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 Many Revolutions Does a Centrifuge Make in 240 Seconds?
- physicsma1391
- · Replies 1 ·
Temperature Question (answ=neg#-?)
- grantP
- · Replies 4 ·
Vehicle safety features question
- Chemist33
- · Replies 1 ·
What is the relationship between voltage and resistance in a circuit?
- mino206
- · Replies 5 ·
Hit the Monkey? Prove it with Algebra and Physics
- agni365
- · Replies 11 ·
Determining Impact Time of a Ball given Launch Velocity
- rocomath
- · Replies 1 ·
Solve Homogeneous Ladder Problem - Max Height Reachable
- madahmad1
- · Replies 6 ·
Is This Approach to Solving Wrench Reduction Correct?
- Saladsamurai
- · Replies 2 ·
Calculating Change in Entropy: 1.124J Heat Added to Gas at 300K [Solved]
- boburd21
- · Replies 5 ·
What Determines the Validity of Modeling a Wire as a Line of Charge?
- liathano
- · Replies 3 ·
Is the Force on Box A Correctly Calculated?
- Precursor
- · Replies 2 ·
How Do You Convert Linear Momentum to Angular Momentum?
- foxjwill
- · Replies 1 ·
Calculate p and q for Multiplying Vectors
- rocomath
- · Replies 4 ·
Voltage Drop Across Indicator Lamp
- Lhawx
- · Replies 1 ·
Graphing a quantitatively accurate v vs. t
- Johny 5
- · Replies 2 ·
How Do You Calculate Final Velocities in a Spring-Mass System?
- getupforletdo
- · Replies 2 ·
Calculate Energy Loss from Parachutist Jump
- petern
- · Replies 7 ·
How to Calculate Heat Required to Double Internal Energy of Helium Gas?
- boburd21
- · Replies 7 ·
Drum angular acceleration, train deceleration, and bullet collision problems
- madahmad1
- · Replies 1 ·
Frequency of Vibration for a Block Supported by Two Springs
- Big-J
- · Replies 2 ·
Understanding Parallel Force: Definition, Equation, and Examples
- BrooklynBees
- · Replies 3 ·
What is the final charge on sphere 2?
- soccerj17
- · Replies 4 ·
Acceleration of gravity at pendulum
- Aamun
- · Replies 5 ·
Solving for Seesaw Balance: Mass and Distance Relationship
- BrooklynBees
- · Replies 4 ·
How Is Delta-V Calculated for De-orbit Maneuvers?
- davo
- · Replies 1 ·
Thermo Problem Get the Answer Now
- plmokn2
- · Replies 1 ·
Why don't action-reaction forces cancel in Newton's third law?
- nosecs411
- · Replies 1 ·
Why Are Rubbed Plastic Pieces Attracted to Each Other?
- fiziksfun
- · Replies 1 ·
Electricity and revolutions per second
- abeltyukov
- · Replies 4 ·
Kinetic and Potential Energy of Falling Objects
- submar1ney
- · Replies 10 ·
I think the Geometry is what is getting me
- Saladsamurai
- · Replies 8 ·
Acceleration and tension for 20 kg and 30 kg masses on a 30° incline
- madahmad1
- · Replies 1 ·
How Does the Coriolis Force Affect a Northbound Plane's Flight Path?
- karnten07
- · Replies 1 ·
Physical pendulum with air friction
- congman
- · Replies 7 ·
How much energy is released in the explosion?
- Joza
- · Replies 9 ·
How Does a Sphere's Speed Affect Its Climb on an Incline?
- madahmad1
- · Replies 1 ·
Kinetic Energy at 120 mph: Find Your Answer Here
- samsam
- · Replies 4 ·
Minimum Work for Pulling and Pushing
- mrlucky0
- · Replies 9 ·
Electron Proton Collisions and Electron Capture
- nokia8650
- · Replies 1 ·
Excitation of an electron by a photon
- nokia8650
- · Replies 2 ·
How Can We Prove the Time Period Formula of a Simple Pendulum?
- Michaelcarson11
- · Replies 1 ·
What is the velocity of the bullet at impact with the wooden block?
- rabar789
- · Replies 6 ·
Block held against wall with horizontal force
- physixguru
- · Replies 3 ·
What Is the Initial Velocity Angle of a Projectile at 75% of Its Maximum Height?
- rejz55
- · Replies 5 ·
How to treat BULBS in circuits?
- lollol
- · Replies 10 ·
What is the resultant force direction?
- JLPhysics
- · Replies 3 ·
How to Calculate Velocity and Time in a Particle's Motion Along the x-Axis?
- physixguru
- · Replies 2 ·
Magnetic force on power line carrying 110 A in Earth's field
- physicsed
- · Replies 2 ·
Finding when a projectile hits the ground from initial speed and height
- Sophialiu609
- · Replies 17 ·
What is the location of the second and third water drops in a falling shower?
