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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Coulomb's Law: Equality of Charges in Different Size Balls
- NotaPhysicsMan
- · Replies 2 ·
Energy to move 1070 kg object to altitude four times Earth's radius
- motionman04
- · Replies 12 ·
How Do You Calculate Wave Superposition for Different Frequencies and Phases?
- pulau_tiga
- · Replies 2 ·
Angular acceleration and torque
- Rave Grrl
- · Replies 2 ·
What is the mass of the ice cube?
- tobyguy
- · Replies 3 ·
How do we calculate the standard deviation of returns in a time step?
- courtrigrad
- · Replies 2 ·
Finding potential difference given work and kinetic energy
- leolaw
- · Replies 15 ·
Minimum height for a satellite to remain over the same geographical point
- F|234K
- · Replies 13 ·
Relativistic rocket speed in the first rocket's frame
- quasar987
- · Replies 5 ·
How to Inductively Prove a Recursive Sequence Formula?
- NuPowerbook
- · Replies 5 ·
What is cutoff wavelength in modern physics?
- phy
- · Replies 3 ·
Stochastic Differential Equations
- courtrigrad
- · Replies 10 ·
Calculating Geosynchronous Orbit around Jupiter's Moon
- twiztidmxcn
- · Replies 6 ·
What must unification theory explain about forces and past theories?
- whatzzupboy
- · Replies 6 ·
Force on Passenger in Car Crash: 602N
- Kp0684
- · Replies 5 ·
Calculating Plate Spacing for 162 V Parallel-Plate Capacitor
- Kawrae
- · Replies 4 ·
Electric Field and Force Components for Point Charges Q1 and Q2?
- formulajoe
- · Replies 10 ·
What is the explanation for Gauss's Law and the concept of electric flux?
- thisisfudd
- · Replies 4 ·
Calculating Electric Field of a Charged Particle at 1m Distance
- Soaring Crane
- · Replies 6 ·
Why Is My Calculation of Current in a 33 Ohm Resistor Incorrect?
- CartoonKid
- · Replies 7 ·
Progation of error in this formula
- thegame
- · Replies 10 ·
Coefficient of friction for car on banked curve at different speed
- F|234K
- · Replies 3 ·
How do I solve for y in the equation 3y^{\frac{2}{3}}=x?
- footprints
- · Replies 5 ·
How can I integrate e^-x sinx using parts?
- misogynisticfeminist
- · Replies 4 ·
What Are the Correct Formulas and Units for These Physics Equations?
- IKnowGravity
- · Replies 3 ·
Proving Prime Numbers Greater Than 5 are Sums of 3 Primes
- CollectiveRocker
- · Replies 12 ·
Electric potential at point above a uniformly charged finite rod
- sb_4000
- · Replies 2 ·
Electric permittivity of copper
- mike217
- · Replies 2 ·
Integral of 1 with respect to theta in trig substitution
- ProBasket
- · Replies 13 ·
Finding potential difference U_MN in a multi-resistor circuit
- maxpayne_lhp
- · Replies 7 ·
Why does x^n divided by the sum equal (x-1)/x?
- sebasalekhine7
- · Replies 5 ·
Why can't c1 and c2 satisfy y(0)=0, y'(0)=1 for xy''-y'=0?
- kdinser
- · Replies 2 ·
Boolean Simplification: Steps and Example for (A+B)(A+B)= X
- cact
- · Replies 2 ·
Understanding and Solving Inequalities Involving Square Roots and Fractions
- gillgill
- · Replies 6 ·
Why Does Mass Affect Acceleration on an Incline?
- Delonge87
- · Replies 12 ·
Checking flowcharts with decision points for haircut and letter writing
- jai6638
- · Replies 4 ·
Quick Math: Is tan(theta) + tan(theta) equal to tan(2theta)?
- ProBasket
- · Replies 4 ·
Calculating Force Between Two Dipoles With 10pC*m and 16pC*m
- vabamyyr
- · Replies 2 ·
Understanding Electrostatic Potential Energy Calculations
- chickens
- · Replies 9 ·
Calculating Charges of Two Small Nonconducting Spheres
- Soaring Crane
- · Replies 2 ·
Finding acceleration from two forces on a 14.1 kg block
- xelda
- · Replies 2 ·
Calculating Electric Field from a Long Straight Wire
- Soaring Crane
- · Replies 2 ·
What is the direction of the electric dipole moment?
- Soaring Crane
- · Replies 3 ·
Car's Trajectory on a Roller Coaster Track
- ProBasket
- · Replies 2 ·
What is the maximum speed on a dry road curve?
- shwoll
- · Replies 2 ·
Impact force of 1000 lbf object falling 32 feet
- minger
- · Replies 16 ·
Solving and Understanding a Tricky Differential Equation
- krusty the clown
- · Replies 17 ·
How Do You Calculate Displacement Around a Circular Lake?
- shawonna23
- · Replies 2 ·
Finding current and current density from drift speed in gold wire
- kyang002
- · Replies 2 ·
What Minimum Deceleration Ensures Legal Speed Over 116 Meters?
