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 a free particle in an infinite well have uncertainty bigger than h/2 ?
- drop_out_kid
- · Replies 4 ·
Σ free on two dielectric spherical surfaces
- guyvsdcsniper
- · Replies 2 ·
Energy change under point transformation
- LCSphysicist
- · Replies 1 ·
Write a realistic word problem for which this is the correct equation
- ChetBarkley
- · Replies 7 ·
Finding the Compression of a Spring Using the Work-Energy Theorem
- student34
- · Replies 4 ·
Interpreting the Conservation of Momentum in a Splitting Object Scenario
- SayedD
- · Replies 7 ·
Finding pool depth using Snell's law with 30° incident angle
- tomceka
- · Replies 6 ·
AC circuit power formula question
- bluesteels
- · Replies 2 ·
Dispersion diagram of light source seen through prism
- D_J
- · Replies 16 ·
A classical mechanics problem involve rotating
- drop_out_kid
- · Replies 2 ·
How Does Colatitude Affect the Direction of Coriolis Force?
- drop_out_kid
- · Replies 1 ·
Water fountain height from parabolic trajectory using kinematics
- h1a8
- · Replies 25 ·
Painter on a crate - Acceleration
- Shreya
- · Replies 12 ·
Magnets near a current carrying wire
- vasya
- · Replies 12 ·
Galilean transform and Lorentz transform questions
- rgtr
- · Replies 2 ·
E-field of solid sphere with non-uniform charge density
- mncyapntsi
- · Replies 3 ·
How much ice to cool down this water?
- Polarbear10
- · Replies 17 ·
A rocket on a spring, related to potential/kinetic energy
- ChetBarkley
- · Replies 3 ·
Yes! Calculating Friction Coefficient
- extDependency
- · Replies 1 ·
Is the Bohr Model Defined by Equating Coulomb and Centripetal Forces?
- drop_out_kid
- · Replies 22 ·
Measurement of speed using redshift or blueshift
- mugen715
- · Replies 5 ·
Power required to climb a 20-m-tall building in 55s
- ChetBarkley
- · Replies 1 ·
To move a block up to the top of the wedge
- rudransh verma
- · Replies 45 ·
Need feedback on my solution
- dorothy
- · Replies 17 ·
Finding the force of reaction as a function of time
- jumboopizza
- · Replies 6 ·
Friction directions when a block is on the verge of sliding on an inclined plane
- nab_
- · Replies 30 ·
Estimating the Bohr radius from the uncertainty principle
- drop_out_kid
- · Replies 1 ·
A practice problem with Schrodinger equation
- drop_out_kid
- · Replies 9 ·
Incorrect Calculation of Time for Reactor Energy Phase Change
- runningphysics
- · Replies 1 ·
A proton emitting and re-absorbing a pi meson
- lylos
- · Replies 2 ·
Constraints on a hoop rolling on a cylinder
- LCSphysicist
- · Replies 1 ·
Why is the first peak in the Franck-Hertz experiment longer than the others?
- Terrycho
- · Replies 3 ·
Dimensional analysis of the equation u=prg
- dtfw
- · Replies 38 ·
When does a bar with an off-center mass lose horizontal stability?
- jonny997
- · Replies 16 ·
How many electrons flow into an iron cube connected to a 1.5V battery?
- vasya
- · Replies 11 ·
Rocket ejecting mass in a direction perpendicular to its velocity
- LCSphysicist
- · Replies 6 ·
Lagrangean and non inertial frame
- LCSphysicist
- · Replies 3 ·
What is the significance of torque in the context of moment of force?
- dorothy
- · Replies 30 ·
States in the Hydrogen Atom that are not allowed
- guyvsdcsniper
- · Replies 18 ·
Fluid Heights in an Open U-Tube
- annamal
- · Replies 6 ·
What Determines the Number of Particles per Unit Volume in Ionized Hydrogen?
- LCSphysicist
- · Replies 2 ·
Where does a couple act when dismembering frames for FBDs?
- Yossi33
- · Replies 4 ·
What does the star mean in this table?
- FannoFlow88
- · Replies 1 ·
Probability of electron in hydrogen nucleus for 1s and 2s wave-functions
- guyvsdcsniper
- · Replies 29 ·
Velocity Formulas for Projectile Motion
- chromechris1
- · Replies 10 ·
Circular motion to projectile motion
- ChetBarkley
- · Replies 18 ·
Box moving up an inclined plane with deceleration
- dorothy
- · Replies 24 ·
Consider three models of the Mass distribution in the Milky Way
- Barbequeman
- · Replies 4 ·
Olympiad dynamics problem with 3 masses and a pulley
- Glenn G
- · Replies 17 ·
Momentum of ball on a pool table
- ih8pa1n
- · Replies 12 ·
Going From EMF to Faraday's Law to find E-field in my HW problem
- ChanceLiterature
- · Replies 6 ·
How to find the forces in a particular framework of light rods
- gnits
- · Replies 11 ·
What is the "r" in the moment of inertia?
