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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Wave velocity on a piano wire gives 25.5 m/s
- ac7597
- · Replies 1 ·
Dropping a package with a parachute from a moving plane
- lawliet
- · Replies 13 ·
Further Applications of Newton's Law : Friction, Drag, and Elasticity
- EnricoHendro
- · Replies 3 ·
Is my solution for the Bungee Tension Problem correct?
- norcal36
- · Replies 5 ·
How to use Weibull distribution when it comes to wind?
- Kolika28
- · Replies 2 ·
Constant Acceleration -- Equation for Vavge
- Danger Mouse
- · Replies 5 ·
Best truss bridge design for this school project?
- Lietenacious
- · Replies 5 ·
F=ma experiment: Trolley being pulled by a falling weight
- coverband
- · Replies 2 ·
How can I increase the wavelength of light photons?
- dom489
- · Replies 4 ·
Fireworks Sound level at difference distances
- norcal36
- · Replies 1 ·
What Are the Normal and Shear Stresses on the Inclined Butt Weld?
- Zouatine
- · Replies 2 ·
How can I use the right hand rule to find torque in bicycle wheel rotation?
- ReCryptic
- · Replies 16 ·
Cylinder balancing in a single plane and in two planes
- crinoid
- · Replies 1 ·
Oscillations of a Block Mass attached to a Spring on an Incline
- lightlightsup
- · Replies 3 ·
Does someone understand this picture? (Solar heating)
- Kolika28
- · Replies 6 ·
Rocket moving through a cloud of dust, variable mass problem
- etotheipi
- · Replies 5 ·
How Long Does It Take a Dropped Bag to Fall from a Helicopter?
- eddddddd
- · Replies 13 ·
What Is the Internal Energy of an Electron Moving at 0.750c0?
- Barry Melby
- · Replies 2 ·
Relativistic motion of an electron in a uniform electric field
- Natchanon
- · Replies 1 ·
Using the Conservation of Energy to find the Radius of a Bowl
- Alexandra Fabiello
- · Replies 11 ·
Does magnetic field remain constant and what is its direction?
- Shacking
- · Replies 15 ·
Solving a Spring-Mass-Box System:Energy Conservation
- User1265
- · Replies 1 ·
Astrophysics databases — Where can I find them?
- SoulOfSword_
- · Replies 5 ·
Finding object density from tension in two strings with submersion
- norcal36
- · Replies 5 ·
How forces act on a shape and its centre of Mass
- tomtomtom1
- · Replies 13 ·
Why use v in a = v dv/ds if velocity is constantly changing
- Crystal037
- · Replies 9 ·
Energy change in a nuclear reaction
- songoku
- · Replies 10 ·
Electric current and resistance question
- Elisapan622
- · Replies 2 ·
Small error in calculating the value of g with an Atwood machine
- Ellio
- · Replies 3 ·
How do I predict a rocket's trajectory?
- Duncan LK
- · Replies 3 ·
Find the height to which a mass rises
- gnits
- · Replies 3 ·
Checking the Lorentz transformation
- QipshaqUli
- · Replies 2 ·
Hydrogen emission spectrum calculation
- benca
- · Replies 3 ·
How Do You Calculate the Tension of a Cello String?
- ac7597
- · Replies 1 ·
Force on side of tank filled with liquid of variable specific weight
- CheesyPeeps
- · Replies 5 ·
Friction coefficient and the force on a syringe plunger
- Huger
- · Replies 6 ·
Why energy conservation fails for bullet embedded in rotating rod
- isabelle3
- · Replies 10 ·
Moving a box on an inclined plane. Find F(min), angle and W(min)
- Michael_0039
- · Replies 1 ·
Projectile Motion : Work and Energy
- ReCryptic
- · Replies 4 ·
Electromagnetism EMF induction calculations
- imranh88
- · Replies 9 ·
Understanding Units of Force (Newtons and Pascals)
- tomtomtom1
- · Replies 4 ·
Is our reasoning about constant motion accurate?
- jedimath
- · Replies 8 ·
On-Axis Field of a Uniformly Magnetized Sphere
- Luke Tan
- · Replies 1 ·
How Does Energy Conservation Affect SHM in a Mass-Spring System?
- gnits
- · Replies 2 ·
Mechanical Advantage of a Compound Wedge
- goodboybaddog
- · Replies 18 ·
Voltage and current as functions of time for a series RL circuit
- Davidllerenav
- · Replies 18 ·
Converting Candelas to Lumens for Car Headlights
- YoshiMoshi
- · Replies 12 ·
Conservation of angular momentum?
