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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Estimating Atom Size using the Uncertainty Principle
- Quantum_man
- · Replies 6 ·
Is there anything missing in this motion equation?
- stephenn
- · Replies 2 ·
Length of an organ (closed at one end)
- Jbreezy
- · Replies 1 ·
Dynamics: Forces at 90 and 45 degrees
- sv_heavymetal
- · Replies 1 ·
Boyle's Law - Experiment Question
- charlottexo
- · Replies 2 ·
What is the voltage across the resistor?
- JayLewis
- · Replies 5 ·
Radiation Exp: Converting μCi to dps & Understanding Half-Lives
- Von Neumann
- · Replies 4 ·
Statics problem - too many unknowns?
- Gauss M.D.
- · Replies 1 ·
Projectile motion sniper bullet question
- kaushik29
- · Replies 1 ·
I think this problem has problem
- wrrrr95
- · Replies 3 ·
Validity of Kirrchoff's Laws in Electrical Circuits
- ehabmozart
- · Replies 1 ·
Resistors in parallel and series
- ehabmozart
- · Replies 3 ·
Need Double Check on a question
- silentcoder
- · Replies 5 ·
How Standing Posture Affects Comfort on a Bumpy Bus Ride
- magneto11
- · Replies 10 ·
Electrostatics - probably a standard question
- exuberant.me
- · Replies 5 ·
How Does the DeBroglie Wavelength of an Electron Compare to Familiar Objects?
- pdhakal
- · Replies 5 ·
What equations should I know about Classical Physics?
- avcireis
- · Replies 2 ·
Rotational Energy and momentum help
- mistasong
- · Replies 3 ·
Rotational Mechanics-Symmetric body goes up an incline.
- consciousness
- · Replies 4 ·
A aerialist on a high platform holds on to a trapeze attached to a sup
- cmkc109
- · Replies 2 ·
How Is the Diffraction Angle Calculated for Different Wavelengths?
- MarcL
- · Replies 3 ·
Short Change Resonance of a Damped, driven oscillator
- bd2015
- · Replies 1 ·
FM Radio receiver in RLC circuit with .200 microH Inductor
- penguinnnnnx5
- · Replies 5 ·
Problem about uncertainty principle
- Andurien
- · Replies 4 ·
What are the Maximum Speeds of a Pendulum with Attached Mass?
- SherlockOhms
- · Replies 5 ·
Buoyant Force of a ship and water
- dab353
- · Replies 8 ·
How do we know if an electric field is negative or positive?
- x86
- · Replies 2 ·
Mr. Fin uses a 710 W hairdryer for 14 minutes per day every day to dry
- Tj8
- · Replies 2 ·
Direction of current in the figure?
- ehabmozart
- · Replies 3 ·
Understanding Converging Lenses: Question on Image Size
- dioprem
- · Replies 6 ·
Angular Oscillation of a rod in a circle
- Tanya Sharma
- · Replies 1 ·
Will the ball rotate on a frictionless slope?
- aerograce
- · Replies 3 ·
Coffee Filter Lab: Finding n for the Drag Force
- keicee
- · Replies 7 ·
Velocity of 2 objects of different masses
- sgstudent
- · Replies 18 ·
Calculate Net Electric Field at Point P from Two Charges 45 cm Apart
- x86
- · Replies 6 ·
Rotational motion on pulley system
- NathanLeduc1
- · Replies 3 ·
The figure below shows an object on an inclined
- oneshot
- · Replies 5 ·
How Is the Magnetic Field Calculated in the Normal Zeeman Effect?
- dinospamoni
- · Replies 3 ·
How to Calculate Angular Velocity?
- Sneakatone
- · Replies 25 ·
A 5.0kg mass is accelerated from rest at the bottom of the 4.0 m long
- oneshot
- · Replies 4 ·
Distance of electron from nucleus
- dinospamoni
- · Replies 7 ·
Build a Shive Wave Machine - Project 102
- incegoren
- · Replies 6 ·
Emf induced by swinging rod in magnetic field (I got 2 answers?)
- unscientific
- · Replies 9 ·
Integral of Maxwell-Boltzmann dist.
- Denver Dang
- · Replies 2 ·
Electrostatics - find the work done
- exuberant.me
- · Replies 4 ·
How Do Angles Affect the Forces in Lifting Tongs?
- Gauss M.D.
- · Replies 3 ·
What is the net force on a rocket and how is it calculated?
- NK92
- · Replies 9 ·
How Much Work Does a Water Pump Do to Raise Water from a Well?
