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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Centripetal acceleration/ motion question
- chudzoik
- · Replies 7 ·
Finding momentum, friction, and forces
- vaironl
- · Replies 2 ·
Hydrogen Atom Energy: Ratio of νBohr/νorbit
- v_pino
- · Replies 10 ·
Find the Current at a Certain Point
- Hypnos_16
- · Replies 2 ·
Testing Faults in Circuits w/ Continuity Testers & Light/Battery
- Kyleee
- · Replies 8 ·
Calculating Velocity After Collision of Two Cars
- jmoser
- · Replies 4 ·
What size of current will be drawn from the battery pack
- Kyleee
- · Replies 3 ·
Charges, Electric Fields, and Work?
- ObviousManiac
- · Replies 2 ·
Finding Joules of heat for 75% efficient motor at 250hp.
- Moose100
- · Replies 4 ·
Gravitational Pot. Engergy & Electrical Pot Energy
- Apples~
- · Replies 2 ·
Can You Jump in a Free Falling Elevator?
- vruls
- · Replies 8 ·
Curve fitting of a damped harmonic oscillator
- Liquidxlax
- · Replies 1 ·
Classical Mechanics: Simple harmonic oscillator problem
- JordanGo
- · Replies 3 ·
Static equilibrium for three point charges
- DeIdeal
- · Replies 1 ·
Electric Field of Three Point Charges
- crybllrd
- · Replies 1 ·
Find potential difference of negative charged particle?
- gibson101
- · Replies 2 ·
Car impact at 90 degrees to each other (conservation of momentum)
- KESTRELx
- · Replies 3 ·
Dimensional analysis (Speed of sound)
- Firben
- · Replies 4 ·
Youngs Modulus of copper wire experiment
- jokiemay
- · Replies 11 ·
Simple harmonic motion: time for maximum speed
- Color_of_Cyan
- · Replies 12 ·
Circumference C of a circle of radius R inscribed on a sphere
- rbwang1225
- · Replies 1 ·
How Is Electric Field Calculated for a Uniformly Charged Cylinder?
- i4nb63
- · Replies 3 ·
Circular motion - banked angle?
- paperdoll
- · Replies 11 ·
How Does the Meteoroid's Acceleration Change as It Passes Planet Conniption?
- TheSerpent
- · Replies 8 ·
Energy - Finding Spring Constant
- njanek
- · Replies 1 ·
Double Slit Wave Interference Question
- chudzoik
- · Replies 1 ·
Relativistic mass and work problem
- Liquidxlax
- · Replies 2 ·
Vector Solutions to Math Problem: 27V + 8<b>i</b> + 5<b>j</b>
- pyroknife
- · Replies 3 ·
Metronome question: Figuring out net torque and expression for beats per minute?
- nukeman
- · Replies 4 ·
Electric Field & Flux, A loop & Charge
- SMA777
- · Replies 2 ·
Grade 12 Gravitational Force Fields Questions.
- TheSerpent
- · Replies 12 ·
Why do objects thrown from a cliff hit the ground at the same speed?
- samona
- · Replies 5 ·
Coulombs Law - Finding Force When Altering Distance
- jemjabella42
- · Replies 8 ·
Sound Intensity Level and Hearing Problem
- Dr. S
- · Replies 4 ·
2D Momentum of automobile collision Problem
- xChee
- · Replies 2 ·
Find the electric field produced by two rods
- kasparov5
- · Replies 13 ·
Show that in this fusion cycle, the energy released is about 30 MeV.
- bsmm11
- · Replies 1 ·
Simple Harmonic Motion/Energy: Damped Oscillations and Energy Dissipation
- omgitsrichie
- · Replies 1 ·
Find charge given current and time?
- ObviousManiac
- · Replies 2 ·
Coulomb's Law - Electric Force Between Two Copper Coins
- prosteve037
- · Replies 7 ·
Calculating Aerodynamic Power for Flying a Plane
- NegDee
- · Replies 1 ·
Electric Fields and Potential Difference. Combining Formulae
- Yer Madder
- · Replies 1 ·
Please help me identify this equation and the theory
- smashbrohamme
- · Replies 1 ·
Accerleration from power, mass & speed
- KESTRELx
- · Replies 1 ·
Buoyancy & Weight: Does Ice Float?
- fohstick
- · Replies 5 ·
How do I determine the current amplitude and phase angle in an RLC AC circuit?
- kate12
- · Replies 7 ·
Batteries connected in parallel and resistance
- Oerg
- · Replies 10 ·
Radiator radiation. Which way to place clothes horse for the fastest drying?
- gwood311
- · Replies 3 ·
When will the skier come to a stop?
- aksarb
- · Replies 17 ·
Solve Bernoulli's Equation for Pressure at Pump Entrance
- Femme_physics
- · Replies 9 ·
Is there something wrong with this basic mechanics question?
