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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Mass-energy conservation in nuclear reactions
- voreryar
- · Replies 3 ·
Electric flux through a hemisphere due to these charge configurations
- gracy
- · Replies 51 ·
What does this expression involving Partial Derivatives mean?
- physicss
- · Replies 5 ·
Find unknown wind velocity given airlplane's speed
- Gardunf070
- · Replies 3 ·
Calculating torque about a point with given forces
- Nova_Chr0n0
- · Replies 5 ·
Finding intervals where oscillator x(t)=0.2cos(12πt) accelerates
- MatinSAR
- · Replies 5 ·
Finding position vectors in a mechanics problem
- flamebane
- · Replies 5 ·
Question on Time-Independent Perturbation Theory
- cwill53
- · Replies 3 ·
What does tolerance mean in air density and Bernoulli's equation problems?
- member 731016
- · Replies 4 ·
Newton's second law graph giving negative mass for hanging weight
- member 731016
- · Replies 44 ·
Magnetic field at origin due to infinite wires and semicircular turn
- PhysicsRock
- · Replies 3 ·
Circular Motion: Tangential and Normal Acceleration
- Heexit
- · Replies 5 ·
2D kinematics problem -- Skateboard ramp jump calculations
- weewooweee
- · Replies 4 ·
What is k in Newton's law of cooling with T(t) = 51°, TA = 19°, T₀ = 80°, t = 1200 s?
- sunmoonlight
- · Replies 15 ·
Graphing velocity, acceleration, and position
- banderson9
- · Replies 6 ·
Center of gravity of this body: y = (x^2)/a (rotated about the x-axis)
- Heexit
- · Replies 4 ·
What is the velocity vector of (rsin(phi), rcos(phi), 1) ?
- physicss
- · Replies 4 ·
Wheelie of a car coming out of a ditch: what is the correct model?
- alex33
- · Replies 125 ·
Why do 2 sig fig answers result from 1 sig fig inputs?
- member 731016
- · Replies 8 ·
Finding the gradient of 1/r
- physics12
- · Replies 8 ·
Water rocket acceleration model and escape velocity calculation
- Tanguy
- · Replies 14 ·
Why is the work done double its expected value? (conveyer belt)
- Aurelius120
- · Replies 58 ·
What Does d Represent in Interatomic Spacing Diagrams?
- Idan9988
- · Replies 5 ·
Vector is a function of its position or not?
- Ebby
- · Replies 16 ·
Calculation of Box's Acceleration on a Trailer with Friction
- Heexit
- · Replies 9 ·
What is the magnitude of the field at point R?
- paulimerci
- · Replies 5 ·
Potential difference between 2 points in a capacitor circuit
- vcsharp2003
- · Replies 30 ·
Work done pushing a spring from the side
- Ebby
- · Replies 9 ·
Find the magnitude of the electric field at point P
- paulimerci
- · Replies 5 ·
Find the magnitude of the electric force from 3 charges at vertices of a cube
- paulimerci
- · Replies 17 ·
Pressure at different heights in a U-tube with water and oil
- Lui4
- · Replies 26 ·
Forces for bodies connected by a wire on inclined surface
- Heexit
- · Replies 4 ·
Deriving force from momentum using d(mv)/dt
- Mohmmad Maaitah
- · Replies 6 ·
Efficiency and Temperature in Heat Engine Cycles: Approaching Parts B, C, and D
- singularcell
- · Replies 1 ·
Mixing two gases in an isolated system and calculating final p and T
- chocopanda
- · Replies 4 ·
Work energy KE theorem for a book being lifted up in a gravitional field
- member 731016
- · Replies 18 ·
How to find the equilibrium position of three masses (two of them fixed)?
- gnitsuk
- · Replies 4 ·
Can I treat a wrapping rope as a negative force in this statics equation?
- AzimD
- · Replies 9 ·
Distance as a function of time for two falling stones
- MatinSAR
- · Replies 9 ·
Projectile fired through slanting tunnel
- kuruman
- · Replies 6 ·
General form of Newton II -- Not understanding this step in the derivation
- member 731016
- · Replies 5 ·
Impulse integration for a Tennis Racket hitting a Tennis Ball
- member 731016
- · Replies 3 ·
Vector Math Problem (Boat crossing a River)
- zetlearn
- · Replies 8 ·
What research question can I explore for an IB extended essay on solar cells?
- Juan2g19
- · Replies 2 ·
Square of orthogonal matrix vanishes
- PhysicsRock
- · Replies 4 ·
Calculate Max Resistance for 2 Parallel Wires
- Lambda96
- · Replies 7 ·
Velocity-time graph from distance-time table
- Sh4dman
- · Replies 6 ·
Determine the voltage at each point with respect to ground
- Lay1
- · Replies 28 ·
Fluid flow rates in straight vs coiled tubes
- mahdis
- · Replies 19 ·
Calculating Velocity Components and Slope for a Falling Rock in a Tunnel
- dwinkley
- · Replies 21 ·
Problem about a block of ice melting (specific latent heat)
- RateOfReturn
- · Replies 1 ·
Solve First Year Harmonic Motion Problem: Cylinder Rolling
- Xiothus
- · Replies 5 ·
Why Capacitors in Parallels vs. Series: Coaxial Capacitor Case
- PhysicsRock
- · Replies 2 ·
How to show light from laser pointer is plane polarised?
