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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Newton's law of cooling for a cylinder
- fayled
- · Replies 17 ·
Space Part 1 -- Why does NASA launch spacecraft toward the East?
- Ignis Radiis
- · Replies 21 ·
Work done by product gas in reversible adiabatic expansion
- Egbert
- · Replies 6 ·
Current through Point or Cross Sectional Area
- Prof. 27
- · Replies 2 ·
Net Electric Field Between Two Point Charges
- Rachelbot12
- · Replies 1 ·
Does Increasing the Area of a Loop in a Magnetic Field Induce Current?
- arpon
- · Replies 5 ·
Energy dissipated in 3-cars collision
- geoffrey159
- · Replies 6 ·
Finding uncertainty in acceleration from velocity and time measurements
- CKaiL
- · Replies 17 ·
How to Determine the Height of an Object Dropped at a Given Speed?
- NumberNumber
- · Replies 1 ·
Finding uncertainty for index of refraction
- bubothedog
- · Replies 7 ·
A few conceptual momentum questions
- SkyrimKhajiit
- · Replies 15 ·
Electric potential on concentric spheres
- carllacan
- · Replies 8 ·
Cylinder Equilibrium (2012 F = ma #12)
- Jzhang27143
- · Replies 6 ·
Netforce of spring, hookes law. help
- jim gerth
- · Replies 3 ·
Calculate acceleration of a ship fired from a cannon
- hgducharme
- · Replies 7 ·
Solving Heat Energy Dissipation for a Falling Magnet
- carpelumen
- · Replies 5 ·
Physics Gravity Problem and Kinetic Friction
- yomo710
- · Replies 11 ·
How Do You Calculate the Angle of an Emerging Light Beam in Refractive Layers?
- premed_love
- · Replies 1 ·
[Uni Physics w/ calc] Boat crossing a river
- jonathanlv7
- · Replies 22 ·
Kinematics problem -- A lift ascends from rest with uniform acceleration
- D.Man Hazarika
- · Replies 5 ·
Two charges, Electrical Potential
- rlc
- · Replies 11 ·
The time average potential of neutral hydrogen atom
- NewtonApple
- · Replies 2 ·
[Intro QM] A bit confused on spin of system notation
- Coffee_
- · Replies 1 ·
Physics in vertical jump and basball hit
- Michael12438
- · Replies 4 ·
Finding average horizontal force?
- IDespisePhysics
- · Replies 13 ·
Jumping on a Spring-Like Trampoline problem
- KKazaniecki
- · Replies 5 ·
Gas undergoing isothermic compression
- Karol
- · Replies 49 ·
LASER Operating At A Certain Frequency
- Paradox101
- · Replies 6 ·
Density of Liquid: 1667.7kg/m^3 | Solving Buoyancy Q.
- erisedk
- · Replies 8 ·
How Much Velocity is Needed at Point A to Leave the Track at Point B?
- terryds
- · Replies 7 ·
Person walking on the circumference of a disc
- Nathanael
- · Replies 11 ·
Working With 1D Constant Acceleration Kinematics
- Entangled Cat
- · Replies 1 ·
Acceleration of a Falling Bowling Ball: Effects of Rope Cutting
- Poetria
- · Replies 9 ·
Use molar mass of D2O to calculate the density of heavywater
- Cory522
- · Replies 4 ·
Torque Plus Power In Relation to Velocity
- postfan
- · Replies 15 ·
DISPLACEMENT-TIME graphs question
- Rasofia
- · Replies 1 ·
Pointlike charge - electric potential
- hannaps
- · Replies 1 ·
Fluid Mechanics: Cone-Plate viscometer
- Feodalherren
- · Replies 6 ·
Resultant Vector Homework: Min Value of |A+B+C|
- erisedk
- · Replies 2 ·
Newton's Third Law of Motion - Help
- yomo710
- · Replies 5 ·
Why does Asin(kx)sin(wt) represent a standing wave?
- erisedk
- · Replies 6 ·
Gravity force between Earth and Moon from this angle
- Barooo50
- · Replies 2 ·
Find velocity of a cart using a spring at an angle
- PhilEWCC
- · Replies 5 ·
Why is my answer wrong? Projectile Motion
- reyrey389
- · Replies 3 ·
How High Does a Small Ball Rise After Colliding with a Superball?
- geoffrey159
- · Replies 2 ·
Electric Field at Center of Square: Mag & Dir
- rlc
- · Replies 29 ·
Speed of satellite orbiting around the Earth
- bijou1
- · Replies 7 ·
Finding velocity (having trouble interpreting the question
- zx636r
- · Replies 2 ·
The relative resistance of a filament vs. a conductor
- erandall
- · Replies 9 ·
How long does an electron need to absorb energy
- crocodillo555
- · Replies 2 ·
What is the acceleration of a thrown ball relative to the ground?
