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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Superposition of the sound waves from two speakers
- Elsi b
- · Replies 24 ·
Why momentum but not energy conservation for dropped block on SHM block
- Hamiltonian
- · Replies 17 ·
Relating potential difference and electric field
- tuyenb
- · Replies 1 ·
Why does parallel RLC current have a negative sign compared to series?
- hidemi
- · Replies 6 ·
Finding the normal force of a block under water, under pressure
- JoeyBob
- · Replies 10 ·
Angular velocity of a weighted rod left free to rotate around a pivot
- greg_rack
- · Replies 6 ·
Find maxima angle of two interfering waves
- joelkato1605
- · Replies 4 ·
Question on how much intensity of light has been scattered
- Nirmal Padwal
- · Replies 4 ·
How to find the length when trying to determine the shear
- sylent33
- · Replies 22 ·
How to solve this network of resistors for equivalent resistance?
- Harsharma17
- · Replies 4 ·
Free-body diagram of mechanical system
- PainterGuy
- · Replies 3 ·
What is the breakdown voltage for this two dielectric capacitor (BaTiO3,LPDE)?
- HelloCthulhu
- · Replies 8 ·
Pulley and Blocks: Is My Answer Correct?
- hquang001
- · Replies 2 ·
What is the Relationship Between Work and Temperature Change in Melting Ice?
- ayans2495
- · Replies 2 ·
Magnetic Flux: Why Does it Stay the Same?
- hidemi
- · Replies 2 ·
What is the magnitude of the induced EMF?
- hidemi
- · Replies 5 ·
Calculating the surface tension using the method of Lecomt de Nouy
- arhzz
- · Replies 5 ·
Maximum range on ground for an elevated cannon
- brotherbobby
- · Replies 21 ·
Understanding Voltage Distribution in AC Circuits
- phantomvommand
- · Replies 2 ·
Magnetic field at center of coaxial loops
- hidemi
- · Replies 4 ·
Managing stress during college
- funnymonkey92
- · Replies 10 ·
Find the eigenvalues of a 3x3 matrix
- happyparticle
- · Replies 8 ·
Total energy of a mass hanging on a spring
- arhzz
- · Replies 12 ·
How to start a difficult physics problem
- hidemi
- · Replies 8 ·
Free body diagram of pin support and cable
- whitejac
- · Replies 10 ·
Calculating Distance and Time for One-Dimensional Motion in Physics
- hquang001
- · Replies 10 ·
Why does a star 15 minutes behind the sun not appear at night?
- petha1
- · Replies 2 ·
Calculating initial temperature of iron block submerged into water
- ayans2495
- · Replies 12 ·
Point charges placed inside a charged sphere
- A13235378
- · Replies 29 ·
Calculate energy required to heat water using a steam coil
- sci0x
- · Replies 9 ·
Calculating the weight when faced with multiple accelerations
- arhzz
- · Replies 20 ·
Inductive Current Coupling Between Two Coils
- hidemi
- · Replies 2 ·
Calculating Mars mass from Phobos orbit and stellar cooling time
- petha1
- · Replies 6 ·
Calculate the amount of torque and power needed on an inclined plane
- babol2728
- · Replies 3 ·
Van der Graaff generator charge and potential with 30cm radius sphere
- AN630078
- · Replies 8 ·
Calculating Friction & Time for a Bullet Penetrating Rubber
- shin
- · Replies 2 ·
Capacitor Questions Charging and Discharging
- AN630078
- · Replies 4 ·
Why a 20 Ohm lightbulb won't light up in a closed circuit?
- cbeck
- · Replies 7 ·
How to Calculate Energy Stored in an Inductor?
- PhysicsTest
- · Replies 16 ·
Potential Drop Across 15-mH Inductor at t=0?
- Truman I
- · Replies 5 ·
Question concerning the mechanics of a magnet's attractive force
- BernardRio
- · Replies 3 ·
The potential difference/EMF in RL circuits
- hidemi
- · Replies 6 ·
Momentum Conservation: How to Reconcile a Negative Value?
- Shaye
- · Replies 5 ·
Accelerometer vs. Gyroscope - measuring torque
- HarryLime
- · Replies 7 ·
Calculating Theoretical Reaction Force of Ball Traveling in Semi-Circle
- TonyCross
- · Replies 43 ·
Energy transferred to nucleus in pair-production
- a1234
- · Replies 3 ·
Matrix formulation of an operator
- tanaygupta2000
- · Replies 34 ·
Solving for relativistic velocity using Newtonian physics
- gtguhoij
- · Replies 2 ·
Light beam reflection angle calculation
- Strange07
- · Replies 2 ·
Drawing Radial Field Equipotentials and Field Lines
- AN630078
- · Replies 3 ·
Instantaneous centers of a six bar linkage
- Andrew1235
- · Replies 2 ·
Expectation value of momentum operator
- tanaygupta2000
- · Replies 14 ·
Difference in tension introduced by friction
- Ithilrandir
- · Replies 8 ·
Vertical motion through an electric field
- Ibby321
- · Replies 1 ·
Finding the Oscillations of Pendulum A
- happyparticle
- · Replies 16 ·
What is the value of the load resistor?
