Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
What Is the Index of Refraction for Each Wavelength in a Prism?
- ghostops
- · Replies 1 ·
What happens to uncertainty when I divide values by a constant and squ
- Akbar123
- · Replies 3 ·
How does ε = xe^(-x²) give dx in the first step?
- lecammm
- · Replies 3 ·
What curve does a point on a rolling wheel trace?
- bobie
- · Replies 12 ·
OCR A2 Physics cosmic microwave background radiation question
- cakeislife
- · Replies 1 ·
Surface Area of Parallel Capacitors
- baby_1
- · Replies 4 ·
First HW - Two firecrackers explode at the same place in the lab
- crazyapeguy
- · Replies 1 ·
Sign Convention for Work Done by Varying Force
- misterpugsly
- · Replies 21 ·
Person walking on overhanging plank before it tips
- BrainMan
- · Replies 7 ·
After two time constants of time have elapsed, the current in the circ
- TravisBoyd
- · Replies 3 ·
Bouyant Force in a U Shaped Plastic Tube
- chillpenguin
- · Replies 1 ·
If the loop is rotated in the opposite direction by the same amount, w
- TravisBoyd
- · Replies 1 ·
Finding the pivot point for Tom to lift a 600lb stone with a lever
- CougarPride
- · Replies 2 ·
Coulomb's Forces triangle of charges
- pumpernickel
- · Replies 13 ·
Torque; where to place axis (levers) question.
- CougarPride
- · Replies 1 ·
Magnetic force on a triangular current loop
- sfgoat
- · Replies 3 ·
What does highest possible kWh per dollar per person mean?
- Donna14
- · Replies 3 ·
Calculating magnetic force between two bar magnets
- Ascendant78
- · Replies 4 ·
Mass on string through ring with constant pulling velocity
- Radarithm
- · Replies 9 ·
Why is the restoring force for SHM of liquid in a U tube 2pAgx?
- coconut62
- · Replies 1 ·
Topspin for a tennis ball to not change velocity while bouncing
- mintsnapple
- · Replies 1 ·
Finding Center of Mass of a Nonuniform Bar
- chongkuan123
- · Replies 10 ·
How Does Coil Rotation Affect Magnetic Flux and EMF Generation?
- patrickmoloney
- · Replies 3 ·
Solve for v2Plutonium-239 Decay: Find Speed of Uranium-235
- negation
- · Replies 4 ·
What is the radius of the circular arc if the accelerating potential is tripled?
- googlyeyes
- · Replies 1 ·
Thermodynamics - change in internal energy of the system for the path
- Ronaldo95163
- · Replies 5 ·
Block Sliding Down Inclined Plane with Pulley and Friction
- sreya
- · Replies 5 ·
Energy and oscillations combined
- notabigfan
- · Replies 6 ·
Magnetic field due at a point due to a wire outlining an ellipse
- Duderonimous
- · Replies 1 ·
What is the Phase Constant in an Inelastic Collision with a Spring?
- notabigfan
- · Replies 8 ·
Angular momentum of time dependent particle motion
- Schulze
- · Replies 9 ·
Balancing a plank on springs (Torques)
- notabigfan
- · Replies 7 ·
Gravitational Acceleration given mass and radius
- EliteCodexer
- · Replies 3 ·
Current drawn by a motor operating at half speed
- BOAS
- · Replies 4 ·
Force of interaction between caps
- Saitama
- · Replies 34 ·
Zero Potential and Electric Intensity in a 2D Plane with 3 Point Charges
- Lucky7
- · Replies 4 ·
Oil drop experiment electron charge
- omega500
- · Replies 7 ·
Thermodynamics Cycle of Processes
- liamporter1702
- · Replies 2 ·
How Do Electric Fields Affect Electron Motion Between Charged Plates?
- patrickmoloney
- · Replies 4 ·
Hydrogen atom emitting a photon
- STJ
- · Replies 1 ·
Entropy of a mole of a crystalline solid as a function of temperature
- NobodyMinus
- · Replies 1 ·
Eccentrically hollow cylinder - Lagrangian (external forces)
- widelec
- · Replies 2 ·
How Is the Mass of the Top 3.2 Meters of the Ocean Calculated?
- Smazmbazm
- · Replies 6 ·
Drag Force - Air Resistance Question
- patrickmoloney
- · Replies 1 ·
How Does Inductance Affect DC Circuit Behavior?
