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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Water and Gravity: Can Water Lift Weights?
- Idea04
- · Replies 5 ·
Having a bit of trouble figuring something out about a doorbell
- Byrgg
- · Replies 10 ·
Change in acceleration due to gravity
- shill
- · Replies 3 ·
Perfectly inelastic collision between two runners verification
- PHYclueless
- · Replies 1 ·
Finding a vector of magnitude 27 parallel to 3i+4j
- masterofthewave124
- · Replies 29 ·
Need thorough explanation-electric field
- boris16
- · Replies 4 ·
Resolve all the Tension into horizontal and vertical forces
- masterofthewave124
- · Replies 3 ·
Vector Scalar Product and KE questions
- Walczyk
- · Replies 2 ·
What kinds of energry conversions
- meemosewa
- · Replies 3 ·
Heater causes room temp to rise
- Bradracer18
- · Replies 1 ·
Heat engine/max height person can climb
- Bradracer18
- · Replies 4 ·
Calculate Period of Planet X with Kepler's Third Law
- meemosewa
- · Replies 3 ·
Solving an Inelastic Collision with a Spring: Maximum Compression
- Delzac
- · Replies 7 ·
What is the difference between double torque and single torque?
- lil_agelu4life
- · Replies 2 ·
KE of electron being attracted by 2 protons
- al_201314
- · Replies 4 ·
Why does squeezing a hose make the water go further?
- Pangolin
- · Replies 3 ·
Mass Dilation and Velocity Question
- illwerral
- · Replies 8 ·
How does the force on a bar magnet change as it moves through a loop?
- dannyp
- · Replies 6 ·
Bernouilli's principle and downforces
- OCCxlr8ed
- · Replies 1 ·
Gravitational Potential Energy of a planet
- sophzilla
- · Replies 8 ·
Focal length of concave lens using convex lens
- Amith2006
- · Replies 3 ·
Solving Electrical Currents Equations
- neb1627
- · Replies 1 ·
Superposition net gravitational force
- sophzilla
- · Replies 2 ·
Tension in Chain in Multiple Pulley Station
- magnumxlv
- · Replies 1 ·
Temp rise due to hammering nails
- Bradracer18
- · Replies 11 ·
Simple force question that I cant get
- mikejones2000
- · Replies 1 ·
Charge flowing when a 0.4 m square loop is crushed in a 2.3 T field
- fishmonger
- · Replies 4 ·
How Should Impulse Be Applied to a Rod to Make It Land Upright?
- Saketh
- · Replies 8 ·
Qns On The Equations Of Momentum
- Delzac
- · Replies 3 ·
Energy required to raise a roller coaster train uphill
- coldcell
- · Replies 7 ·
Finding launch angle for projectile with known range and initial speed
- Chib
- · Replies 7 ·
Solving Triangle Problems with 3D Coordinates
- D.T.
- · Replies 6 ·
Counting Particles Passing Through a Hole
- Endarmacional
- · Replies 1 ·
Why does Y move east after elastic collision, not X west?
- al_201314
- · Replies 5 ·
Why are my questions given least importance?
- Amith2006
- · Replies 9 ·
Friction forces to keep board from slipping
- rcwha
- · Replies 10 ·
Power needed for Superman to pull a train up a 15° incline
- atOnz
- · Replies 5 ·
What is the required speed to successfully complete the spinning cylinder game?
- stevo13
- · Replies 1 ·
Velocity of an ion given the potential difference it is accelerated through?
- runran
- · Replies 4 ·
Moment of inertia, Sphere. New method.
- jaeoos
- · Replies 3 ·
Help with physics assignment problems
- tony_n88
- · Replies 30 ·
How Does Adding a Spring Affect Collision Outcomes?
- chandran
- · Replies 2 ·
Does Point A Have Maximum or Minimum Intensity?
- al_201314
- · Replies 5 ·
SE- How to Determine Oil Temperature at Exit of Cylindrical Heat Exchanger?
- Bibinou
- · Replies 3 ·
Analyzing Superhero Physics: How Fast Can Superman Really Go?
- atOnz
- · Replies 6 ·
Conservation of energy - the elevator question
- jamesm113
- · Replies 8 ·
Three blocks connected by strings over a pulley
- vinny380
- · Replies 13 ·
Calculating the radius of a nucleus of a Pd-118 atom
- Lt.Saccharine
- · Replies 1 ·
Find the Initial Height of a Falling Block
- c4iscool
- · Replies 7 ·
Calculate Wavelength of 3.85 MeV Gamma Radiation from Technetium-99
- missy~needs~help
- · Replies 3 ·
Answer Projectile Velocity when Hitting Ground: 15.3 m/s
- conkle08
- · Replies 3 ·
Change in position of image due to insertion of glass slab
- Amith2006
- · Replies 4 ·
What Is the Incident Angle for the First Null in a Diffraction Pattern?
