision
- teggenspiller
- · Replies 6 ·
Effective nuclear charge for outer electron of Lithium
- frozenguy
- · Replies 2 ·
I understanding the formula Power loss= I^2 R
- selishaphysic
- · Replies 8 ·
Simple Harmonic Motion of a 2kg particle
- chewytess
- · Replies 7 ·
What Could Be Wrong with My Wave Function Equation?
- lina29
- · Replies 2 ·
Help with physics project please
- kewlcat100
- · Replies 1 ·
Hydrogen emission spectrum diagram
- iym185
- · Replies 3 ·
Why do hailstones hurt more than raindrops when they hit you?
- planauts
- · Replies 9 ·
Solve Electricity Problems: Get Answers Now
- Aravsion
- · Replies 9 ·
Simple harmonic motion spring problem
- Dylan.Wallett
- · Replies 4 ·
How Does Doubling Frequency Affect R-L-C Series Circuit Components?
- meryom
- · Replies 8 ·
Rigorous proof about the nature of rolling motion
- quincyboy7
- · Replies 1 ·
Friction force for a rolling wheel?
- quincyboy7
- · Replies 2 ·
Wave Interference - Phase Difference
- planauts
- · Replies 2 ·
Understanding Carbon Decay: Solving for Decay Rate
- jimmy42
- · Replies 4 ·
Moment of force, stabilising a board carried over shoulder
- Rbraind
- · Replies 6 ·
Vector Notation: Struggling to Reconcile Directions
- quincyboy7
- · Replies 4 ·
What is the Force on a Current Loop in a Magnetic Field?
- james11223
- · Replies 8 ·
How Do I Calculate the Final Velocity of a Trolley?
- hutchiee
- · Replies 3 ·
Find the speed of the 2nd-order maxima on the screen
- burgerkin
- · Replies 1 ·
How Many Excess Electrons Does a Charged Sphere Have?
- ishterz
- · Replies 3 ·
How Tall is the Tree in the Plane Mirror Problem?
- CaneAA
- · Replies 3 ·
Bicycle Wheel; Gyroscopic Action
- LareeRudi
- · Replies 4 ·
How Does Friction Affect the Final Velocity of a Block on an Incline?
- dancing123
- · Replies 1 ·
Trouble with Log Laws and exponential functions
- pdas
- · Replies 10 ·
Work done by liquid's frictional viscosity
- imatreyu
- · Replies 4 ·
Volume Flow Rate, Velocity, Factors
- karmatic
- · Replies 1 ·
Physics Photo Contest: Refraction of Light
- seasaltsara4
- · Replies 6 ·
Radioactive Dating: Age of Ancient Rock Determined by Half-Life
- reree17
- · Replies 1 ·
Help with deriving this diffraction equation
- Emidy
- · Replies 1 ·
Induction stove-principle involved?
- logearav
- · Replies 1 ·
Deriving Big 5 Motion Laws Non-Calculus and Calculus
- quincyboy7
- · Replies 1 ·
Projectile Motion (Initial Velocity)
- Milkster18
- · Replies 33 ·
Direction of Electric Field vs. Electric Force
- Core2uu
- · Replies 2 ·
Calculating the Compression Distance in an Inelastic Collision with a Spring
- dancing123
- · Replies 4 ·
Average Power and speed of a car
- nagaromo
- · Replies 7 ·
Decays per second, finding mass
- ronpaulkid
- · Replies 1 ·
What Is the Initial Velocity of the Bullet?
- PreetiM
- · Replies 5 ·
How Do Key Swings Maintain a Circular Path?
- farhannaeem
- · Replies 3 ·
What is the Distance of Closest Approach Between Two Point Charges?
- purduegirl
- · Replies 5 ·
Velocity of a sinussodial function
- notsam
- · Replies 1 ·
Calculating the closest possible distance of approach
- rreedde
- · Replies 3 ·
Gravity on a Small Scale: Coyote vs Boulder Debate Explained
- sciencequest
- · Replies 8 ·
Projectile Motion of Apple Core from a Tree
- farhannaeem
- · Replies 1 ·
Bus Circular Motion: Calculating Minimum Friction for Laptop Stability
- farhannaeem
- · Replies 5 ·
Bending Wires and Magnetic Fields?
- albert1993
- · Replies 2 ·
Ammeter in a problem, calculating currents
- Femme_physics
- · Replies 4 ·
How Does Newton's 3rd Law Allow Movement Despite Opposing Forces?
