Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
MCQ: Potentiometer: Balanced Length, Resistance of Cell E
- leena19
- · Replies 6 ·
What is the Effect of Dimpled Surfaces on Rolling Friction?
- Meggett
- · Replies 12 ·
Harmonic Function (time averages) II
- jeff1evesque
- · Replies 1 ·
Refrigerator power rating and heat absorption
- nrweis
- · Replies 4 ·
Train climbing 5 km track with 40 m rise: work-energy equation
- ln85
- · Replies 1 ·
Friction and tension force- mass
- Paulbird20
- · Replies 3 ·
What is the Contribution of Segments AB and CD to the Magnetic Field at Point O?
- peaceandlove
- · Replies 1 ·
The electric potential difference created by point charges.
- xkelleh
- · Replies 2 ·
Energy lost when reconnecting charged capacitors with opposite polarities
- wcelectric
- · Replies 7 ·
Getting an intuitive feel for pressure in psi and pascals
- madhuresh
- · Replies 6 ·
Optical Instruments I: Optical Element
- OsDaJu
- · Replies 3 ·
Stocke's law and terminal velocity
- leena19
- · Replies 17 ·
Finding Average Velocity between .7 m/s and -1.25 m/s
- Petrucciowns
- · Replies 5 ·
Skiers on Different Sloped Hills?
- imaweinerz
- · Replies 4 ·
What is the difference between velocity and displacement?
- Physlithium
- · Replies 2 ·
Calculating Time to Heat Earth to 100°C
- djk628
- · Replies 1 ·
Plane mirror size and height for seeing your whole body
- Voltman
- · Replies 1 ·
Potential difference between bird's feet on transmission line
- bishoy
- · Replies 10 ·
Changing temperature of falling bodies
- djk628
- · Replies 5 ·
Error Checking Single Slit Diffraction Equation for Bright Lines
- donotremember
- · Replies 1 ·
Is Temperature Constant in a Pressure-Volume Graph?
- intenzxboi
- · Replies 1 ·
Calculating the Center of Mass of an Arc
- RoyalCat
- · Replies 2 ·
Electric Flux on a Cylindrical Gauss Surface
- exitwound
- · Replies 5 ·
Harmonic Function (time averages)
- jeff1evesque
- · Replies 6 ·
Average force in stopping a block
- ride4life
- · Replies 16 ·
Calculating droplet mass and charge in Millikan oil drop experiment
- Matt1234
- · Replies 2 ·
Earth Without Oceans: Why It Would No Longer Be a Sphere
- monty37
- · Replies 3 ·
Heat Transferred to 8,000-kg Aluminum Flagpole
- intenzxboi
- · Replies 2 ·
Capacitor with radius finding the energy density
- sonrie
- · Replies 4 ·
Does a constant volume and pressure change result in zero work done by a gas?
- intenzxboi
- · Replies 1 ·
What is the change in temperature of a coin dropped from a building?
- intenzxboi
- · Replies 12 ·
What Does the Scale Read at Its Peak When You Jump from 1.3m?
- kavipach
- · Replies 4 ·
A Sphere rolling down an incline. Find the speed at the bottom
- kavipach
- · Replies 2 ·
Tension in vertical and horizontal ropes supporting an 800 kg mass
- Shortyyy
- · Replies 18 ·
E-Field over Uniformly Charged Disc
- exitwound
- · Replies 9 ·
How Do You Calculate Force and Tension in a Pulley System?
- Apprentice123
- · Replies 31 ·
Challenging problem about puck revolving on a table
- go_ducks
- · Replies 6 ·
RC circuit: find charge after 5.122 ms
- peaceandlove
- · Replies 4 ·
How Do You Calculate the Cost of Running a Steam Iron?
- peaceandlove
- · Replies 4 ·
Gravitation, really hard at least for me
- Puchinita5
- · Replies 3 ·
Judging the Kite-Flying Contest: Measuring String Tensions
- blackboy
- · Replies 2 ·
What are the velocity components after an inelastic collision in 2D?
- corvus606
- · Replies 4 ·
Calculating Electric Potential Energy of an Electron in a Fixed Proton System
- talaroue
- · Replies 8 ·
Calculating Final Pressure of Gas Mixture in Two Identical Containers
- gladius999
- · Replies 17 ·
Angular Momentum: Mass Rotating About a Post
- Sam_Goldberg
- · Replies 3 ·
Bathroom scale being compressed but jumping on it
- kavipach
- · Replies 13 ·
How much gas is required to heat a house
- Dyna
- · Replies 5 ·
Why is Permittivity ε Multiplied and Not Summed?
- jeff1evesque
- · Replies 2 ·
Galileo's Theory of falling bodies problem
- Ki-nana18
- · Replies 2 ·
What is the force applied by water on a falling sandbag?