- vparam
- · Replies 13 ·
Finding the reaction at hinge A: where did I go wrong?
- gnits
- · Replies 3 ·
Force of the wall against the ladder is from static friction?
- annamal
- · Replies 6 ·
Time taken to start pure rolling
- Titan97
- · Replies 8 ·
Why does a door hinge satisfy -Ax = Bx instead of Ax = Bx?
- annamal
- · Replies 14 ·
Thermodynamics - Latent Heat Problem (finding mass)
- Galois_
- · Replies 7 ·
Newton's third law -- I have trouble with some real-life examples
- Juni M
- · Replies 6 ·
Forces when car wheels "lay rubber"
- vparam
- · Replies 5 ·
Why does RHR give opposite force direction between two wires?
- bluesteels
- · Replies 12 ·
A problem involving thin film interference
- lorenz0
- · Replies 2 ·
Shear lines from a FBD with distributed forces
- Finn072
- · Replies 4 ·
Time for ball to roll half distance s down smooth incline
- Eobardrush
- · Replies 8 ·
Calculating final rotational speed from angular velocity
- Anmol Dubey
- · Replies 6 ·
Force and pressure -- Pulling apart two hemispheres with low pressure inside
- Elias Waranoi
- · Replies 7 ·
How do inlet and outlet times relate to speed of sound and flow velocity?
- FannoFlow88
- · Replies 6 ·
Preventing a block from sliding down a frictionless inclined plane
- yesmale4
- · Replies 5 ·
How to calculate distance traveled if you know a(v) graph equation?
- malakuka3
- · Replies 17 ·
Finding time taken to stop a skater given mass, velocity and force
- Anmol Dubey
- · Replies 3 ·
Find largest potential energy difference between 2 loop orientations
- Jaccobtw
- · Replies 4 ·
Optimal Solution for Avoiding Cable Slip from Groove
- Krismein
- · Replies 17 ·
Simple Ramp motion problem, but going full vector mode
- babaliaris
- · Replies 29 ·
Work done by cord on the pulley
- annamal
- · Replies 4 ·
Visualizing Series Bandpass Filters: A Graphical Approach
- so_gr_lo
- · Replies 4 ·
Find the inertia of a sphere radius R with rotating axis through the center
- annamal
- · Replies 17 ·
Finding the angle at the apex of a rhomb with incoming linear wave
- happyparticle
- · Replies 12 ·
Conservation of energy -- Using a spring to launch a ball up an incline
- tootired
- · Replies 7 ·
Euler-Lagrange equation for two-mass pulley system
- bookworm031
- · Replies 5 ·
Some confusion about work done to separate charges
- Jaccobtw
- · Replies 11 ·
Find the acceleration of the masses
- Monsterboy
- · Replies 12 ·
Special Relativity Muon problem
- Diracobama2181
- · Replies 6 ·
Earth's magnetic force on a proton
- Jaccobtw
- · Replies 3 ·
How does radioactive decay work?
- cpspolly
- · Replies 1 ·
Find the center of mass of a uniform semicircular plate of radius R
- annamal
- · Replies 6 ·
Find the Potential energy of a system of charges
- Jaccobtw
- · Replies 9 ·
Basketball bounce height vs surface density equations
- Whtbrd
- · Replies 2 ·
Can a matrix with all zero diagonal entries be diagonalized?
- pizzamakeren
- · Replies 2 ·
Find the current through a complicated circuit
- Jaccobtw
- · Replies 39 ·
Adiabatic expansion with temperature-dependent gamma
- usrename
- · Replies 1 ·
Fourier series, periodic function for a string free at each end
- Redwaves
- · Replies 8 ·
How Do You Calculate the Mass of the Moon Using Surface Gravity?
- Mikasun1108
- · Replies 14 ·
Finding Potential inside a hollow sphere
- guyvsdcsniper
- · Replies 6 ·
Find the resistance of electrons in nanoshells
- Jaccobtw
- · Replies 13 ·
Finding maximum horizontal range by varying initial height
- annamal
- · Replies 4 ·
Conservation of Energy for satellite in an elliptic orbit
- NathanLeduc1
- · Replies 14 ·
Determine how much energy the alpha particle carries
- Woopa
- · Replies 14 ·
Momentum Conservation: Bullet enters a block
- Shreya
- · Replies 2 ·
How to solve an inequality from the start
- mopit_011
- · Replies 1 ·
How do I calculate the work done by a force field using the dot product?
- annamal
- · Replies 12 ·