- songoku
- · Replies 5 ·
Total Force on a Point Charge in Motion
- ARoyC
- · Replies 18 ·
Work done on a gas when it is compressed quasi-statically
- member 731016
- · Replies 20 ·
Why must we use absolute temperature for the Ideal Gas Law?
- member 731016
- · Replies 10 ·
Block and pulley on movable incline
- Aurelius120
- · Replies 2 ·
Capacitor 1/3 filled with a dielectric
- PhysicsRock
- · Replies 40 ·
Why does N need to be greater than 0 for a loop the loop?
- member 731016
- · Replies 8 ·
The Definition of Torque - a proof
- Shreya
- · Replies 6 ·
A Force Changing With Distance (bead moving on a curved wire)
- gkg
- · Replies 7 ·
Microscope magnification and image properties from objective and eyepiece
- member 731016
- · Replies 12 ·
Work done by a normal force (or rather, work NOT done)
- Ebby
- · Replies 57 ·
Pressure at bottom of three differently shaped cylinders
- member 731016
- · Replies 9 ·
Can I find a general solution to this circuit?
- Lotto
- · Replies 3 ·
Why is dam thickness independent of width in fluid mechanics?
- member 731016
- · Replies 9 ·
Find the coordinates of a point in 3-space
- CaliforniaRoll88
- · Replies 51 ·
Angular Velocity of a Large Pendulum on Earth as seen from the stars
- Asem
- · Replies 11 ·
My Solution Attempt: Visualized
- heisenbergs
- · Replies 2 ·
Find tension in ropes connecting 3 masses being pulled on a surface
- Mohmmad Maaitah
- · Replies 10 ·
Torque about an accelerating point
- xkcda
- · Replies 5 ·
Discharging a capacitor -- Calculate the current as a function of time
- Lambda96
- · Replies 3 ·
Multi-part question involving a vector field
- CaliforniaRoll88
- · Replies 32 ·
Kinetic Energy of a Cylinder Rolling Without Slipping
- uSee2
- · Replies 21 ·
D'Alembert's principle on inclined plane problem
- PhysicsRock
- · Replies 8 ·
Tension in a Massive Rotating Rope with an Object
- MichaelTam
- · Replies 39 ·
Work done by a force down a ramp
- nav888
- · Replies 11 ·
Solving a Problem: What Went Wrong & Velocity for Both Masses
- Mohmmad Maaitah
- · Replies 2 ·
Buckets on a pulley - Dynamics Problem
- Shreya
- · Replies 47 ·
Heat added to system increases mass
- member 731016
- · Replies 12 ·
Bernoulli equation for calculation of water flow
- gamecult
- · Replies 30 ·
Electric field amplitude question regarding intensity calculations
- MeatComet
- · Replies 4 ·
Polarities of capacitor plates in a complex circuit
- vcsharp2003
- · Replies 14 ·
The advisory speed for a car on a sloped bend
- Grizzly_1
- · Replies 11 ·
A diamagnetic sphere in a uniform magnetic field
- milkism
- · Replies 13 ·
Is absolute uncertainty the sum of systematic and random uncertainty?
- member 731016
- · Replies 3 ·
Conservation of Energy when lifting a box up off the floor
- nav888
- · Replies 5 ·
Does Depth Affect Buoyancy Force on a Spherical Object?
- member 731016
- · Replies 12 ·
Non-linear isotropic dielectric capacitor
- milkism
- · Replies 10 ·
Work done by gravity and the minus sign
- Mohmmad Maaitah
- · Replies 7 ·
Electron in a time variable magnetic field
- mahblah
- · Replies 5 ·
How does the calculation of work change for a rotating or non-rigid object?
- nav888
- · Replies 4 ·
Does the book have an error in the addition of these two vectors?
- CaliforniaRoll88
- · Replies 2 ·
Definition of a non-polar molecule
- vcsharp2003
- · Replies 7 ·
Density of a sphere that has a cavity
- MatinSAR
- · Replies 5 ·
AP Physics C Mechanics: Linear Momentum for Colliding Billiard Balls
- Daniel Guh
- · Replies 4 ·
Direction of movement and sign of the charged particle
- songoku
- · Replies 5 ·
Finding initial copper temperature with ice melting
- Bassa
- · Replies 7 ·
Calculating distance of Mars from the Sun based on two elongations
- danunicamp
- · Replies 2 ·