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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Ground state wavelength and uncertainty Bohr/deBroglie model
- Summer95
- · Replies 1 ·
How deep can you dive to get 3x pressure? (101,3 kPa)
- DecoratorFawn82
- · Replies 12 ·
What does "minimum range of uncertainty" mean in QM?
- Summer95
- · Replies 1 ·
Shouldn't these equations produce the same result?
- Breadsticks
- · Replies 1 ·
What Should the Initial Velocity of the Grenade Be in a High-Speed Car Chase?
- jasonchiang97
- · Replies 4 ·
Absolute Visual Magnitude of Stars
- Jimbob999
- · Replies 1 ·
How Is the Nomenclature in 13C(alpha,n)16O Read and What Do Alpha and n Mean?
- heartofcourage
- · Replies 1 ·
Distance traveled during a head on collision
- Kevin Krock
- · Replies 36 ·
Hooks Law F = kx Book answer wrong I think
- Barclay
- · Replies 8 ·
Projectile Motion Water hose Question
- jasonchiang97
- · Replies 15 ·
What is the minimum safe following distance at highway speeds?
- Alexis Cooper
- · Replies 3 ·
Capacitance (Potential Difference and Energy)
- kilnvzol
- · Replies 10 ·
Determining charges and current distributions
- TubbaBlubba
- · Replies 1 ·
Measuring a paper clip with precision
- dirtcrazy
- · Replies 2 ·
2 sphere system, Conservation of Energy and Momentum
- Better WOrld
- · Replies 59 ·
AP Physics differential equation
- MrPyromaniac
- · Replies 2 ·
Three forces equilibrium and Newton's third law true/false
- chance master
- · Replies 4 ·
Flux Through Concentric Spheres with Varying Charge Density
- SarahAlbert
- · Replies 2 ·
How can the motion of point A be determined in this system?
- Vibhor
- · Replies 35 ·
Heat Transfer by Nichrome wire and Steel
- zwarrior
- · Replies 20 ·
Relativistic velocity problem with x and y components
- Luke Cohen
- · Replies 4 ·
Help labeling a locking mechanism diagram in SketchUp
- erthiph
- · Replies 1 ·
What Is the Role of the BC548 Transistor in a Piezoelectric Energy Harvester?
- menloon
- · Replies 2 ·
Finding normal and tangential acceleration
- Inveritatem
- · Replies 3 ·
Using dimensional analysis to check which kinematic equations are valid
- Yousufshad
- · Replies 7 ·
Finding angular acceleration when tire radius is not given
- Breadsticks
- · Replies 3 ·
When will velocities of the trains equal?
- Entr0py
- · Replies 5 ·
Calculating Time in Air for a Vertically Thrown Ball
- Entr0py
- · Replies 7 ·
How does the counterweight affect elevator power?
- Janiceleong26
- · Replies 9 ·
Struggling to Understand Pulley System Dynamics
- JoshW
- · Replies 4 ·
What is the Formula for Calculating Entropy Change in a Phase Transition?
- Nicco de Vera
- · Replies 3 ·
Work done by charge in electric field on the xyz plane
- PhysicsQuest1
- · Replies 8 ·
Some multiple choice questions.
- goonking
- · Replies 2 ·
Why Is My Calculation of Vertical Hydrostatic Force Incorrect?
- The Real Nick
- · Replies 14 ·
Why Is Gravity Sometimes Negative and Sometimes Positive in Equations?
- jcharle111
- · Replies 2 ·
Deriving the Compton Effect Equation: A System of Equations Approach
- eje5758
- · Replies 1 ·
Calculating Electrostatic Force on a Suspended Gossamer Spider
- Callix
- · Replies 7 ·
Finding the time and maximum height at highest point
- NotFrankieMuniz
- · Replies 6 ·
Conservation of momentum in relativistic disintegration
- Frank Einstein
- · Replies 4 ·
Value of gamma in adiabatic process
- Pouyan
- · Replies 2 ·
What is the angle between coupled forces with a given moment and magnitude?
- whitejac
- · Replies 3 ·
Using friction in circular motion
- PAstudent
- · Replies 8 ·
Inelastic collision Two angles and final velocities
- -PhysicsMajor-
- · Replies 3 ·
Kepler's third law of planetary motion
- accountdracula
- · Replies 16 ·
Why does the standing wave equation have different sine and cosine forms?
- Voidy
- · Replies 1 ·
Calculating velocity with force
- mia_material_x1
- · Replies 3 ·
How long can the battery power the lightbulb?
