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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Solving an Electric Circuit with Kirchhoff's Voltage Law
- pokgai
- · Replies 1 ·
MCAT contradiction? - Gauge Pressure
- berkeley12
- · Replies 4 ·
What is the surface area of the filament? heat expansion and transfer
- teggenspiller
- · Replies 12 ·
Finding the point where the net electric field is 0
- 012983
- · Replies 3 ·
Period of a simple harmonic oscillator
- spraymonkey32
- · Replies 1 ·
Circular/rotational motion problem - Waterwheel with bucket
- Oshada
- · Replies 13 ·
Dot product and cross product of vectors in Cartesian form
- 1barcafan
- · Replies 2 ·
Rotational kinematics of a ball
- medicle
- · Replies 1 ·
System of forces and torque on an object
- Rushers
- · Replies 6 ·
What is the mass of water used to cool the iron car engine?
- studenta
- · Replies 3 ·
Path Difference: Why a Cold Spot Forms at S
- Luke1121
- · Replies 1 ·
Question on Thermodynamics Problem
- D_Tr
- · Replies 2 ·
Color of oil slick with 250 nm thickness and refractive index 1.4
- MednataMiza
- · Replies 4 ·
Why Does P * V Not Always Equal 1 in Gas Laws?
- ProPM
- · Replies 8 ·
Elastic conservation, explosion.
- medicle
- · Replies 9 ·
Phase Transitions: Melting from Heat Transfer
- ProPM
- · Replies 2 ·
Find speed of wire with voltage, length, and magnetic field
- ettac
- · Replies 2 ·
Why does setting a different ground point change total voltage?
- Femme_physics
- · Replies 13 ·
Why do I use cos and sin for weight components on an incline?
- Peter G.
- · Replies 12 ·
Finding equivalent resistance and currents in a combination circuit
- timeforplanb
- · Replies 5 ·
Velocity of Plane Relative to Ground: Answer & Explanation
- wolves5
- · Replies 2 ·
Motor efficiency: why 1250W and not 1200W for starter current
- halcyondays
- · Replies 2 ·
What is the size of the image of a tree on a man's retina?
- anotherperson
- · Replies 5 ·
Determining Distance from Release Point Using Doppler Effect
- lackos
- · Replies 6 ·
How Fast is the Sun Losing Mass Due to Radiation?
- aeromat
- · Replies 1 ·
Special Relativity , firework question
- najisalem2009
- · Replies 5 ·
Spring constant and bungee jumping.
- anotherperson
- · Replies 1 ·
Finding refractive index and wavelength in glass from 632.8nm laser beam
- anotherperson
- · Replies 11 ·
How Does a Wave's Graph Change Over Time?
- anotherperson
- · Replies 2 ·
What is the perceived frequency of Bird B when it hears Bird A's screech?
- anotherperson
- · Replies 4 ·
Kinetics with Veloctiy/Acceleration Problem
- azn1x6flame
- · Replies 2 ·
Amplitude of a simple harmonic motion equation
- nehcrow
- · Replies 2 ·
Finding maximum power transfer to resistor R with dependent source
- DollarBill
- · Replies 3 ·
Neutron must travel so that kinetic energy = rest energy
- aeromat
- · Replies 2 ·
Atomic Ground State: What Is It?
- smscannell
- · Replies 1 ·
Circular Motion of a horizontal disc Problem
- Peter G.
- · Replies 4 ·
Entropy of a System: Answers Explained
- shally
- · Replies 4 ·
Why am I subtracting/adding normal force?
- gibson101
- · Replies 1 ·
Calculate Compression Stress for 500 kg Car Tire Ring
- Reema
- · Replies 1 ·
Formula to find maximum kinetic energy?
- Scippi
- · Replies 2 ·
Block on a frictionless, accelerating, inclined plane
- chronos98
- · Replies 27 ·
Difference between magnitude of T and its horizontal component
- Scippi
- · Replies 2 ·
Simple Fluids Problem: Cylinder on Oil with Added Weight
- BlueDevil14
- · Replies 5 ·
Find the Young's Modulus of a Wire
- Reema
- · Replies 2 ·
Sound Waves (simple harmonic motion and pressure dilemma)
- Apophilius
- · Replies 4 ·
Intensity and sound level of 1 kHz tuning fork at 1 m distance
- anotherperson
- · Replies 1 ·
Finding mass ratio of charged particles suspended at different angles
- peterpang1994
- · Replies 13 ·
Velocity Vectors in Circular Motion: Understanding Acceleration
- Peter G.
- · Replies 4 ·
Why Does the Stefan-Boltzmann Law Use Temperature to the Fourth Power?
