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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Why does ΣKQ^n become ΔQΣKnQ^(n-1)?
- foo9008
- · Replies 5 ·
Calculate the Average Surface Temperature of Earth
- lasisdabomb
- · Replies 7 ·
Surface charge density of conducting disc
- Titan97
- · Replies 1 ·
Optimal Right Ascension Values for Star Viewing at Different Latitudes
- Jimbob999
- · Replies 1 ·
Question on relative velocity -- Find time?
- navierstokes
- · Replies 18 ·
Distance between Isotopes in a mass spec
- Elvis 123456789
- · Replies 8 ·
What is the maximum charge on plates when dielectric removed
- akirez
- · Replies 7 ·
System of equations with acceleration and tension
- Bob Rudd
- · Replies 1 ·
Near Point Distance of 25cm, how far should object be?
- romeIAM
- · Replies 5 ·
Dynamics of a Box attached to a pully
- ciubba
- · Replies 3 ·
Work to pump water from a cylinder tank and fold an iron chain
- Biker
- · Replies 1 ·
What Does a Constant Velocity Graph Look Like?
- _Reza_
- · Replies 7 ·
Maximum work extractable from discharging two metal spheres
- Brennen berkley
- · Replies 8 ·
Finding the Density of a Floating Cube
- vinamas
- · Replies 8 ·
How do I choose the first f_try without given criteria for friction factor?
- foo9008
- · Replies 5 ·
Pushing a block up a slope--how far does it go?
- Eclair_de_XII
- · Replies 24 ·
Graphing data in a lab- astrophysics
- Emily R.
- · Replies 2 ·
Finding the center of buoyancy for a submerged object
- foo9008
- · Replies 13 ·
Calculating Work to Move a Charge in an Equilateral Triangle
- rgold
- · Replies 15 ·
What is the Force Acting on an Object Moving at a Constant Rate?
- Guessit
- · Replies 4 ·
Why does z1 equal z2 if position 2 is higher than position 1?
- foo9008
- · Replies 9 ·
Calculating Time Needed for Box to Stop Sliding Down Slope
- crom1
- · Replies 10 ·
An ideal gas going through a cycle
- Ethan Godden
- · Replies 1 ·
Solving Oneaxial Shear Test: Find Shear Force
- Zasha
- · Replies 1 ·
Downward Projectile Motion on an Inclined Plane
- dakota224
- · Replies 2 ·
Archived Gauss Law and the wrong Gaussian surface.
- Scherejg
- · Replies 1 ·
How Can I Ace My Physics Test on Newton's Laws and Gravitation?
- Ameer Bux
- · Replies 5 ·
Is Current I1 Constant in Mutual Inductance Systems?
- BlackMelon
- · Replies 1 ·
Calculating Induced EMF in a Circular Region with Decreasing Magnetic Field
- Titan97
- · Replies 18 ·
Meteor impact - Heat vaporization and capacity
- henrco
- · Replies 4 ·
Trajectory problem - launching from origin.
- Eclair_de_XII
- · Replies 19 ·
Minimum energy needed for a positrons to tunnel
- ElectricEel1
- · Replies 1 ·
Finding Polar Coordinates for Vector B⃗ = -2.0ι^ + 3.0 j^
- Flinze
- · Replies 13 ·
Why Do Different Semiconductors Exhibit Varied Transmittance Levels?
- says
- · Replies 5 ·
Backwards extension torque wrench formula + cheat sheet review
- leaning
- · Replies 6 ·
Can a car drive around a frictionless mountain?
- invariant99
- · Replies 6 ·
What is the minimum number of Polarizers needed
- ah011
- · Replies 3 ·
Electric potential at the center of a charged ring
- rgold
- · Replies 1 ·
Force of parallel plate capacitor
- rgold
- · Replies 5 ·
Force of Reducer on Fluid Flowing Right
- foo9008
- · Replies 1 ·
Why do light bulbs break? (burn out)
- Drizzy
- · Replies 8 ·
Thermodynamics First law ideal gas question
- deeko1987
- · Replies 3 ·
Electric Circuit using Kirchoff's rules
- Jakarto
- · Replies 3 ·
Power Loss, Current, Resistors, and Voltage
- Jakarto
- · Replies 4 ·
Finding spring compression when a mass is dropped on it
- reminiscent
- · Replies 20 ·
Charged mass hanging in electric field
- Mrencko
- · Replies 1 ·
Archived DC motor in series, finding the speed
- KESTRELx
- · Replies 2 ·
Inelastic collision of a cannonball
- reminiscent
- · Replies 4 ·
Moment of inertia of a rod at an angle to the axis
- mcheung4
- · Replies 2 ·
How Is Total Energy Calculated for Climbers in a Physics Problem?
- reminiscent
- · Replies 5 ·
Diffraction Understanding a solution
- Hebel
- · Replies 6 ·
What happens during a collision?
