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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Virtual source at the back of the mirror
- PintoCorreia
- · Replies 12 ·
Find mass of black hole in center of galaxy given eccentricity+
- oddjobmj
- · Replies 2 ·
Angle Relationships in Lightray Reflections
- PintoCorreia
- · Replies 1 ·
Acceleration of a hanging mass
- chillpenguin
- · Replies 2 ·
Physics: Torque on a Disk problem - Multiple forces
- Zeus5966
- · Replies 7 ·
Atwood machine with two ropes on one of the blocks
- physiccs
- · Replies 1 ·
Mass shot into orbit; find max distance from Earth
- oddjobmj
- · Replies 3 ·
Understanding Momentum: Solving Simple Problems with Rocks on a Railroad Car
- sinclair18
- · Replies 6 ·
Calculating the friction on a curved path
- PhyIsOhSoHard
- · Replies 19 ·
Projectile Kinetic Energy Calculation
- oneplusone
- · Replies 2 ·
Dynamics: Planar Kinetics of a Rigid Body(Work and Energy)
- naynaitmus
- · Replies 6 ·
Solving Frequency of Harmonic Wave Problem
- zhartman
- · Replies 1 ·
What is the Height at Which a Falling Ball Reaches a Velocity of 5.2 m/s?
- maddief
- · Replies 2 ·
Finding heat gained by water when hot metal is placed in it.
- astru025
- · Replies 9 ·
A mirror reflection of a mirror reflection
- PintoCorreia
- · Replies 7 ·
Independent system displacement variables
- princejan7
- · Replies 1 ·
Question in (Conduction ) A steel plate 2 cm thick
- manal950
- · Replies 2 ·
Torque, Angular Momentum, & Angular Velocity test corrections
- adorfy
- · Replies 1 ·
Suppose a human could live for two hours (120 minutes ) unclothes in a
- manal950
- · Replies 3 ·
Question combined mode radiation and convection ?
- manal950
- · Replies 5 ·
Question about Light incident at an angle on a diffraction grating.
- Dgray101
- · Replies 3 ·
A radiator in a domestic heating system operates at a surface temperat
- manal950
- · Replies 7 ·
Simple problem involving pulley with mass
- Saitama
- · Replies 7 ·
Conservation of angular momentum in an inelastic collision?
- mot
- · Replies 5 ·
How Is the Net Gravity Force Calculated Between Earth, Moon, and a Rocket?
- The Subject
- · Replies 16 ·
Capacitors, potential difference, electric displacement
- izzy93
- · Replies 1 ·
Can Momentum Save an Astronaut 200m Away from the ISS?
- MathewsMD
- · Replies 1 ·
Solving Kepler's Third Law for Period - 6.7E6m
- KVat390
- · Replies 11 ·
Why period is half ? Spring problem
- k31453
- · Replies 5 ·
Electric flux passing through a plane
- ViolentCorpse
- · Replies 2 ·
Drawing Light Beam Reflected in Mirror: A & B's Analysis
- PintoCorreia
- · Replies 5 ·
Internal vs external force - conservation of momentum in one dimension
- letoiledemer
- · Replies 2 ·
Deriving Equation of Reduced Mass W/ Angular Momentum
- Dgray101
- · Replies 11 ·
Waterfall Question Work and Energy
- Arythmatic
- · Replies 2 ·
Interpreting a banked circular motion question
- BOAS
- · Replies 5 ·
Flux Through Sphere: Cylindrical Coordinates
- bowlbase
- · Replies 6 ·
How Much Pressure Is Needed to Launch a Marble at 5 m/s?
- Fifty
- · Replies 3 ·
Help Check My Homework: Two Boats & Passenger Speed
- YummyPotato
- · Replies 3 ·
EMF induced in coil by magnetic field
- iRaid
- · Replies 15 ·
How much work is done when carrying a load up a set of stairs?
- Blonde1551
- · Replies 2 ·
How Does a Grapefruit Affect Spring Compression?
- physicsdb
- · Replies 3 ·
Surface Tenstion in Water (Needle resting on water)
- FaraDazed
- · Replies 4 ·
Accelerating Beaker containing liquid
- andyrk
- · Replies 3 ·
How Can I Prove This Complex Fraction Equation?
- spiruel
- · Replies 2 ·
Circular Motion with static friction
- NickyQT
- · Replies 2 ·
Estimating convergence of GRACE twin-satellites due to gravitational mass
- jacmacg
- · Replies 7 ·
Why is this line of reasoning wrong?
- mjordan2nd
- · Replies 5 ·
Optic fibers atenuation problem
- Jalo
- · Replies 1 ·
How Do Accelerations and Angular Acceleration Relate in a Disk and Mass System?
