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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Simple circuit - parallel resistors
- B4ssHunter
- · Replies 8 ·
Find electric field on a point due to a charged arc.
- cgar666
- · Replies 2 ·
What is the speed of the stone just before it hits the ocean?
- DocDot
- · Replies 2 ·
Truck decelerating from 40 to 20 m/s over 100 m
- dgsigala
- · Replies 1 ·
Two point charges 3 m apart, combined 20µC, repel with 0.075 N force
- dwn
- · Replies 3 ·
Calculate attractive force between Cu2+ and O2- ions.
- robertjordan
- · Replies 5 ·
Checking homogeneity of energy-momentum and current equations
- MisterOrange
- · Replies 3 ·
Finding the energy of an electron from n=4 to n=2?
- robertjordan
- · Replies 1 ·
Two Charged Masses Suspended From Strings
- Geromy
- · Replies 2 ·
Computing energy in the electron of Li 2+?
- robertjordan
- · Replies 1 ·
'Eyeballing' non-zero divergence and curl from vector field diagrams
- mindarson
- · Replies 6 ·
Shortest collision time that will leave engine block intact?
- kvkenyon
- · Replies 9 ·
Total distance and average speed for two-segment trip at 30 m/s and 10 m/s
- dgsigala
- · Replies 5 ·
Fraction of a distance (1D Kinematics)
- chatnay
- · Replies 1 ·
Final Temperature of Ideal Gas in Constant Pressure and Volume Compression
- chicagobears34
- · Replies 2 ·
Finding number of atoms per cm^3 of zinc?
- robertjordan
- · Replies 1 ·
Calculate flux through face of a cube
- mindarson
- · Replies 2 ·
Deriving a forumla for the gradient in cylindrical coordinates
- wifi
- · Replies 4 ·
Vector Components: Equal Force of Two Wires Suspending 500N Sign
- Coco12
- · Replies 2 ·
Vehicle to tow objects across 30ft fishing line
- PerfumeLover
- · Replies 1 ·
Will the passenger train collide with the freight train?
- lep11
- · Replies 17 ·
Vectors - Driving a car between time zones
- Coco12
- · Replies 3 ·
Calculating Internal Resistance of a Worn-Out Battery
- Sastronaut
- · Replies 10 ·
Can current through a resistor be negative and what does it mean?
- Sastronaut
- · Replies 7 ·
Circuit Problem with diodes and resistors with sine wave input
- GreenPrint
- · Replies 15 ·
Is \( x_0 \cos(\theta) \) Misinterpreted in Radial Coordinates?
- SlowProgress
- · Replies 4 ·
How Is Impulse Calculated in a Two-Cart Collision?
- dylanhouse
- · Replies 3 ·
Electric Field- Infinite Plane Charge Infinite Line Charge
- MostlyHarmless
- · Replies 2 ·
Tangential and centripetal acceleration for bike on curved hill
- kwenz21
- · Replies 3 ·
Charge On A Infinite Conductor Slab From An Infinite Sheet Of Charge
- Baumer8993
- · Replies 1 ·
Find V3 to Make I in 10Ω Resistor Zero
- Sastronaut
- · Replies 2 ·
One Dimentional Relative Motion
- shizaep
- · Replies 3 ·
Block sliding down ramp with friction after static limit exceeded
- Engineering101
- · Replies 4 ·
Theoretical Curve Graph vs Straight Line
- Richard Ros
- · Replies 1 ·
Gravitational force between two touching iron spheres
- PsychonautQQ
- · Replies 6 ·
Finding electric field of a bent uniform charged rod.
- freshcoast
- · Replies 10 ·
Tidal disruption of a star-planet system near a black hole
- bowlbase
- · Replies 6 ·
Finding R2 current using Kirchoff's loop rule
- Sastronaut
- · Replies 6 ·
Solving the Mystery of the Rock's Velocity
- Sylis
- · Replies 15 ·
How long does it take for the sun to produce 10,000 KWh on a 31,700 m² surface?
- Dassinia
- · Replies 7 ·
Resultant Velocity & Time for Crossing Stream: Vectors Comp. HW
- Coco12
- · Replies 3 ·
Component resolution of g on an inclined plane
- themselv
- · Replies 4 ·
Find the Wavelengths of Red and Blue Light in a Grating Spectrometer
- Gee Wiz
- · Replies 2 ·
Find the direction in which slope is the steepest
- wifi
- · Replies 11 ·
Resultant displacement of vectors
- Coco12
- · Replies 2 ·
Possible Rectangular Potential Barrier Transmission Problem
- member 422733
- · Replies 4 ·
Do images move faster than objects?
- Violagirl
- · Replies 2 ·
How Many Electrons Are Needed to Accelerate Two Charged Spheres at 25g?
- flynnk567
- · Replies 3 ·
Evaluating an exponential function that models a real-world situation
- Drakkith
- · Replies 4 ·
What happens to photons without enough energy in the photoelectric effect?