- boxman
- · Replies 4 ·
Finding range and launch angle for projectile motion problems
- RandomStudentNotused
- · Replies 4 ·
Finding particle speed from Coulomb force and kinematics
- hidemi
- · Replies 13 ·
Group velocity dispersion on two pulses of different lengths
- StudentonaOdyssey
- · Replies 2 ·
Proper time in an acceleration frame
- LCSphysicist
- · Replies 2 ·
Power of black body radiation at 1.00 nm
- jjson775
- · Replies 15 ·
Heat transfer in thermodynamics
- Another
- · Replies 9 ·
Electric Field from a Charged Semicircular Rod
- ISAZI
- · Replies 2 ·
How do I find the maximum extension?
- Strange07
- · Replies 15 ·
Coupled oscillators -- period of normal modes
- happyparticle
- · Replies 11 ·
Find g, measured to be 9.78 at the equator, when Earth is still
- lpettigrew
- · Replies 17 ·
Normalize the Gaussian wave packet
- tanaygupta2000
- · Replies 29 ·
Minimum length x for no slipping
- Ithilrandir
- · Replies 13 ·
Graph of torque against displacement of galvanometer needle
- songoku
- · Replies 2 ·
Lorentz contraction and Spacetime diagram
- LCSphysicist
- · Replies 9 ·
Determine how many microstates and macrostates (Thermodynamics)
- learningastronomy
- · Replies 7 ·
Finding normal force on a crate with friction and applied force
- Jujubee37
- · Replies 22 ·
Equivalent resistance with multiple paths in four circuits
- Andrei0408
- · Replies 11 ·
What Is the Difference Between Tension Ratios of 3 and 9?
- Jujubee37
- · Replies 4 ·
What is the angle between the acceleration and velocity when rotating?
- bolzano95
- · Replies 13 ·
How does scintigraphy detect gamma photons from Iodine-131 disintegration?
- duchuy
- · Replies 7 ·
Why does the horse move forward if the cart pulls back equally?
- kasheee
- · Replies 4 ·
Find the distance x so that the two frictional forces are equal
- Ithilrandir
- · Replies 10 ·
Circular Motion Questions (energies, forces, angular velocities, etc.)
- lpettigrew
- · Replies 2 ·
A slab of glass dielectric is inserted into a parallel plate capacitor
- hidemi
- · Replies 4 ·
Where are the waves out of phase with each other by π radians?
- hidemi
- · Replies 14 ·
Elastic Collision and Momentum of Ice Skaters
- lpettigrew
- · Replies 16 ·
Altitude of Geostationary Orbit
- duchuy
- · Replies 5 ·
Calculating Average Power and Energy Consumption for a Heater
- PhysicsTest
- · Replies 10 ·
The symbol t in the capacitor discharge formula q= (q0e)^(–t/RC)
- hidemi
- · Replies 5 ·
Approximating the Edge of a Lens as a Prism
- Mr_Allod
- · Replies 3 ·
Coefficient of volumetric expansion of gasoline at different temperatures
- Doshke
- · Replies 5 ·
Mechanical system in one dimension
- TheDispStud
- · Replies 2 ·
Coaxial cable insulator resistance with doubled dimensions
- hidemi
- · Replies 7 ·
Finding angles with Bragg's Law
- baseballfan_ny
- · Replies 20 ·
Finding the final temperature of a mixture of ice and steam
- ayans2495
- · Replies 31 ·
What's the error in my solution (Freight car and hopper)
- yucheng
- · Replies 12 ·
Bernoulli Equation — Discharging water from a partially-filled sealed tank
- sci0x
- · Replies 6 ·
Charges, rod and magnetic field
- akhi999
- · Replies 5 ·
Magnetic field of a current loop
- MahalMuh
- · Replies 3 ·
Two rotating coaxial drums and sand transfering between them (Kleppner)
- yucheng
- · Replies 8 ·
Why is it important to check the magnitude of vectors when adding them?
- ryanking93
- · Replies 7 ·
Determining the uncertainity in Geiger Counter data
- learningastronomy
- · Replies 4 ·
Acceleration of objects connected by pulley on rough inclined plane
- songoku
- · Replies 5 ·
The mathematics behind airplane lift
- tania123
- · Replies 2 ·