- sssddd
- · Replies 7 ·
Finding the mass of a vehicle in a collision
- c4iscool
- · Replies 22 ·
Fundamental Frequencies and Standing Waves
- Lil ze
- · Replies 9 ·
Solving a Statics Problem: Finding Reactions Forces
- Rumpelstiltzkin
- · Replies 3 ·
How Can I Test Relativity or the Photoelectric Effect for a Science Fair?
- Quantum1332
- · Replies 7 ·
I know what mol is, but what is kmol?
- allok
- · Replies 1 ·
Why Isn't My Physics Experiment Calculating Distance Correctly?
- lucky_boy
- · Replies 7 ·
What is the Geometric Relationship Between Vectors and Their Components?
- nothing123
- · Replies 11 ·
What factors affect evaporative cooling temperature drop?
- bjgawp
- · Replies 5 ·
Meter stick against wall with suspended block equilibrium
- mrtheshaggy
- · Replies 2 ·
The Impact of Measuring the Magnetic Field on Electron Interference Patterns
- stunner5000pt
- · Replies 5 ·
Why is the first ionization energy for sodium smaller than the second?
- Pechy
- · Replies 2 ·
Concept of quantization-Schroedinger equation
- War-Saw
- · Replies 2 ·
What is the variational principle and how does it apply to physics?
- War-Saw
- · Replies 1 ·
Critical angle for TIR in a glass prism with n=1.44
- Alain12345
- · Replies 4 ·
What velocity makes a proton relativistic?
- jimmy_neutron
- · Replies 3 ·
Air bubble inside a glass sphere problem
- Amith2006
- · Replies 1 ·
Power of a spherical refracting surface
- Amith2006
- · Replies 1 ·
Trouble locating and describing a convex lens image
- Alain12345
- · Replies 4 ·
@ould the elevator be moving up or down?
- elizabethR
- · Replies 4 ·
Innacurate movie physics project
- Voltaire429
- · Replies 6 ·
Is object visibility from unevenly or evenly reflected light?
- yabadabado111
- · Replies 1 ·
Moment of inertia of bar with balls about an off-center axis
- cukitas2001
- · Replies 18 ·
How does internal resistance affect EMF and current in a circuit?
- Lil ze
- · Replies 3 ·
Solve Free-Fall Problem: A Ball Dropped from Rest
- ny_batteri4536
- · Replies 4 ·
Standing wave on a string with 7th overtone
- kooaznboi1088
- · Replies 7 ·
Max induced voltage in rotating elliptical coil in Earth's magnetic field
- Trista
- · Replies 1 ·
Invisibility of flint glass rod in carbon disulfide
- Amith2006
- · Replies 3 ·
How do you insert equations on the forum
- NEWO
- · Replies 1 ·
Griffiths (electrostatics) problem
- Kolahal Bhattacharya
- · Replies 4 ·
Finding density at a point inside a sphere from mass and radius
- Yanah
- · Replies 8 ·
Sign conventions for convex and concave mirror focal lengths
- Amith2006
- · Replies 10 ·
Checking Your Work: Calculating Equivalent Resistance
- jg95ae
- · Replies 2 ·
Problems On Work-Energy Theorem
- Delzac
- · Replies 12 ·
Electric Charge on a uniformly charged disk
- aquabug918
- · Replies 1 ·
Angle of inclined mirror for reflected ray to become vertical
- Amith2006
- · Replies 1 ·
Calculate the torque on the pedal
- masterofthewave124
- · Replies 4 ·
Light ray reflections between two parallel plane mirrors
- Amith2006
- · Replies 3 ·
Moment of inertia with centroid and Steiner's theorem
- HERiTAGE
- · Replies 8 ·
Relative velocity of two boats and separation distance
- VinnyCee
- · Replies 4 ·
Alpha vs beta particle mass, energy and momentum, and blocking beta radiation
- jimmy_neutron
- · Replies 3 ·
What Angle Should a Cannon Be Fired to Hit a Target 2000m Away and 800m Above?
- tuna_wasabi
- · Replies 6 ·
Electric Charge and Electric Fields
- aquabug918
- · Replies 2 ·
Measuring wind speed with ball and string Newtons 2nd law
- eboarder2020
- · Replies 4 ·
Revs per min from metres per second
- Taryn
- · Replies 7 ·
Relative-Motion analysis between two particles
- VinnyCee
- · Replies 3 ·
How does air blowing over a u-tube affect the heights of water and oil columns?
- JJMezzapesa
- · Replies 6 ·