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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How does the radius of a star affect the temperature of a planet orbiting it?
- FunkyDwarf
- · Replies 2 ·
Spring and friction assignment
- kar_04
- · Replies 1 ·
Using Right Hand Rule & Lorentz Force Law to Find Electric Field Direction
- grscott_2000
- · Replies 1 ·
Vector addition - Finding V2 when V1 and V1+V2 are given
- exi
- · Replies 6 ·
Calculating Planck's constant from LED experiment.
- Checkfate
- · Replies 1 ·
Exploring Bohr's Model: Understanding Electron Emission in Hydrogen Atoms
- shanktank
- · Replies 11 ·
AC vs DC current Tesla vs Edison
- shanktank
- · Replies 7 ·
Electromagnatism - Find charge deos this sphere have
- uniidiot
- · Replies 11 ·
Pushing object up incline - no friction
- curiousgeorge99
- · Replies 8 ·
Solve Centripetal Acceleration at 0.050m from CD-ROM Center
- scw287
- · Replies 12 ·
Does Terminal Velocity Affect Electrons in Magnetic Fields?
- The_Teacher
- · Replies 4 ·
Orientation Q: Plane Wave Propagation in Air
- WolfOfTheSteps
- · Replies 1 ·
Calculating String Tension in Rotational Motion: m, r, v0, g
- eyehategod
- · Replies 4 ·
Understanding the Relationship of n=Sine i/Sin r for Waves and Light Homework
- raman911
- · Replies 4 ·
Calculating Maximum Velocity of a Pendulum with Given Length and Amplitude
- Soley101
- · Replies 13 ·
Can I get the archive of all the past questions that have asked so far?
- rootX
- · Replies 4 ·
What Time Do Clock Hands Align After 2:00 PM?
- MJC8719
- · Replies 8 ·
How Do You Calculate Velocity from Kinetic Energy?
- curiousgeorge99
- · Replies 2 ·
Magnitude of the change in momentum
- t_n_p
- · Replies 7 ·
Finding Direction of Boat Movement: Bearing Calculation
- Lavace
- · Replies 2 ·
Can someone help me figure this out?
- curiousgeorge99
- · Replies 13 ·
Negative support reaction? (Statics)
- asucho3
- · Replies 2 ·
Someone me with this problem, I am stuck
- astudentinneed
- · Replies 2 ·
Understanding Escape Velocity and Gravitational Potential Fields
- perfectz
- · Replies 10 ·
Focal length calculation and graph Q
- _Greg_
- · Replies 3 ·
How Do You Calculate Displacement in Vector Kinematics?
- Tiplerfan
- · Replies 1 ·
At what time does the motorcycle overtake the car?
- t_n_p
- · Replies 4 ·
Magnetic force: conservative or not?
- loom91
- · Replies 9 ·
Another Merry Go Round Question
- MJC8719
- · Replies 2 ·
Real Question This Time about a Merry go Round
- MJC8719
- · Replies 3 ·
Different subsidiary notes with varying amplitudes
- ritwik06
- · Replies 3 ·
Finding the Critical Angle: Diamond and Water
- AlanxD
- · Replies 7 ·
Which Class Do These Levers Belong To?
- ritwik06
- · Replies 4 ·
Calorimetry homework: mixing steam and liquid water
- ritwik06
- · Replies 6 ·
Comparing Inertia of a Disk and Ring on an Incline: Which Reaches the Top First?
- eyehategod
- · Replies 2 ·
Turntable rotation rate Problem
- BMWPower06
- · Replies 3 ·
Quick Question about Rotational Energy
- MJC8719
- · Replies 1 ·
How can I set up two 1500 W speakers in a ballroom without losing power?
- 21385
- · Replies 1 ·
How to Calculate Torques Using Tension and Force Components?
- t_n_p
- · Replies 6 ·
Vertical Motion under Gravity Q)
- Lavace
- · Replies 1 ·
Sliding Down a Spherical Surface
- Paul_Bunyan
- · Replies 4 ·
Can Old Handouts Effectively Prepare You for Physics Tests?
- blaziken's_charizard
- · Replies 11 ·
How Long is a Ball Thrown Upwards 3m Above Ground?
- Lavace
- · Replies 1 ·
Calculating Magnetic Field at Point P
- cuppy
- · Replies 1 ·
Solving Magnitude of Charge Problem with Coulomb's Law
- bidhati
- · Replies 4 ·
Calculating Launch Angle of Rock from Catapult on a Cliff
- BMWPower06
- · Replies 3 ·
Help are any of these even correct?
- cuppy
- · Replies 3 ·
How much heat energy is needed to operate a metromelt for one hour?
- AlanxD
- · Replies 8 ·
Potential Energy: Balance of Gravitational & Electrostatic Energies
- benedwards2020
- · Replies 1 ·
Trajectory of projectile with friction in air
- chaoseverlasting
- · Replies 7 ·
Moment of inertia, when a velocity of ball triples?