- TravvyM
- · Replies 3 ·
Calculating acceleration of gravity on a planet
- mia_material_x1
- · Replies 1 ·
Mass of one component in two component w/feed flowrate
- BigJon
- · Replies 2 ·
Velocity transformations - light at an angle
- Phynos
- · Replies 4 ·
Calculating electrostatic pressure
- June_cosmo
- · Replies 2 ·
What is the initial velocity of the ball just as it enters the screen?
- camp_loll
- · Replies 1 ·
Is it possible to implement this circuit operation?
- ToonBlue
- · Replies 4 ·
How to find the time-base setting for a cathode ray oscilloscope
- Janiceleong26
- · Replies 3 ·
What is the spring constant for the spring?
- songminho
- · Replies 2 ·
Minimum output e.m.f. of the power source
- Janiceleong26
- · Replies 2 ·
Minimum F2: perpendicular to FR or to F1?
- werson tan
- · Replies 10 ·
Charged balls connected by spring
- yango_17
- · Replies 10 ·
Difference between Centroid and Centre of Pressue
- Yam
- · Replies 3 ·
Electron potential/momentum problem
- orangeincup
- · Replies 5 ·
What is the acceleration of each block?
- siimplyabi
- · Replies 5 ·
Is My Calculation of 81.48 Meters in Projectile Motion Correct?
- Kingyou123
- · Replies 3 ·
Why Does Car A Appear to Travel Southeast from Car B's Perspective?
- Michele Nunes
- · Replies 4 ·
What is the charge density and electric field inside a polarized hydrogen atom?
- yango_17
- · Replies 1 ·
Tension on cable CD when moment on A is Zero.
- Yan_33
- · Replies 1 ·
Ratio of the Magnitude of gravitational force?
- Albert24
- · Replies 5 ·
3D Statics Equilibrium - Dot Everything with Vector P?
- absolutezer0es
- · Replies 3 ·
[Theory] What's the initial velocity of this falling object?
- Kanyka
- · Replies 8 ·
Finding partition functions of statistical system
- CAF123
- · Replies 7 ·
What angle does the hanging mass make?
- diredragon
- · Replies 6 ·
What are the equal-and-opposite forces of friction forces?
- thecommexokid
- · Replies 3 ·
Creating a positron and a electron with a photon
- Frank Einstein
- · Replies 4 ·
Why do filaments of bulbs heat up?
- Jimmy87
- · Replies 1 ·
Finding the sign of refractive power for three thick lenses in sequence
- bowlbase
- · Replies 7 ·
Finding Turns Ratio for Different Transformer Configurations
- Altan Tok
- · Replies 1 ·
How to Find Electric Field for Concentric Spheres Using Gauss's Law?
- SarahAlbert
- · Replies 8 ·
Center of mass of medicine ball
- Rifscape
- · Replies 4 ·
Understanding centripetal force
- SamC
- · Replies 6 ·
Calculation of work done -- force confusion
- gracy
- · Replies 19 ·
Minimum force required to form sphere
- Tanya Sharma
- · Replies 36 ·
Fisherman's boat Relative motion
- heythere1010
- · Replies 29 ·
Physics velocity acceleration and force -- Project
- 353535amelia
- · Replies 6 ·
Charged Particles (Potential Energy)
- kilnvzol
- · Replies 4 ·
What Is the Ground Speed of a Plane with a North Wind?
- Euler2718
- · Replies 2 ·
Finding the direction angle when subtracting force vectors P and Q
- dlacombe13
- · Replies 6 ·
What is the weight of a radioactive sample with a given half-life and activity?
- jije1112
- · Replies 3 ·
What angle to shoot the arrow at?
- Ritzycat
- · Replies 17 ·
Airplane Motion in Plane: West 900 km/h vs NE 300 km/h
- RENI2345
- · Replies 1 ·
Inelastic car collision, answers aren't matching up
- BananasAreCool
- · Replies 4 ·
Struggling with Uranium-235 Nuclear Fission
- accountdracula
- · Replies 5 ·
Position with respect to velocity
- Robb
- · Replies 1 ·
How Is Tension Calculated in a Rope During Rock Climbing?
- LostAce
- · Replies 18 ·
How do i figure out area under the the red-brown line graph?
- Kaleem
- · Replies 20 ·
Heat radiated from a copper block at 250°C per square cm
- annedi
- · Replies 12 ·
Lattice constant, space between planes?
- orangeincup
- · Replies 1 ·
Why is the E cross B drift velocity constant in charged particle motion?
- alannakamura
- · Replies 6 ·
How much solar radiation is absorbed by a snow-covered surface?
- annedi
- · Replies 2 ·
Gravitational force confusing question
- Wesdxc
- · Replies 4 ·
Two Prisms connected by a material of refractive index n
- Potatochip911
- · Replies 3 ·
Unsolvable tension force problem
- KABOOM_physics
- · Replies 9 ·