- Femme_physics
- · Replies 2 ·
Electric Field of a uniformly charged rod
- crybllrd
- · Replies 7 ·
How Many Electrons Are Needed to Accelerate Two Spheres at 25.0g?
- joseph5640
- · Replies 1 ·
This doesn't seem to be working? Relativity
- IntegrateMe
- · Replies 2 ·
How to Calculate Wavelength of a Water Wave with Given Speed and Cork Movement
- ChunkymonkeyI
- · Replies 1 ·
Prove thatd d/dt[ r · ( v × a ) ] = r · ( v × a ̇ )
- SAHM1500
- · Replies 1 ·
Solving Pressure Equilibrium Problem Involving Oil & Mercury
- PirateFan308
- · Replies 1 ·
Kinematics question concerning the direction of avg acceleration
- justrandom94
- · Replies 4 ·
Period of oscillation for a pendulum
- Johnahh
- · Replies 7 ·
Simple Harmonic Motion Problem - Need help Thanks
- nukeman
- · Replies 12 ·
How much does it cost to run 300 school buses for 22 days?
- samona
- · Replies 6 ·
Simple average question using sig figs within ± 0.0 of uncertainty?
- bobi
- · Replies 2 ·
Archimedes' principle with 2 liquids
- bulbasaur88
- · Replies 4 ·
Calculate net gravitational field on the moon, without knowing its mass?
- joey_oggie
- · Replies 5 ·
Checking a question involving impact/impulse forces
- emilypearson
- · Replies 4 ·
Time taken for fluid to start flowing
- springwave
- · Replies 3 ·
Kinematics Physics (Relating velocity/time graph to displacement/time)
- __Shadow04__
- · Replies 7 ·
Photoelectric effect experimental data current vs. intensity vs frequency
- Kosta Dean
- · Replies 16 ·
Clarification on an electric fields solution
- Allenman
- · Replies 3 ·
A pilot makes a series of loop-the-loops.
- mali200
- · Replies 1 ·
To find out mode of vibration of air in a resonating pipe
- opencircuit
- · Replies 6 ·
Who is most likely to be hit by lightning
- phosgene
- · Replies 8 ·
What Are Virtual Images and How Do They Work?
- zzoo4
- · Replies 1 ·
Coefficient of kinetic friction question
- Meco
- · Replies 12 ·
What Are the Final Velocities of Ball A and Ball B After Collision?
- Meco
- · Replies 3 ·
Find the energy stored in a spring at .05m and .10m
- davyvfr
- · Replies 1 ·
Understanding colors (Lights And Optics)
- zzoo4
- · Replies 3 ·
Cylinder over a platform; force on the platform
- dany-vai
- · Replies 6 ·
How do I calculate the angle between three-dimensional vectors?
- Antebellum
- · Replies 2 ·
How Do You Calculate the Net Coulombic Force on a Charge?
- deezy
- · Replies 1 ·
Calculating how many neutrinos passed through a body
- mattdespat
- · Replies 3 ·
What is the minimum time for light to travel through two mediums?
- Annes
- · Replies 1 ·
Calculating the Electric Potential at the Center of the Rectangle
- kraigandrews
- · Replies 5 ·
Net Force: Identifying and Summing Forces for 2D Surfaces at Angles
- ten2062
- · Replies 6 ·
De Broglie wavelenght as a function of an accelerating potential
- NWSurvive
- · Replies 7 ·
Photoelectric Effect and the conversion ofPlank's constant from V.S to J.S
- Hmpca
- · Replies 1 ·
Electric Potential Energy Question With two Similarly charged Objects
- HarleyM
- · Replies 18 ·
Electric Current: Positive/Negative Charge Movement in Conductor
- bb.minhtri
- · Replies 6 ·
How Does Sand Falling Impact Balance in Physics?
- johnconnor
- · Replies 3 ·
Why Won't a Space Probe with 3GMm/R Energy Escape Earth's Gravity?
- confused200
- · Replies 2 ·
Calculating Work Done in a Bench Press Rep
- macmade
- · Replies 9 ·
Two Charges - Electric Potential Question
- pierretong
- · Replies 1 ·
Solving for Distance of Pit: 2 Seconds & 332m/s
- andorei
- · Replies 6 ·
Relative molecular mass using unified mass unit
- jadoreux
- · Replies 3 ·
Thermodynamics Problem (HINT PLEASE)
- Teachme
- · Replies 4 ·
Electrostatics - Electron passing through charged plates
- fobbz
- · Replies 4 ·
Kinematic One-D Problem: Calculating Total Distance Run by Dog in Morning Run
- saac
- · Replies 11 ·
Writing Vector Equations for positions of toy cars in the form r=a+tb ?
- Dosirak
- · Replies 1 ·
Two Electrons and Distance Equation
- jfkline21
- · Replies 1 ·