- Biker
- · Replies 3 ·
Planet distance from Earth with a 2-year orbital period
- wiegetz
- · Replies 16 ·
Finding Velocity and Force of a projectile
- Mr Timn
- · Replies 19 ·
Shear Stress Formula: Calculating Tau Correctly
- foo9008
- · Replies 1 ·
Why Is There a Negative Sign in the Modal Impedance of TEn Mode?
- Brianrofl
- · Replies 1 ·
Complex Impedance of a voltage source and 2 resistors
- Potatochip911
- · Replies 5 ·
Is Zero Acceleration Indicative of Zero Speed?
- robothito
- · Replies 1 ·
Particle potential energy - acceleration?
- reminiscent
- · Replies 6 ·
Rank Resistors by Energy Dissipation: 5Ω > 10Ω > 20Ω > 90Ω
- mattbeatlefreak
- · Replies 4 ·
Physics: Blocks on inclines connected by pulley problem
- Jamest39
- · Replies 2 ·
What Direction Does the Electric Field Point in This Scenario?
- hmaier
- · Replies 7 ·
Height and freefalling question
- Gustavs1337
- · Replies 18 ·
Finding Force from Potential Energy Function
- muhammed_oli
- · Replies 5 ·
Help choosing investigation topics for science and physics assignments
- Nicky Hollyoake
- · Replies 6 ·
Why does my phase change calculation give 300°C for ice-steam mixture?
- Elena14
- · Replies 9 ·
Find tension force on 2 boxes on a ramp
- Johnson1704
- · Replies 5 ·
How to find the time for a ball with (v_i=/=0) to drop?
- Eclair_de_XII
- · Replies 12 ·
Coefficient of static friction between load and incline
- 0curcuit0
- · Replies 2 ·
When Does a Package Slide on a Rotating Merry-Go-Round?
- Jamest39
- · Replies 27 ·
How Do Compression Distances Affect Spring Work Calculations?
- ecoo
- · Replies 1 ·
What is the Potential Difference in a Non-Uniform Electric Field?
- PhysicsInNJ
- · Replies 3 ·
How Do You Calculate Linewidth from Quality Factor for Light Emission?
- Aidden
- · Replies 5 ·
Increase in Charge on a Parallel Plate Capacitor
- Drakkith
- · Replies 3 ·
Electric immersion water heater time
- rgold
- · Replies 4 ·
What is the direction of the resulting force on this current
- elitechic26
- · Replies 1 ·
How Much CO2 Can You Save by Switching Light Bulbs in Canada?
- theone
- · Replies 9 ·
What is restoring force at the bottom of a bungee jump?
- jakeginobi
- · Replies 1 ·
Conceptual Question on Rotational Mechanics
- master_333
- · Replies 4 ·
Finding values for an RLC circuit graphically
- Potatochip911
- · Replies 24 ·
How to graph Fc=mv^2/r so that the gradient = velocity
- lachtal9
- · Replies 5 ·
Determining Launch Velocity to Overcome Drag (no propulsion)
- TimNJ
- · Replies 6 ·
Archived Why Do We Convert Grams to Kilograms When Calculating RMS Speed in Gases?
- ChopChop
- · Replies 1 ·
Calculate photon flux at a distance from the source
- Munir M
- · Replies 10 ·
Calculating voltmeter resistance in DC circuit
- ztalira
- · Replies 4 ·
Choosing Reference Points in Bernoulli's Equation for Fluid Flow
- Alettix
- · Replies 2 ·
Non-Ideal Battery Voltage with few data points
- FireZealot
- · Replies 2 ·
Electrostatic, Electric Field,Electrostatic potential energy
- blee22
- · Replies 1 ·
Work/Conservation of Mechanical Energy
- oceanscreams
- · Replies 2 ·
Archived What angle maximizes the horizontal distance of a rocket launch?
- RobertL
- · Replies 1 ·
What Is the Minimum Diameter for a Pipe Serving 360 Apartments to Prevent Leaks?
- vinamas
- · Replies 9 ·
How Do You Calculate the Other Student's Force on a Trunk in Physics?
- Balsam
- · Replies 3 ·
Helium ion: force between protons and electron potential energy
- Physics Dad
- · Replies 4 ·
How to Calculate the Correct Percentage Uncertainty in Metal Pipe Volume?
- harvey1999
- · Replies 7 ·
What is the formula for a magnetic field due to a finite wire with current?
- meaghan
- · Replies 1 ·
The value of g above and below the earth
- takando12
- · Replies 3 ·
Normal force on Brian in accelerating elevator and jet acceleration problem
- physics007jazer
- · Replies 3 ·
Direction of Frictional Force in Relation to Net Non-Friction Forces
- Balsam
- · Replies 9 ·
Problem with choosing which axis should be positive or negat
- Frankenstein19
- · Replies 4 ·
Why is the stopping acceleration positive when a car brakes to a stop?
- Frankenstein19
- · Replies 3 ·