- dance_sg
- · Replies 6 ·
How Does Relative Permittivity Relate to the Electric Field in Capacitors?
- jeff1evesque
- · Replies 3 ·
Friction problem of playground slide
- pttest
- · Replies 4 ·
Permittivity (background reading from Wikipedia)
- jeff1evesque
- · Replies 6 ·
Gravitational Energy transfered to Kinetic question
- rayfish
- · Replies 8 ·
What is the study of motion called?
- Ki-nana18
- · Replies 2 ·
How does changing force and mass affect acceleration on a lab cart?
- dance_sg
- · Replies 9 ·
Power dissapatied by a resistor
- talaroue
- · Replies 2 ·
Calculating Average Net Force on a Car Acceleration
- dance_sg
- · Replies 5 ·
How to differentiate between single and multiloop circuits
- novafx
- · Replies 6 ·
Determine Work done on the puck?
- jumpingjack90
- · Replies 5 ·
Finding push force to accelerate a block at 5.71 m/s² with kinetic friction
- Paulbird20
- · Replies 10 ·
Distance traveled at end of second interval: 27m
- Ki-nana18
- · Replies 2 ·
What is the solution to the Power-Truck Problem in physics?
- Chewy0087
- · Replies 7 ·
What is the energy equation for a damped pendulum?
- Roboticist
- · Replies 15 ·
Photoelectric effect :Millikan experiment
- pepe1964
- · Replies 7 ·
What is the Speed of the Incoming Sphere After a Perfectly Elastic Collision?
- Nguyenfa.t
- · Replies 19 ·
Gravitation, hollowed out sphere
- Puchinita5
- · Replies 1 ·
Magnetic Field from Sheets of Current
- typeinnocent
- · Replies 1 ·
Solving Friction Force and Acceleration Problems
- pttest
- · Replies 1 ·
Block on an incline with Friction
- love2dream89
- · Replies 1 ·
Projectile Motion, requiring variable elimination
- Lukapaka
- · Replies 6 ·
Calculating Eraser's Distance on Friction Desk
- Matt1234
- · Replies 1 ·
Calculating Change in Internal Energy: A Steam Engine's Performance
- jmb07
- · Replies 4 ·
Force on square loop in non-uniform field (Griffiths 5.4)
- astropi
- · Replies 6 ·
Calculating Power Factor for an RC Circuit with Given R, C, and Frequency
- just.karl
- · Replies 12 ·
Mass of an object up inclined plain
- Paulbird20
- · Replies 2 ·
Suitcase dropped from airplane at 90 m/s: where does it land?
- alex2256
- · Replies 1 ·
True/false Freshman Undergrad Physics Problems (Work)
- TwinGemini14
- · Replies 9 ·
Spring constant for exercise equipment delivery ramp with friction
- Brainsplosion
- · Replies 2 ·
How can work have units of volts?
- jeff1evesque
- · Replies 12 ·
Where do the √3Q and 2L² come from in this charge equation?
- tchounkovskii
- · Replies 2 ·
Finding velocity and displacement with gravity
- kahya
- · Replies 13 ·
What is the ratio of radii for the two species X+ and X2+?
- KatieD
- · Replies 5 ·
Calculating the period of a pendulum
- dummybbmm
- · Replies 2 ·
How Does Changing the Radius Affect Angular Speed and Kinetic Energy?
- balling12
- · Replies 2 ·
Trouble Writing Transfer Function for Mass-Spring-Damper System
- majin_andrew
- · Replies 2 ·
Static equilibrium and tension problem
- Puchinita5
- · Replies 5 ·
Kinematics (distance, speed, velocity, acceleration)
- pttest
- · Replies 3 ·
Some subtleties regarding Impedance
- Oren Becker
- · Replies 2 ·
Magnitude of force of box on ramp.
- BitXBit
- · Replies 16 ·
Solving the Liquid Density Puzzle
- Chewy0087
- · Replies 4 ·
How can I improve my approach to solving physics problems?
- coco87
- · Replies 3 ·
AC Power and Combining Volt/Current
- elink24
- · Replies 6 ·
Capacitor Applications: Filtering out AC and DC Signals
- jeff1evesque
- · Replies 5 ·
Electron deflected between parallel plates EF and GH
- leena19
- · Replies 7 ·
What is the angular momentum of the system after the collision?
- shangri-la89
- · Replies 1 ·
Copper Pipe Expansion: 2.5m Length Rise to 86.5°C
- tag16
- · Replies 2 ·
Two objects moving away from eachother at c - Special relativity
- vorcil
- · Replies 3 ·
Momentum and stopping distance
- test2morrow
- · Replies 3 ·
Block is lowered into water, what is weight of water spilled?
- test2morrow
- · Replies 4 ·