- student34
- · Replies 8 ·
Stern-Gerlack Experiment with silver atoms
- dinospamoni
- · Replies 1 ·
How to Calculate the Mass of Jupiter Using Orbital Data
- bona0002
- · Replies 4 ·
Car Crash Problem: Solving Speed Before Impact
- ryantosi
- · Replies 6 ·
Calculating Electron Probability in a Cone
- dinospamoni
- · Replies 1 ·
Thin Film Interference Problem: A hair is placed at the edge .
- nontradstuden
- · Replies 8 ·
Help settle an argument Mass system on frictionless pulleys
- resigned
- · Replies 6 ·
Is Circular Polarisation the Same as Linear Polarisation?
- Ezio3.1415
- · Replies 3 ·
Root mean square velocity question
- Insiya
- · Replies 12 ·
Momentum/kinetic energy w/ rifle
- CollegeStudent
- · Replies 2 ·
Terminology in rotational kinematics: distance vs displacement
- JeanJean
- · Replies 7 ·
Ideal gas law mechanical work problem
- DrOnline
- · Replies 8 ·
Newton's second low 3 connecting objects
- Some body
- · Replies 5 ·
Optics Problem: A real object and a converging lens
- anomalocaris
- · Replies 5 ·
Variable Magnetic field bound in a cylindrical region
- Saitama
- · Replies 9 ·
Solving Simple SR Questions: Find Proper Length & Speed of a Spacecraft
- Murgs2012
- · Replies 6 ·
Photons Moving Through a Single Slit (Uncertainty)
- trevor51590
- · Replies 1 ·
Determining the Thermocline in a Stratified Lake
- rico22
- · Replies 11 ·
Momentum change after explosion
- coconut62
- · Replies 4 ·
How can velocity be expressed as a function of time in polar coordinates?
- Clever_name
- · Replies 23 ·
Descending elevator stops determine displacement of mass on spring
- jm1379
- · Replies 3 ·
A uniform rectangular block of length 37.0 cm is placed so that its ce
- cmkc109
- · Replies 2 ·
A stubborn, 100.0kg mule sits down and refuses to move. To drag the mu
- cmkc109
- · Replies 3 ·
Using Centripetal Forces to find the radius of a circle
- QuickSkope
- · Replies 8 ·
A rod is 6 m long pivoted at a point 1.5 m from the left end. Two dow
- cmkc109
- · Replies 6 ·
Cross Product of Two Vectors - Mag. 2 & 4
- Zsmitty3
- · Replies 5 ·
How Do Standing Wave Equations Relate to Harmonics and Wavelength?
- oneshot
- · Replies 3 ·
Bullet hits block connected to wheel and bounces off
- Sunfun
- · Replies 14 ·
How does the force get cancel out?
- cmkc109
- · Replies 2 ·
Spring Oscillations Problem Question
- GoGoGadget
- · Replies 1 ·
Finding period of revolution of stars?
- rockchalk1312
- · Replies 7 ·
Size of the Diffraction grating ?
- Spiral1977
- · Replies 1 ·
Forced oscillations without damping
- Dixanadu
- · Replies 5 ·
Finding Normal and Tangential Acceleration Components in 2D Motion
- member 428835
- · Replies 2 ·
Time it would take muon to reach the surface of the earth. Work check.
- MelissaJL
- · Replies 8 ·
Calculating Induced EMF for a Changing Magnetic Field Loop
- nickmanc86
- · Replies 13 ·
Period of Pendulum A vs B: Find Faster Rate
- CivilSigma
- · Replies 3 ·
Time difference of events when moving at relativistic speeds
- Whistlekins
- · Replies 3 ·
Throwing a ball from atop a hill
- swevener
- · Replies 5 ·
A 42.9cm long tube has a 42.9cm long insert that can be pulled in and
- cmkc109
- · Replies 8 ·
Drilling through the Earth problem
- dinospamoni
- · Replies 1 ·
Finding Equilibrium in a 3D System of Forces
- Gauss M.D.
- · Replies 1 ·
2 Ohm's law/Power equations questions
- Normalization
- · Replies 12 ·
Practical uses of oscillator damping
- Dixanadu
- · Replies 7 ·
Illuminance on a table directly below a lamp
- Matthewkind
- · Replies 2 ·
Standing Waves: Finding the number of antinodes
- Turion
- · Replies 1 ·
Calculating phase difference of sound waves
- Turion
- · Replies 9 ·
Newtons 2nd law for non-rigid bodies
- aggie1293
- · Replies 2 ·
Variable Mass:Sand from balloon
- CAF123
- · Replies 8 ·
Finding the incidence angle for refraction
- SirBerr
- · Replies 3 ·
What Makes Light Waves Different from Mechanical Waves?
- Aadrish
- · Replies 3 ·
Closed ended tube resonance problem
- AbsoluteZer0
- · Replies 4 ·
How Fast Must a Block Slide to Circle a Loop After Inelastic Collision?
- physicslover11
- · Replies 1 ·