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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Superpositions of electrostatic forces
- raindrops
- · Replies 2 ·
Calorimetry Problem: Cooling 90.0 g of Iron in 85.0 g of Water
- sdoug041
- · Replies 5 ·
Bouncing ball and angular velocity
- sting10
- · Replies 12 ·
Two boxes connected by rope over pulley with friction
- physics102
- · Replies 1 ·
Pain Threshold - Reducing Intensity
- 05holtel
- · Replies 1 ·
How to simplify a fraction with a square root in the numerator?
- elie_girl
- · Replies 8 ·
What Angle Minimizes Force to Make a Block Slip?
- atarr3
- · Replies 4 ·
Boltzman Constant, Emissivity and Surface Area of a filament
- kavamo
- · Replies 1 ·
Why is F(tang) equal to -dU/ds?
- Oijl
- · Replies 2 ·
Angular acceleration of a motor
- Dangousity
- · Replies 2 ·
Can a position vs time graph be perfectly horizontal or vertical?
- caseyd1981
- · Replies 3 ·
How long ago did the wooly mammoth disappear from North America?
- chawkdee
- · Replies 3 ·
How Do You Prove These Trigonometric Identities?
- Cutie123
- · Replies 1 ·
How Deep Will a Less Dense Ball Sink in Water?
- modulus
- · Replies 2 ·
General Thermal/Energy Physics Problem
- Timiop2008
- · Replies 1 ·
Point charges and potential electric energy
- Torquescrew
- · Replies 2 ·
Calculating Speed of a Point on a Rolling Wheel
- kppc1407
- · Replies 24 ·
How Do You Calculate the Parallel and Perpendicular Components of a Vector?
- hadroneater
- · Replies 1 ·
What is the magnitude of the charge on each particles
- shimizua
- · Replies 1 ·
Find the temperature of air given frequency and wavelength?
- miamirulz29
- · Replies 5 ·
What is the initial projection angle of the projectile?
- batman11692003
- · Replies 3 ·
How Do You Calculate Arc Length and Average Speed with Significant Figures?
- Judas543
- · Replies 2 ·
TA 2019 Physics 1 Question 5: Geosynchronous Orbit
- kppc1407
- · Replies 2 ·
Cannon Angle for Avalanche Initiation?
- saber1357
- · Replies 14 ·
How Is Force Calculated on a Plate Stopping Water in a Pipe?
- azure kitsune
- · Replies 1 ·
Force on electron near charged person using Coulomb's law
- shimizua
- · Replies 6 ·
Bernoulli's Equation for Pressure Drop in a Constricted Venturi Tube
- wrongusername
- · Replies 3 ·
What is the the electric field at a point midway between
- shimizua
- · Replies 6 ·
Projectile motion football kick problem
- Cherrybawls
- · Replies 3 ·
What is the radius of Mercury's core?
- Katte
- · Replies 9 ·
How Does a Capacitor Behave in a Simple Circuit?
- Timiop2008
- · Replies 1 ·
What is the frequency of a tuning fork oscillating at 2770 rad/s?
- Timiop2008
- · Replies 1 ·
Why does the dot product use cosine?
- cdotter
- · Replies 2 ·
How Fast Must the Car Travel in the Second Half to Average 51 km/h?
- mike5754
- · Replies 4 ·
Determining Wavelength of Most Intense Electromagnetic Radiation at 2500.1 °C
- XBOX999
- · Replies 1 ·
What is the magnitude of the electric field
- shimizua
- · Replies 4 ·
What Mass Should Be Used in Joule's Experiment to Deliver 1.00 kcal?
- kavamo
- · Replies 3 ·
Time Period: Limits of Integration?
- particlemania
- · Replies 2 ·
Creating a Function with Oscillating Discontinuity
- sbmarie23
- · Replies 10 ·
Average velocity (should be easy )
- mybrohshi5
- · Replies 2 ·
10 kg block sliding on floor with friction: find KE, PE and speed after 2 m
- bradefeld
- · Replies 3 ·
Provincial Exam: Simple momentum explosion question
- Senjai
- · Replies 1 ·
What is the mass of the Earth's atmosphere?
- wrongusername
- · Replies 2 ·
What Are Some Tips for Preparing for a Science Fair Project in One Week?
- Alieneater
- · Replies 1 ·
What do the axes represent on a time dilation graph?
- nicekarmajobs
- · Replies 1 ·
Ladder leaning against the wall, that we dont want to fall down
- hellbike
- · Replies 1 ·
What Happens to a Ball Dropped Through the Center of the Earth?
- fondah
- · Replies 7 ·
Why does the energy formula work but the kinematic equation doesn't for max height?