- shawonna23
- · Replies 2 ·
Energy of parallel plate capacitor problem
- meteorologist1
- · Replies 3 ·
What is the current density in the ion channel?
- kyang002
- · Replies 2 ·
Simple Harmonic/Spring Question
- Tom McCurdy
- · Replies 8 ·
Solving a Fluid Volume Physics Problem Using Archimedes' Principle
- Rachel C
- · Replies 8 ·
What Is an Example of a Nonintegrable Bounded Function?
- matrix_204
- · Replies 8 ·
When does a system of equations have a unique solution?
- uranium_235
- · Replies 11 ·
Set Up Help for Problem in 2.JPG | QuantumNinja
- Tom McCurdy
- · Replies 9 ·
How Does the Uncertainty Principle Relate to the Number of Waves in a Box?
- yizoink
- · Replies 2 ·
Electric Field Calculation for a Rotating Thread with Charge Density
- LostInSpace
- · Replies 2 ·
What about How to Prove Aut(G) is a Group?
- vsage
- · Replies 3 ·
Deriving energy formula from Rydberg constant equation
- scissors
- · Replies 5 ·
Ant on a Tightrope physics problem
- anaksunamoon
- · Replies 3 ·
Why Can't an Extremum Path in Lagrangian Mechanics Be a Local Maximum?
- meteorologist1
- · Replies 2 ·
Projecting onto a line in 3D space vs 2D projections
- merlinMan
- · Replies 2 ·
Calculating Electromagnetic Field Energy Flux in Linear Medium
- cepheid
- · Replies 4 ·
How Do You Calculate the Circumcircle Radius with Given Triangle Sides?
- primarygun
- · Replies 9 ·
Deriving the identity sin(2x) = 2sin(x)cos(x)
- jKotha
- · Replies 17 ·
Floating Cork Ball - Charge Calculation
- Bailey
- · Replies 2 ·
Solving Particle Mechanics Equation: V(x)=-A|x|^(n)
- Cognizant
- · Replies 2 ·
Where can I find advanced math and physics lectures on DVD?
- RadiationX
- · Replies 2 ·
How do I solve a^2 + b^2 = c^2 for the variables?
- VietDao29
- · Replies 9 ·
How Should I Handle Significant Figures When Calculating Solar Velocity?
- tony873004
- · Replies 9 ·
Kinematic Problem: How Long to Reach Half Speed in a Fluid?
- bjon-07
- · Replies 4 ·
Find Critical Numbers of g(x) and f(x) Functions
- Skomatth
- · Replies 4 ·
Finding Values for Mean Value Theorem in Integrals
- vee123
- · Replies 2 ·
How Does Friction Affect the Motion of a Spring-Attached Block?
- Tycho
- · Replies 2 ·
First and Second Law of Thermodynamics
- Soaring Crane
- · Replies 3 ·
Two-slit interference: how many maxima can be observed?
- matpo39
- · Replies 2 ·
Will the Tow Cable Hold During the Car Tow?
- bignasty
- · Replies 3 ·
What is the significance of the Windshield Wiper function in calculus?
- matrix_204
- · Replies 3 ·
Finding the Value of m and k to Reach an Average of 7.3
- preet
- · Replies 16 ·
How Does Magnetic Force Affect an Ion Moving Along the Line x=y?
- triplezero24
- · Replies 5 ·
How Long Does It Take for a 3 Gram Mass to Reach Maximum Height with Resistance?
- quick
- · Replies 2 ·
Momentum questions--need them done tonight
- manjuj
- · Replies 2 ·
Finding angular speed when clay hits rotating cylinder
- thenewbosco
- · Replies 4 ·
Finding position equation from differential equation for damped two-spring mass system
- stunner5000pt
- · Replies 12 ·
Force Experienced by an Electron in an Electric Field
- Soaring Crane
- · Replies 2 ·
Initial velocity in projectile motion
- maverick99
- · Replies 22 ·
Hamiltonian with explicit time dependence
- Asle
- · Replies 11 ·
How Do You Convert Weber Units to Tesla in SI?
- JamesJames
- · Replies 8 ·
Charge on capacitors, total energy
- kat_r
- · Replies 2 ·
Where to find research on math in physics, complex numbers, and science's impact
- properphysicist
- · Replies 2 ·
Proving m is 4k+3 when m² is 4k+3
- CollectiveRocker
- · Replies 26 ·
Cannon fired at 30° with initial speed 112.7 m/s: max height and range?
- Lyzriel
- · Replies 2 ·
Bohr model vs classical physics and quantized energy levels
- Omid
- · Replies 6 ·
Finding the position function for a ball thrown upward
- courtrigrad
- · Replies 3 ·
Shot Heard Around the World: Calculating Its Hypothetical Global Travel Time
- Teekie
- · Replies 2 ·
Why Must the Lagrangian's Mass Matrix Be Positive Definite?
- Inquisitive_Mind
- · Replies 4 ·