- rocomath
- · Replies 5 ·
How Do You Solve Kinematics Problems Involving Movement and Acceleration?
- vertciel
- · Replies 8 ·
Solving Work Energy Problems: Calculating Distance Using Friction and Velocity
- micaele
- · Replies 17 ·
Center of gravity of a uniform board with a centered circular hole
- Izzybee
- · Replies 4 ·
Number of photons emited physics 30
- cathoderay
- · Replies 11 ·
How Is Tension Calculated in Tarzan's Rope Swing?
- petern
- · Replies 17 ·
Greatest acceleration for 10kg package before rope breaks
- MoreZitiPlease
- · Replies 3 ·
Solving a Ladder Problem: Finding Max Tension in a Rope
- Clipse
- · Replies 3 ·
How Do You Convert Forces into a Wrench in Vector Mechanics?
- Saladsamurai
- · Replies 1 ·
Solving Momentum Collision Problems
- Ginerva123
- · Replies 1 ·
Finding equivalent resistance and voltmeter effects in circuit
- rock.freak667
- · Replies 1 ·
Calculating Proton's Closest Approach to a Line of Charge
- totalmajor
- · Replies 2 ·
Some of my Winter Break physics problems
- totalmajor
- · Replies 11 ·
How Do Fluid Forces Affect a Swimming Pool's Structure?
- jenha14
- · Replies 1 ·
Open loop gain of an operational amplifier
- fickle
- · Replies 1 ·
Where can I find the centre of mass in a 3D co-ordinate system?
- smriti
- · Replies 3 ·
A block hits a patch of friction
- stormgren
- · Replies 6 ·
Rotational Motion (Inclined Plane)
- Izzybee
- · Replies 6 ·
How Do You Solve These Physics Problems on Motion and Vectors?
- alksjadf
- · Replies 3 ·
Equilibrium Ball attached to wall problem
- brendan3eb
- · Replies 2 ·
Sun's height above horizon as function of time formula
- Irid
- · Replies 9 ·
Simple Harmonic Motion of a body
- v_pino
- · Replies 1 ·
What Would Happen if Mass Was Negative?
- Sane
- · Replies 10 ·
How Fast Must a Bullet Travel to Swing a Pendulum Bob Through a Complete Circle?
- jigs90
- · Replies 5 ·
Relating deviation angle to incident angle and refractive index
- kimaru08
- · Replies 6 ·
Work to move charged box up 30 degree ramp
- fatcat39
- · Replies 3 ·
Checking answers for torque, seesaw balance, and machine work
- BunsenBurner1
- · Replies 8 ·
Maximum angle for insect crawling on hemispherical shell with friction
- physixguru
- · Replies 4 ·
Why Is Light Not Refracted at the Planar Edge of a Planoconvex Lens?
- slakedlime
- · Replies 10 ·
How do I rearrange the radioactive decay equation to solve for time?
- timothy123
- · Replies 3 ·
Finding the third force given two forces and their resultant
- rejz55
- · Replies 8 ·
Refraction through glass sphere with liquid and silvered thick lens
- zimrock
- · Replies 2 ·
Misconceptions in Calculating Power Dissipation in Electrical Circuits
- Gunman
- · Replies 3 ·
Calculating Coefficient of Friction on Incline Pulled at Constant Velocity
- BunsenBurner1
- · Replies 8 ·
Absolute pressure at an ocean depth
- jenha14
- · Replies 1 ·
Find the radius of each circular path
- Canuck269
- · Replies 1 ·
Initial angular acceleration of a horizontal rod pivoted at one end
- Gear300
- · Replies 10 ·
Reduction of resultant Moment/Force
- Saladsamurai
- · Replies 1 ·
How Does Water Affect the Weight of a Submerged Aluminum Plate?
- autoguy
- · Replies 3 ·
Electric field from 24 charges on a circle in the y-z plane
- fatcat39
- · Replies 16 ·
Can You Determine the Volume or Mass of a Submerged Cube Using a Scale?
- nonequilibrium
- · Replies 12 ·
I don't understand why that is correct.
- rejz55
- · Replies 3 ·
Finding momentum of a ball halfway to maximum height
- mortho
- · Replies 17 ·
Find Field and Direction in Coaxial Coils
- Canuck269
- · Replies 2 ·
Static vs kinetic friction coefficients and surface roughness
- desichick07
- · Replies 1 ·
Acceleration of Block on an Apparatus
- mrlucky0
- · Replies 22 ·
What is the acceleration of a girl on a skateboard throwing a bowling ball?
- MoreZitiPlease
- · Replies 9 ·
Theoretical Question: Is W = PE?
- Goldenwind
- · Replies 2 ·
Conservation of Energy softball pitcher
- nickhassan38
- · Replies 3 ·
Momentum of a 0.14 kg ball of dough thrown up at 24 m/s
- mortho
- · Replies 3 ·
Calculating Force from Pole-Vaulter's Fall onto Foam-Rubber Pad
- mortho
- · Replies 3 ·