- majormuss
- · Replies 2 ·
Solve the Circuit For Electromagnetism Unit
- madeeeeee
- · Replies 10 ·
Confusing Old time Measurements =(
- Teenytiny1991
- · Replies 4 ·
Solving Acceleration and Velocity Problems in the xy Plane
- dragonladies1
- · Replies 3 ·
Impossible tHERMODYNAMICS Problem
- od943
- · Replies 1 ·
Eddy Currents in Magnetic Fields: Copper/Aluminum vs Iron
- ananthu
- · Replies 2 ·
Velocity of the Moon (magnitude and direction)
- corykowa
- · Replies 6 ·
What is the relationship between sound intensity level and power?
- LeakyFrog
- · Replies 2 ·
Kinematics Plane and Rocket Problem
- majorazero
- · Replies 2 ·
What angle should the curve be banked at?
- TheConfewsd
- · Replies 2 ·
Find components of vector C from vectors A and B
- casemeister06
- · Replies 2 ·
Atmospheric density calculation (of mars)
- blackdog666
- · Replies 6 ·
Beat FrequencyWhat is the new tension in the string that slipped?
- r_swayze
- · Replies 1 ·
Tracking an Electron Through an Electric Field
- vucollegeguy
- · Replies 1 ·
2008 AP Physics B Free Response MISTAKE?
- GreenPrint
- · Replies 2 ·
An Object is in Uniform Circular Motion
- lampshader
- · Replies 6 ·
Cost of running an 1800 W oven for 7 hours
- r1ch412d
- · Replies 1 ·
Person B on elevator vs person A walking 50 m
- songoku
- · Replies 4 ·
Can someone help with these problems?
- tintin
- · Replies 4 ·
Box sliding on incline with friction
- Stuck/:
- · Replies 1 ·
Average speed for round trip up and down a hill
- IronBrain
- · Replies 7 ·
Rotational Kinematics - Angular velocity
- nahanksh
- · Replies 2 ·
Finding the angle of vector sum V1 + V2
- matt72lsu
- · Replies 7 ·
What are the forces acting on point B in the crane diagram?
- Peto
- · Replies 2 ·
Thermal Expansion of a hemisphere
- Samonasuke
- · Replies 2 ·
How Do You Calculate Collision Rates and Emission Wavelengths in Physics?
- XBOX999
- · Replies 2 ·
How Do You Calculate Sound Speed and Tune a Guitar with a Tuning Fork?
- madeeeeee
- · Replies 13 ·
Scalar or Vector: How to Classify Important Quantities in Scientific Research?
- Paymemoney
- · Replies 1 ·
Net Force on Center Charge of Four Point Charges
- surferdud3
- · Replies 1 ·
Electric force magnitude of NH3
- EV33
- · Replies 1 ·
Coulomb's Law/Electric field questions
- krtica
- · Replies 3 ·
How Does the Angle of a Simple Pendulum Affect Its Torque?
- Kiko:)
- · Replies 1 ·
Vectors (incl. axial/psuedovectors)/Scalars
- bon
- · Replies 9 ·
Calculate the Force of a Certain Push
- Darkstr958
- · Replies 1 ·
Car braking distance with constant deceleration
- anastasiaw
- · Replies 5 ·
Calculate the mass of particle 2
- shimizua
- · Replies 1 ·
Newton’s law of universal gravitation
- Ahmad786
- · Replies 3 ·
Conservation of momentum - Brakes
- TSail
- · Replies 2 ·
Model rocket with constant acceleration and lighthouse distance problem
- jwang023
- · Replies 2 ·
What does magnitude and direction of vectors mean?
- Player7900
- · Replies 6 ·
How Much Force Is Needed to Move a 1960 N Block of Dry Ice?
- Ahmad786
- · Replies 1 ·
Collisions in an Elastic System: Solving for Motion and Energy Loss
- nihaokailan
- · Replies 1 ·
Applying Newtons Second Law to Vertical Motion
- Ahmad786
- · Replies 3 ·
Weight of 10 kg Mass on Moon: 60N
- Ahmad786
- · Replies 1 ·
Two masses are connected by a string and pulled along a frictionless surface by anoth
- Ahmad786
- · Replies 1 ·
What is Newton's First Law of Motion?
- Ahmad786
- · Replies 1 ·
Calculating Work Against Gravity for Orbital Launch
- sour_lemon_1k
- · Replies 4 ·
Paraxial approximation on concave mirror
- zicron
- · Replies 7 ·
Determining the Internal Resistance of Battery X
- songoku
- · Replies 10 ·
What exactly is current, and how come it is constant in a circuit?
- rhfish
- · Replies 5 ·
How far from camera person should stand?
- agentas
- · Replies 6 ·
Calculating Mass from Weight and Distance
- majormuss
- · Replies 1 ·
Calculate radius of earth using a pole
- Mk
- · Replies 5 ·