- galiciadba
- · Replies 2 ·
Centripetal Force; calculating speed
- Macrowave
- · Replies 4 ·
What are the Values of x, y, z for Mechanical Energy to be Positive?
- SpY]
- · Replies 2 ·
The Motion of Charged Particle in Electric Fields Problem
- Freeq
- · Replies 2 ·
Juggler throws 2 balls - when do they pass
- Rbraind
- · Replies 2 ·
Why Does a Cake Tin Burn You Faster Than Air in a Hot Oven?
- danago
- · Replies 6 ·
How can I determine the initial velocity of a ball thrown towards a ceiling?
- ashlee.m
- · Replies 2 ·
How Is Work Calculated in a Vector Field?
- Duncan1382
- · Replies 2 ·
How Is Angular Velocity Affected by Torque in a Multi-Pulley System?
- Yapper
- · Replies 3 ·
Solving Ideal Gas Problems: ΔE, ΔS, W & P0V0
- tigers4
- · Replies 3 ·
Racing to the Finish: A Boy Paddles from Point 1 to Point 7
- physicdummy
- · Replies 3 ·
S.h.m Homework Help: Find Length, Velocity & Acceleration
- Mattmiles
- · Replies 4 ·
Calculating Amplitude of a Simple Pendulum
- Mattmiles
- · Replies 1 ·
How Do You Calculate a Battery's Voltage with Different Resistors?
- fran1942
- · Replies 3 ·
Torque to linear acceleration.
- Yapper
- · Replies 4 ·
Projectile Motion Velocity Question
- Procrastinate
- · Replies 3 ·
How Much Energy is Needed to Heat Air in a Movable Piston Cylinder to 755 K?
- lackos
- · Replies 1 ·
Thermal Expansion of brass rod
- lackos
- · Replies 1 ·
Specific Latent Heat of Vaporization vs Evaporation
- Peter G.
- · Replies 3 ·
Capacitance and max field strength of a concentric sphere capacitor
- Andzus
- · Replies 4 ·
Solving for Initial Velocity v with No Oscillation
- cloud360
- · Replies 38 ·
What is the Photoelectric Effect?
- pugtm
- · Replies 5 ·
Derive equation for voltage across a capacitor
- Fionn00
- · Replies 5 ·
Specific Heat Capacity Answer Wrong, yet no error to be found
- Gutter
- · Replies 11 ·
Heat Engine with Finite Heat Capacity- Is my answer correct?
- G01
- · Replies 3 ·
Calculating Work Done on a Crate on an Incline
- teggenspiller
- · Replies 6 ·
Acoustics and Frequency Question (easy)
- sobo22
- · Replies 3 ·
Question Polarization of Matter
- wared_wam
- · Replies 2 ·
Calculating Braking Torque for a Flywheel
- andycampbell1
- · Replies 2 ·
Double Slit Interference Pattern
- jmm5872
- · Replies 1 ·
A question about power, and photons
- cupcuppycup
- · Replies 1 ·
Projectile Motion Practice Questions and Solutions
- vivekfan
- · Replies 2 ·
Conceptual question: Newton's Laws
- mateomy
- · Replies 1 ·
How does Ampere's Law apply to a long thick slab on the z axis?
- Kvm90
- · Replies 2 ·
Electric Field Due to a Point Charge
- Wables
- · Replies 5 ·
Proving an Identity Involving Gamma Matrices
- Kalimaa23
- · Replies 3 ·
Water vs Steam Burns: Which is More Severe?
- pavadrin
- · Replies 4 ·
Mass wraps around rod in circular motion
- unscientific
- · Replies 3 ·
Connected Capacitors: Charge & Potential Diffrences
- andrewdavis23
- · Replies 1 ·
Solve Kinematics: Find Velocity & Displacement of Speedboat
- iaberrant
- · Replies 1 ·
What is the relationship between pressure and depth in a scuba diver's lungs?
- notsam
- · Replies 11 ·
How Do Support Posts Affect Equilibrium in a Planked System?
- Barkingwalrus
- · Replies 3 ·
Solving Vertical Circular Motion Homework Problems
- songoku
- · Replies 4 ·
Modern Physics - Length of infinite well that has an electron
- fallen186
- · Replies 1 ·
Basic Ramp Question: Is Force on Ramp & Pole Increased by √2?
- Samky
- · Replies 8 ·
Answer Fun Torque Problem with 1.9m
- jcais
- · Replies 5 ·
RMS speed of Hydrogen Atoms in space
- notsam
- · Replies 1 ·
Collision Problem - A gain of kinetic energy?
- eurekameh
- · Replies 3 ·