- jimmy4
- · Replies 8 ·
Elastic potential energy of a hanging cone
- Saitama
- · Replies 16 ·
Find Current in RC Circuit w/ V=Vo Sin(ωt)
- TheEvenfall
- · Replies 2 ·
Block glued to a wall with downward tension force
- tmobilerocks
- · Replies 19 ·
Electric Potential of a Spherical Shell
- asap9993
- · Replies 6 ·
Mass suspended by two strings on revolving axle at 45°
- Radarithm
- · Replies 26 ·
Moment of inertia and magnetic moment of a circular coil
- besnik93
- · Replies 3 ·
Finding lens radius of curvature from Newton rings graph
- bondgirl007
- · Replies 3 ·
Find angular velocity given velocity of attached block
- grekin
- · Replies 1 ·
How Do Spring Constants Affect Harmonic Motion Periods and Frequencies?
- amasu
- · Replies 5 ·
Electric field intensity with a charge decreasing over time
- ForTheGreater
- · Replies 1 ·
Wave function in infinite square well, with potential step
- slasakai
- · Replies 1 ·
Finding currents in a three-resistor circuit with Kirchhoff's law
- sammblehh
- · Replies 2 ·
How do mass affect the acceleration of a pulley?
- boii
- · Replies 3 ·
How to Determine Focal Length and Power of Lenses for Farsightedness
- physicsztudent
- · Replies 1 ·
Magnetic Field between two plates
- Jgamita10
- · Replies 1 ·
Calculating Distance Given Work and Forces
- Natko
- · Replies 2 ·
Angular Acceleration of a Fixed Rod
- Schulze
- · Replies 11 ·
Calculating Bungee Cord Stretch: Mass, Length, and Stiffness Formula
- patrickmoloney
- · Replies 1 ·
Magnetic field and conducting rails
- BOAS
- · Replies 1 ·
Ball rotates around a shaft by two cords
- mackeis
- · Replies 3 ·
A block on a frictionless circular ramp
- killthelights1
- · Replies 5 ·
Magnetic field and energy between two repelling magnetized plates
- Jgamita10
- · Replies 1 ·
Two cars collide and fuse together
- killthelights1
- · Replies 1 ·
Maximum electron speed from photoelectric surface with 2V stopping voltage
- kas8
- · Replies 13 ·
What is the average power if the resistance R is doubled in an AC circuit?
- Coop
- · Replies 3 ·
Asteroid on course with planet problem
- jj975
- · Replies 1 ·
Finding capacitive reactance in an AC generator circuit
- Flop880
- · Replies 3 ·
What Is the Correct Prescription Power for Hyperopia to Read at 56.3 cm?
- blue_lilly
- · Replies 1 ·
Finding three currents with Kirchhoff's rules and two batteries
- navm1
- · Replies 7 ·
Quantitative observations of Pandora cluster
- rstein66
- · Replies 1 ·
Self Inductance of a Solenoid Problem
- liamporter1702
- · Replies 1 ·
Why do the two methods for dipole force give different results?
- physiks
- · Replies 7 ·
Two identical billiard balls on different tracks: which is faster?
- physicos
- · Replies 11 ·
Time the Earth requires to go towards Pluto?
- Theivax
- · Replies 2 ·
Lagrange qustion, a partilcle confined to a spherical cone
- mjmontgo
- · Replies 2 ·
Collision - a ball and string form a pendulum
- ron360
- · Replies 10 ·
Buoyancy, depth a block will sink in two different liquids
- TheKShaugh
- · Replies 16 ·
Can a shear force diagram be a function of applied load P?
- annas425
- · Replies 3 ·
Why does light refract twice in a silvered lens before hitting the mirror?
- dhtikna
- · Replies 2 ·
Conservation of energy/momentum
- alyssaxo
- · Replies 1 ·
What is the total mechanical energy of a particle falling on an extended string?
- Jessica8956
- · Replies 7 ·
What is the magnitude of the impulse
- alyssaxo
- · Replies 1 ·
What is the value of these angles ?
- yoxter
- · Replies 5 ·
Kinematics Question -- 2 Runners Racing Each Other
- yoyo16
- · Replies 2 ·
Arrow and target inelastic collision in perpendicular directions
- Engineering100
- · Replies 7 ·
Conservation of energy with a bungee jumper
- lordbolton
- · Replies 8 ·
Cylinder rolling inside a moving pipe
- CAF123
- · Replies 21 ·
Apparent weightlessness problem?
- toothpaste666
- · Replies 17 ·
What is the frequency of light with a wavelength of 7.245×10−7 m in glass?
- elitepro
- · Replies 1 ·
Solving Current in a Cell: Use I = V/R to Find 2/3
- calculator20
- · Replies 4 ·
Using stiffness matrix method to eliminate members and find forces
- MMCS
- · Replies 5 ·
Maximun power delivered to a resistor
- tadm123
- · Replies 6 ·
What are the non-zero moments for a pure dipole?
- moongate
- · Replies 1 ·
Why is the acceleration not equal to 9.81 m/s^2
- rexorsist
- · Replies 7 ·
Clarifying Torque, RPM, and Radius in Motor Dynamics
- SpaceLight
- · Replies 6 ·