- Saitama
- · Replies 23 ·
Solving Fresnel Coefficient Equations
- Dassinia
- · Replies 3 ·
How Much Water Can a Freezer Turn to Ice in One Hour?
- soccer4life
- · Replies 4 ·
Deducing Number of Molecules in a Scuba Tank
- aerograce
- · Replies 2 ·
Transition in magnetic refrigeration
- CAF123
- · Replies 1 ·
Calculating & Visualizing Motion: 2kg Circular Motion
- toljin123
- · Replies 1 ·
Directions of (electro)magnetic fields/application of right hand rule
- chris69
- · Replies 4 ·
Conservation of momentum question
- overtak3n
- · Replies 6 ·
What is the speed of a mass on a spring at a displacement of 0.2 m?
- CabalGroupie
- · Replies 4 ·
Greatest Force without causing the rod to slip
- frownifdown
- · Replies 13 ·
Energy content of gasoline and hydrogen comparative math question
- courtneywetts
- · Replies 36 ·
Wavefunction with specific values
- Gringema
- · Replies 1 ·
Energy from Waste: How Much Electricity Can 230M Tonnes Produce?
- mz19
- · Replies 6 ·
Two Transformers, voltage before and after on two different coils
- codytanner16
- · Replies 1 ·
Computing net Moment of Intertia
- Nicolaus
- · Replies 7 ·
Period of Oscillation for vertical spring
- conniebear14
- · Replies 3 ·
(simplified?) Air drag force question.
- dizweld
- · Replies 27 ·
Kinematics: when will the two cars meet?
- get_physical
- · Replies 19 ·
Graphing the Curl of -Cx\vec{z} on the xz plane
- scorpius1782
- · Replies 1 ·
Calculating Uncertainties of Measured quantities (Physics)
- Joystar77
- · Replies 10 ·
What is the average force of gravity between Earth and the moon?
- snakeboy91
- · Replies 2 ·
What is the Kinetic Energy of a Rotating Square Mass-Spring System?
- proximaankit
- · Replies 2 ·
Bond energy between two water molecules
- FaraDazed
- · Replies 3 ·
How Is the Temperature of an Asteroid Between Mars and Jupiter Calculated?
- courtneywetts
- · Replies 2 ·
Electrical Field around Spherical Ball at origin
- Philosophaie
- · Replies 2 ·
Finding specific heat capacity of a non-monatomic (ideal gas)
- BOAS
- · Replies 2 ·
Rotational Kinematics: Slowing Down Turntable
- hb20007
- · Replies 5 ·
Electronics, Wheatstone bridge, with a twist.
- brokenbarbie
- · Replies 3 ·
Calculating Work for a Bead on a Square Loop in an Electric Field
- scorpius1782
- · Replies 8 ·
How Much Energy and Money Does Switching to a Compact Fluorescent Lamp Save?
- mz19
- · Replies 4 ·
Finding change in internal energy
- BOAS
- · Replies 2 ·
What Happens to Primary Voltage if 8V is Applied to Secondary Coil?
- vroomba03
- · Replies 1 ·
Where Did I Go Wrong in My Multiloop Circuit/Kirchhoff Calculation?
- PhizKid
- · Replies 17 ·
Dynamics question regarding moment of inertia
- chicagobears34
- · Replies 1 ·
Question about fiding speed and distance
- sofiasherwood
- · Replies 11 ·
Pulley Problem: Speed after falling a known distance
- frownifdown
- · Replies 7 ·
Distance travelled of block, friction, forces
- johnnnnyyy
- · Replies 6 ·
Earth wire and Neutral wire are swapped. Can appliance work?
- Betadine
- · Replies 3 ·
Hunter and Monkey - Kinematics algebra question
- northernwind
- · Replies 18 ·
Pulleys with inertia and friction
- johnschmidt
- · Replies 4 ·
Coulomb's law and spherical charge distribution
- Avatrin
- · Replies 9 ·
One-dimensional motion with drag
- cupparamen
- · Replies 2 ·
Finding speed of a object on slope
- thewestbrew
- · Replies 1 ·
Elastic collision and inelastic collision
- andylie
- · Replies 5 ·
Which is the dependent and which is the independent?
- sph
- · Replies 5 ·
Momentum/Kinetic Energy Problem
- ClassicRock
- · Replies 6 ·
Determine depth of a well using the speed of sound
- slurik
- · Replies 2 ·
Question regarding earth's core and volume
- Remon
- · Replies 15 ·
Torque and angular acceleration
- fogvajarash
- · Replies 5 ·
Temperature of an astroid between planets
- nwag93
- · Replies 2 ·
Forward biased ideal diode=>no voltage drop?
- pyroknife
- · Replies 5 ·
How Does Angular Motion Affect the Centrifugal Force on a Motorcar Wheel?
- Renni202
- · Replies 3 ·