- rcmango
- · Replies 3 ·
How can Bernoulli's equation be applied to pitot-static tubes?
- adamlep14
- · Replies 5 ·
Statics problem: finding forces on symmetric supports due to beam
- Signifier
- · Replies 11 ·
Where is the Least Net Force on a Roller Coaster Going Through a Vertical Loop?
- rcmango
- · Replies 2 ·
Understanding Car Motion: Potential and Kinetic Energy on an Uphill Slope
- rcmango
- · Replies 1 ·
Can Oxygen Pass Through Water in a Suspended Tank?
- Idea04
- · Replies 3 ·
Effective resistance between A and B
- ritwik06
- · Replies 13 ·
Solving Planetary Motion Homework: Showing v=sqrt(2G (M+m)/d)
- Zeth
- · Replies 1 ·
What is the centripetal acceleration of the Earth in its orbit around the Sun?
- curiousgeorge99
- · Replies 6 ·
Electrostatic and Gravitational Forces
- grscott_2000
- · Replies 6 ·
Electric Charges (Quick Question)
- Fusilli_Jerry89
- · Replies 6 ·
Analyzing First Order Transient Circuits Using Differential Equations
- RadiationX
- · Replies 4 ·
Force and Energy Homework: Solving for Weight and Horizontal Force | Physics"
- raman911
- · Replies 5 ·
When can the gravitational potential energy be zero?
- BMWPower06
- · Replies 12 ·
How Can You Determine an Unknown Resistor's Value with Limited Tools?
- chenny
- · Replies 6 ·
Solving Angular Rotation Homework: Question b, c & d
- ataglance05
- · Replies 1 ·
Calculate Projectile Velocity: Magnitude & Direction
- scw287
- · Replies 8 ·
One-Dimensional Gravitational Motion
- BMWPower06
- · Replies 4 ·
Solve Polar Moment of Inertia for Thin Plate in 1st Quadrant
- king imran
- · Replies 7 ·
Elevator Weight and Acceleration
- BMWPower06
- · Replies 3 ·
Integration (displacement or position)
- kieran1black2
- · Replies 2 ·
Estimating Jet Speed Using Sound and Light
- DANIELLYMA
- · Replies 5 ·
Solving for Minimum Camera Speed to Reach Passenger
- BMWPower06
- · Replies 14 ·
Who's Right in Force Problem: Jeep vs Tractor
- Zeth
- · Replies 2 ·
Calculating Angular Acceleration of a Rotating Door
- MJC8719
- · Replies 3 ·
Bird Watcher's Displacement and Velocity
- scw287
- · Replies 28 ·
Calculating Projectile Velocity to Clear 11m Wall
- scw287
- · Replies 18 ·
Charge on 7 mF Capacitor Connected to 1 V Battery
- GravityGirl
- · Replies 2 ·
How do I calculate the elastic potential energy stored in a spring?
- lilmul123
- · Replies 3 ·
Electric Charge Problem - Book error?
- PFStudent
- · Replies 1 ·
Icebergs Melting: Impact on Water Levels
- eyehategod
- · Replies 16 ·
Is torque required to change angular momentum?
- eyehategod
- · Replies 2 ·
How Do You Calculate the Focal Length of a Lens for a Projector?
- ad-one
- · Replies 1 ·
Three Unknown Resistances: Solving for Unknowns in a System of Equations
- flash
- · Replies 2 ·
Use the formula for Final velocity
- Morgan89
- · Replies 11 ·
Calculating Distance Traveled by Sam on Jet-Powered Skis
- powderchick81
- · Replies 3 ·
Kinematics in two Dimension- projectile motion
- minx1004
- · Replies 10 ·
Planetary Motion - Energy Totals and Binding Energy
- quarklet
- · Replies 5 ·
Maximizing Speed in Simple Harmonic Motion | SHM Homework Solution
- recklessid
- · Replies 1 ·
Spring constant and stiffness constant
- janice778
- · Replies 13 ·
Finding instantaneous velocity at given points on nonlinear graph
- exi
- · Replies 7 ·
Calculating the Frequency of a Car Horn Using the Doppler Effect
- Morgan89
- · Replies 5 ·
Maximal static friction problem
- Black Riven
- · Replies 4 ·
Help with a Hydrogen Fuel cell presentation
- Plasma
- · Replies 3 ·
Flywheel of a steam engine problem
- Paged
- · Replies 2 ·
Calculate the mangitude and direction of the force
- raman911
- · Replies 4 ·
Maximizing Height and Final Velocity on a Tilted Rough Surface
- hastings
- · Replies 2 ·
High Jump Physics: Leaping 1.55m with 0.70m/s Speed
- Morgan89
- · Replies 2 ·
Help with History of Science Exam Question
- kingwinner
- · Replies 6 ·
Particles under constant acceleration
- Aerosion
- · Replies 2 ·