- jisbon
- · Replies 20 ·
Find the force while lapping a specimen
- blueboo33
- · Replies 6 ·
Derivation of the oscillation period for a vertical mass-spring system
- User1265
- · Replies 9 ·
Photoelectrons and Planck's constant
- benca
- · Replies 13 ·
Understanding T^2 x L Graphing for Simple Pendulum Experiment
- shivam28
- · Replies 7 ·
Electric field at a point from a 4.8 nC charge at (2.5 cm, 0.7 cm)
- nezsmith
- · Replies 3 ·
Write Maxwell’s first equation in simpler form (in wave number space)
- ameernassrah
- · Replies 1 ·
Frequency in an AC circuit given capacitance, voltage, and current
- adangerousdriver
- · Replies 6 ·
Calculate the average force used to drag a box up a ramp
- RyanRhino
- · Replies 5 ·
Finding the combined capacitance between A and B
- Eitan Levy
- · Replies 8 ·
[Special Relativity] Lorentz Transformation and Boosts
- Athenian
- · Replies 4 ·
Propagation of Error for Sodium Doublet Lines
- Browntown
- · Replies 2 ·
Circular fringes in a Fabry-Perot Interferometer
- Aurora_b
- · Replies 2 ·
Invariance of the Lorentz transform
- tina21
- · Replies 4 ·
Energy Conservation as an explanation for v=0 for spring mass system
- User1265
- · Replies 2 ·
Water temperature with two materials cooling it
- Stuka_Hunter
- · Replies 7 ·
What is the frequency of sound when a ball bounces off a wall?
- fizzyfiz
- · Replies 4 ·
Thermodynamics - Change in temperature for heated slabs of steel
- CJoy
- · Replies 3 ·
Units in acceleration calculations and distance from velocity-time graphs
- Ellio
- · Replies 2 ·
Why does ignoring phase in the ansatz for a driven oscillator give the right answer?
- etotheipi
- · Replies 2 ·
What is the resistance of the bulb filament
- isay1224
- · Replies 3 ·
[Special Relativity] - Finding Angle θ as Measured in Frame S
- Athenian
- · Replies 3 ·
[Special Relativity] Scalar Invariant under a Lorentz-transformation
- Athenian
- · Replies 8 ·
Clarifying Ambiguities in High School Physics Problems
- physicslady123
- · Replies 17 ·
Why are centripetal and gravitational forces equal in orbiting bodies?
- Moolisa
- · Replies 2 ·
Why do I keep getting the wrong answer on this static equilibrium and beam forces problem?
- benny1993
- · Replies 9 ·
Calculating Average Linear Velocity: 1.66m/s to 1.73m/s
- sci0x
- · Replies 1 ·
Find the force acting per unit width on the vertical wall
- Kaushik
- · Replies 21 ·
Optics focal length and optical power Question
- crystal1001
- · Replies 2 ·
Harmonic motion of four meter sticks
- ac7597
- · Replies 2 ·
How Accurate Is the Physics Behind a Bullet Striking a Metal Plate?
- jisbon
- · Replies 9 ·
What elements account for these absorption lines seen?
- Luminescent
- · Replies 4 ·
Max Power of a Tesla SUV: Solving F(net)=F(app)-F(resistance)
- physicslady123
- · Replies 2 ·
Torque Calculations: Solve for Disc Revolutions with Opposing Torque
- Kratos521
- · Replies 4 ·
Maximum height of roller coaster's second hill with friction losses
- Rainy_Pass
- · Replies 4 ·
The Time to Fall in a Plunge Orbit
- Jenab2
- · Replies 4 ·
How Do You Calculate Angular Momentum Components?
- Kjjm
- · Replies 6 ·
What Angle Are the Two Surfaces at?
- kftheuidfnaks
- · Replies 8 ·
How does polarization show the wave nature of light?
- flintstones
- · Replies 1 ·
How Does Thermal Expansion Affect the Density of Liquids?
- EEristavi
- · Replies 7 ·
How to find the magnetic field and magnetic force due to a solenoid loop
- Davidllerenav
- · Replies 1 ·
Calculating Masses Using Gravitational Force Equations
- ELLE_AW
- · Replies 5 ·
How Do Drones Achieve Flight Control?
- mxchapz
- · Replies 13 ·
Electromechanical Systems: Determine the voltage across a moving coil
- Yuuichirou
- · Replies 1 ·
[University Special Relativity] Lorentz Transformation and Boosts
- Athenian
- · Replies 2 ·
Rotational Inertia and Net Torque with Friction
- Isabel1747
- · Replies 10 ·
An object with mass m moving on x'x and Ep(x) = (1/2)*k*(x^2 - 4)^2
- Michael_0039
- · Replies 2 ·
Finding angles of nodal lines in two-point source interference
- benca
- · Replies 3 ·
Does gravitational acceleration change sign based on direction?
- Ellio
- · Replies 3 ·
How Do You Calculate Torques for a Ladder in Static Equilibrium?
- penroseandpaper
- · Replies 2 ·
Finding the energy of a charged sphere
- Eitan Levy
- · Replies 1 ·
Waves: Calculate the sound intensity from two speakers
- Karl Karlsson
- · Replies 3 ·
Average speed of a probability density wave and wave packets
- schniefen
- · Replies 17 ·