- terryds
- · Replies 7 ·
Calculate Intensity of Sound Waves at 3.0 m from Source
- capudang
- · Replies 1 ·
Relation between energy annd pressure
- Haseeb Ali
- · Replies 3 ·
Finding terminal voltage without voltmeter
- learnings_sweet
- · Replies 6 ·
Electric field and potential of a charged disc
- carllacan
- · Replies 17 ·
Find an expression for the electric field(Mastering Physics)
- Eric Fossum
- · Replies 1 ·
Physics question from my test, having a hard time solving it (Lorentz Force)
- SevenSeeds5
- · Replies 7 ·
Period and Tension of a Pendulum
- postfan
- · Replies 11 ·
Application of the properties of light
- Paige
- · Replies 5 ·
Why averaging speeds directly gives wrong average speed
- Rasofia
- · Replies 11 ·
Kirchoff's Laws for Currents in a Circuit
- mriney
- · Replies 1 ·
Kirchoff's Laws Current [Problem 1]
- mriney
- · Replies 1 ·
Friction & Forces - Calculate Force on Wheaties Box
- thegoosegirl42
- · Replies 6 ·
Finding incorrect statement about time of flight for projectile reaching distance l
- postfan
- · Replies 13 ·
Three charges located on a straight line
- yzphysics
- · Replies 7 ·
Frictional force for bank curves
- theofficialack
- · Replies 9 ·
Finding where a light ray hits a vertical mirror using the law of reflection
- PhysicsMan999
- · Replies 12 ·
How to Keep a Sign from Collapsing
- postfan
- · Replies 28 ·
Calculate kinetic energy transferred
- Nicaragua
- · Replies 36 ·
Calculating the Angle of a Stable Ball on a Charged Plane
- Kaylee
- · Replies 10 ·
Experiment to find Plank's Constant
- Jimmy87
- · Replies 4 ·
Finding the ratio of masses for a pole and box system in equilibrium
- CH Lee
- · Replies 5 ·
What really is a Pascal and a Joule?
- Paul J
- · Replies 3 ·
Escape velocity and kinetic theory
- Suraj M
- · Replies 13 ·
Coulomb's Law, Charges and Acceleration
- julianwitkowski
- · Replies 8 ·
Converting parametric to cartesian
- Calpalned
- · Replies 4 ·
Circular Motion: Find Speed at Point A
- Bryan Tran
- · Replies 4 ·
Effective Resistance in Circuit
- andyrk
- · Replies 21 ·
Why is charge quantized and unable to exist in fractional or decimal values?
- logearav
- · Replies 1 ·
Velocity function, unit vector notation, acceleration, speed
- ColtonCM
- · Replies 2 ·
How Does Friction Affect a Puck Sliding Up an Inclined Plane?
- pizza_dude
- · Replies 6 ·
Calculating Acceleration of a Car After Braking
- IDespisePhysics
- · Replies 4 ·
Projectile question with no time or velocity or range
- Ariesspear
- · Replies 14 ·
Natural Oscillation Frequencies
- Charles Stark
- · Replies 1 ·
Why do I get 0.5 cm for wavelength when the book says 1 cm?
- EgpYo
- · Replies 14 ·
Why Can't Conservation of Energy Be Used to Solve the Loop Problem in Physics?
- squirrelschaser
- · Replies 3 ·
Flow Rate in Horizontal Rectangular Channel: Solve Now
- Ragnar1995
- · Replies 2 ·
Power developed by a jumping man
- geoffrey159
- · Replies 8 ·
Rods with Masses orbiting Earth
- postfan
- · Replies 26 ·
Three Point Charges, Find x-component
- rlc
- · Replies 2 ·
What is the recoil velocity of a carbon atom in pair production?
- Paradox101
- · Replies 5 ·
What is the maximum load the concrete can support?
- Dennydont
- · Replies 4 ·
Calculating Total Power Output of a Speaker at a Given Distance
- FunkyFrap
- · Replies 4 ·
How to Calculate the Force Holding Two Halves of a Charged Sphere?
- arpon
- · Replies 1 ·
Calculating Net Gravitational Force in Equilateral Triangle Configuration
- QuantumKnight
- · Replies 5 ·
Why must a water skier at constant velocity lean back?
- Lola Luck
- · Replies 13 ·
Relative position and velocity question (Two dimensions)
- kappakeepo
- · Replies 4 ·
Calculating pressure in high altitude?
- dmk90
- · Replies 6 ·
What is the Acceleration of a Spherical Shell Filled with Fluid on an Incline?
- postfan
- · Replies 42 ·
Center of Mass Velocity in Elastic Collision
- postfan
- · Replies 9 ·