- kougou
- · Replies 1 ·
Finding v of a charged particle in a uniform magnetic field
- ThereIam
- · Replies 7 ·
A 10g mass suspended from a string is immersed into a liquid
- GreenTea09
- · Replies 1 ·
Magnetic moment of a solid, uniformly charged ball
- six7th
- · Replies 5 ·
Find acceleration from distance and time, with a twist
- qwertyertyuiop
- · Replies 1 ·
Why do we need to pick a very small A for curved surfaces in electrostatics?
- bowlbase
- · Replies 5 ·
Acceleration in Two Dimensions (Vector)
- trapones
- · Replies 1 ·
How do you solve the d(λmu) equation in relativistic energy?
- kbeach
- · Replies 1 ·
Breaking Bad Pizza Throw Physics Calculation.
- bala_phy
- · Replies 1 ·
What is the speed of the ball when it leaves Sarah's hand?
- Alcubierre
- · Replies 5 ·
Integral on the surface of a sphere - course notes
- Dassinia
- · Replies 23 ·
Why does Vbd equal VR2 if electrons lose potential energy going from d to b?
- Miike012
- · Replies 1 ·
Finding the Angle of Trajectory
- Lamebert
- · Replies 4 ·
What is the Index of Refraction in a Crystal Sphere Focusing Light?
- Aelo
- · Replies 12 ·
Electric force in an electric field.
- MostlyHarmless
- · Replies 6 ·
Determining charge of q and the spring coated with metal?
- Richard Ros
- · Replies 1 ·
Finding velocity of gas molecule
- Miike012
- · Replies 15 ·
Will submerged objects on a balanced lever stay in equilibrium?
- PsychonautQQ
- · Replies 3 ·
Find the magnitude and the direction of the electric field at the thir
- Richard Ros
- · Replies 4 ·
The ratio of the gravitational force between electron and proton
- Richard Ros
- · Replies 7 ·
Frictional talk - mass suspended from a flywheel
- brenfox
- · Replies 6 ·
Hooke's law and the Coulomb force
- Ampere
- · Replies 5 ·
Problem from physics teacher newsletter
- what2wham1
- · Replies 9 ·
How would one approach such problem?
- NasuSama
- · Replies 5 ·
Rayleigh scattering: finding wavelength for 2% of visible light intensity
- haitianstudent
- · Replies 4 ·
Why Is the Coefficient of Restitution Calculated as (Va - Vb)/(Vb - Va)?
- Gank
- · Replies 3 ·
Motion Problem with two moving masses
- Gank
- · Replies 25 ·
Solving one-dimensional Motion Problems
- Sylis
- · Replies 3 ·
How to find magnetic dipole force?
- PhizKid
- · Replies 1 ·
Does the Volume of Water in a Tube Affect Net Force on a Barrel?
- PsychonautQQ
- · Replies 8 ·
How Do You Determine the Angle β for Light Traveling Parallel Inside a Prism?
- haitianstudent
- · Replies 1 ·
Critically Damped Bathroom Scale
- jguilherme137
- · Replies 2 ·
How Does Lorentz Transformation Affect Muon Decay Observations?
- Steelangel
- · Replies 1 ·
What Determines the Direction of Potential Gradient?
- Yosty22
- · Replies 2 ·
Minimum velocity and angle to clear a 3m fence 6m away
- SammyLP250
- · Replies 16 ·
How Fast Must a Laser Move to Exceed Light Speed on the Moon's Surface?
- leroyjenkens
- · Replies 13 ·
BALL DROP EXPERIMENT: calculation of the magnitude of G
- Brittbrit22
- · Replies 1 ·
What is the magnitude of force vector?
- ozzolins
- · Replies 11 ·
What is the magnitude of Electric Field at r=R/2
- jaydnul
- · Replies 7 ·
How to make a mathematica code with vectors and magnitude
- Sneakatone
- · Replies 1 ·
Uniform line of charge and point charge
- noagname
- · Replies 5 ·
Calculating Momentum with Constant Force
- Alucard2487
- · Replies 6 ·
How Do You Calculate Velocity from a Graph with Two Points?
- butter231
- · Replies 2 ·
Calculating Horizontal Distance of a Proton in a Parallel-Plate Capacitor
- tuggler
- · Replies 16 ·
How Does Height Influence Torque in Static Equilibrium?
- member 392791
- · Replies 15 ·
Find the net electric field these charges produce
- yaro99
- · Replies 3 ·
What is the tension at point A below the x-z plane?
- member 392791
- · Replies 4 ·
Interpreting Velocity vs Time Graphs
- nsn7
- · Replies 6 ·
3D kinematics problem with horizontal range
- togame
- · Replies 2 ·
Finding acceleration magnitude from position vector at t = 2.00 s
- kpadgett
- · Replies 9 ·
Shooting Rifles from Platforms - Projectile question
- Niner1309
- · Replies 6 ·