- teggenspiller
- · Replies 1 ·
Calculating Force Required to Throw a 1kg Ball 4s in Air
- nessan
- · Replies 1 ·
Acceleration time graphs and velocity time graphs
- anotherperson
- · Replies 1 ·
Fireworks explosion: finding fragment speeds from energy distribution
- nehcrow
- · Replies 10 ·
A very difficult problem(hooke's law)
- DarkNess_wtc
- · Replies 13 ·
Ray Tracing and Lens Formula for Image Location
- anotherperson
- · Replies 7 ·
Spring Constants and compression
- anotherperson
- · Replies 3 ·
Solving 3D Statics Problem: Calculating Tension and Reactions
- Femme_physics
- · Replies 49 ·
Questions on Solution in Mechanics
- Trickster_00
- · Replies 1 ·
Finding Parametric Equations and Tangent Lines
- MozAngeles
- · Replies 3 ·
Question - Circular motion amusement park physics
- clintyip
- · Replies 18 ·
What projects does KVPY accept for next year's application?
- Rohin.T.Narayan
- · Replies 10 ·
Calculating Wave Properties: Frequency, Wavelength, and Speed
- anotherperson
- · Replies 3 ·
What is Torque and How Does it Relate to Uniform Circular Motion?
- anotherperson
- · Replies 2 ·
How do I solve circular motion problems with conservation of energy?
- steejk
- · Replies 11 ·
Coefficient of friction from a graph
- nehcrow
- · Replies 5 ·
Bricklayer problem (involves springs)
- lowellite
- · Replies 2 ·
Circular motion kid-on-a-swing problem
- Femme_physics
- · Replies 9 ·
Calculating Axial Stress in a Concrete-Encased Steel Column
- steve321
- · Replies 14 ·
Can a horizontal bar exhibit SHM with rotating wheels?
- cupid.callin
- · Replies 1 ·
Work to remove metal plate from capacitor at 100V
- Noirro
- · Replies 12 ·
How Fast Does a Hawk's Shadow Move When Diving?
- garcia1
- · Replies 3 ·
Magnus force and drag force equations for a ball
- pikula
- · Replies 1 ·
Why is tension in a rope constant despite increasing speed on a rough surface?
- phys_student1
- · Replies 2 ·
How do I rearrange this equation?
- mstephens88
- · Replies 15 ·
Constant speed and deaccelaration
- access
- · Replies 11 ·
What Are the Pressure and Speed of Water in a Fire Hose Tip?
- mm874
- · Replies 1 ·
What are h₁₀₀ and the critical density formula in cosmology?
- Badger01
- · Replies 3 ·
What defines oscillation in multiple choice questions?
- cupid.callin
- · Replies 3 ·
Free Fall Question (Non-solvable 2nd order equation)
- phys_student1
- · Replies 3 ·
Working out the coeffient of friction?
- mm874
- · Replies 3 ·
Why Does My Quadratic Equation Not Solve in This Momentum Problem?
- nehcrow
- · Replies 2 ·
Why is the initial push force 120 N, not 160 N?
- zorro
- · Replies 4 ·
How Do You Calculate Angular Speed and Velocity of Clock Hands?
- Kikki:)
- · Replies 10 ·
Box Sliding Down Frictionless Ramp: Vector Equations for Determining Force
- access
- · Replies 3 ·
Can I ignore the diverging lens when ray tracing the converging lens?
- sltungle
- · Replies 6 ·
Loop related to Circular motion
- Kikki:)
- · Replies 4 ·
Deriving Resonant Frequency of Multiple Mass Mass-Spring Systems
- verd
- · Replies 1 ·
Free body diagram equations for rubber band powered vehicle
- kroq
- · Replies 1 ·
Initial speed and max height of Geoff Capes' brick throw
- physicsgurl12
- · Replies 7 ·
Projectile launch angle when range is 7 times maximum height
- hechen
- · Replies 5 ·
Calculating Force and Mass on a Lawnmower: A Gardener's Guide
- anotherperson
- · Replies 4 ·
Calculating Arc Length on a Circle with Cartesian Coordinates
- Kikki:)
- · Replies 5 ·
The Induced Voltage in a Straight Wire with Time Varying Magnetic Field
- mikec2003
- · Replies 1 ·
Time for a softball pitch to reach the plate
- physicsgurl12
- · Replies 6 ·
Power to accelerate a 1600 kg SUV from 15.0 to 40.0 m/s in 4.0 s
- ajmCane22
- · Replies 3 ·
How High Was the Elevator When the Marble Was Dropped?
- John O' Meara
- · Replies 1 ·
Calculate Velocity of Dropped Rescue Raft
- physicsgurl12
- · Replies 8 ·
Projectile Motion: Solving for Range at Various Launch Angles
- ama
- · Replies 3 ·
Finding spring stretch when a 40g mass is lowered to equilibrium
- ajmCane22
- · Replies 6 ·
Angular Distance & Arc Distance: Homework Solution
- Kikki:)
- · Replies 2 ·