Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Finding the Angle Between Two Charged Spheres Using Coulomb's Law
- seto6
- · Replies 1 ·
Can torque only be caused by a force couple?
- Voliminal
- · Replies 3 ·
Calculate Power Needed for Conveyor Belt System
- tehipwn
- · Replies 1 ·
Magnetism (determining the magnetic field)
- jojo14
- · Replies 1 ·
How Do I Calculate Energy Changes in Thermodynamics Problems?
- Roro312
- · Replies 3 ·
Special relativity: Lightning and Trains (no math involved)
- Gravitino22
- · Replies 4 ·
Position vs. Time graph equation
- lcary
- · Replies 1 ·
Ive got a gravitational Potential Energy Question
- clearlyjunk
- · Replies 1 ·
Force Per Length and Magnitude of a Current
- hexus0
- · Replies 1 ·
Basic Nuclear Decay: Calculating Min Mass for 10Ci in 30 Months
- Lachlan1
- · Replies 2 ·
How to Calculate Reactions at Point A Using the Laws of Sine and Cosine?
- drkidd22
- · Replies 10 ·
Black Body Net Heat Absorption Problem
- MattMark'90
- · Replies 3 ·
What is the change in entropy when mixing water and alcohol?
- huybinhs
- · Replies 2 ·
Calculating Torque and Power in Flywheel Energy Storage Systems
- ZzZerozZ
- · Replies 1 ·
Rate of medication elimination
- csands
- · Replies 1 ·
Angular Momentum - Train Placed on a Wheel
- Crusher8576
- · Replies 2 ·
3 ways of finding muzzle velocity?
- bails24
- · Replies 1 ·
Electric Potential and Charges Problem
- buyerat
- · Replies 3 ·
Pendulum question - Vector addition of forces
- daysrunaway
- · Replies 4 ·
Understanding Displacement Current in Charging a Capacitor
- frozenguy
- · Replies 1 ·
Measuring g with Physical Pendulum Time Period (T)
- bon
- · Replies 6 ·
Solving Conduction Heat Wave in Metal Bar
- roam
- · Replies 6 ·
How do I calculate the gravitational red shift for a white dwarf star?
- roam
- · Replies 1 ·
What is the Work Done by a Heat Engine Operating on a Given Cycle?
- huybinhs
- · Replies 10 ·
How Is Work Related to Heat in Thermodynamic Processes?
- jagged06
- · Replies 2 ·
Satellite following circular orbit.
- dator
- · Replies 4 ·
Adiabatic expansion in a thermodynamic system
- cirimus
- · Replies 5 ·
What is the threshold speed needed for this process to occur?
- bon
- · Replies 22 ·
Calculating Power for a 1300 Kg Sports Car Accelerating to 95 km/h in 7.3 sec
- brando
- · Replies 2 ·
Elastic and inelastic collision formula
- trust_noone
- · Replies 1 ·
Calculating Slit Width Using Microwave Wavelength
- Funf
- · Replies 1 ·
Calculate Heat Removed from 130 g Steam to Ice
- jagged06
- · Replies 1 ·
Why do identical vessels with different gases at same P and T have different properties?
- jagged06
- · Replies 6 ·
Relating molar volume to fugacity in solution thermodynamics
- danago
- · Replies 1 ·
Diffraction grating (missing diffraction beam)
- pfellas
- · Replies 4 ·
Potential Energy Change of Mass at Earth's Radius
- sphyics
- · Replies 3 ·
Finding wave speed from y = 0.2cos(10x - 4t)
- ninjarawr
- · Replies 3 ·
Conserved kinetic energy in collisions in different frames
- bon
- · Replies 5 ·
AP FRQ, cue stick strikes a billiard ball, torque, COM, etc
- therest
- · Replies 3 ·
Shanghai Tian Yang Steel Tube Co.,Ltd
- tianyang88
- · Replies 1 ·
How do i measure thermal conductivity?
- TimeTraveler
- · Replies 2 ·
Finding Thevenin equivalent with dependent voltage sources
- endrezr
- · Replies 8 ·
Work done by motor pulling up elevator
- JUSTaROCK
- · Replies 5 ·
Solving a Horizontally Oscillating Ball Problem
- Cfem
- · Replies 3 ·
Annoying electrostatic question
- superaznnerd
- · Replies 7 ·
Pulling a box up a ramp - Newton's second law
- mybrohshi5
- · Replies 6 ·
Finding tinfoil length from mass, thickness and width
- JUSTaROCK
- · Replies 3 ·
Surface area of basket ball full of sand
- JUSTaROCK
- · Replies 5 ·
Proof of the equation of gravational potential energy
- jwu
- · Replies 2 ·
Propagation of uncertainty problem
- libelec
- · Replies 4 ·
Energy Changes of Cyclist: X to Y
- Cheesus128
- · Replies 3 ·
Is the beam in equilibrium with three forces acting on it?
- Cheesus128
- · Replies 2 ·
Diffrence between negative accelaration and positive decelaration?
- Cheesus128
- · Replies 6 ·
How Do You Calculate Average Speed If You're Given Distance and Time in Minutes?
- Cheesus128
- · Replies 3 ·
Finding initial temperature of copper shot in water and aluminum cup
- tcharger130
- · Replies 1 ·
Camera tossed to rising hot air balloon passenger
- P944
- · Replies 1 ·
Finding power line height from ball throw times
- P944
- · Replies 4 ·
Book dropped in descending elevator at 3.3 m/s
- P944
- · Replies 2 ·
Solve Moving Train Problem: Acceleration of -1.85 m/s^2
- Logistix
- · Replies 2 ·
Carnot Air Conditioner Question.
- MrGoodyear812
- · Replies 2 ·
Work done by and on gas in isothermal expansion
- ƒ(x)
- · Replies 2 ·
Calculating Heat Transfer from a Person in a Room
- febbie22
- · Replies 6 ·
Deducing the Elementary Charge from Milikan's Oil Drop Experiments
- imatreyu
- · Replies 13 ·
How Does Voltage Variation Affect Power in a 100-W Heater?
- LeakyFrog
- · Replies 3 ·
Pendulum hanging from a roller coaster
- CloCon
- · Replies 5 ·
Net force on charge between two point charges on x axis
- adam32386
- · Replies 12 ·
How Does the Lorentz Transformation Affect Observed Velocity?
- Camilla
- · Replies 1 ·
Spring hanging from ceiling gives twice the answer with energy method
- IDumb
- · Replies 2 ·
Two-photon production from 0.8c electron-positron annihilation
- Krappy
- · Replies 4 ·
Energy of a Binary System (Gravitation)
- somebody8888
- · Replies 1 ·
Force between blocks in a line with 14 N push
- farrah003
- · Replies 12 ·
Mass of Atom in a Mass Spectrometer
- JonHO
- · Replies 4 ·
What Forces and Powers Are Involved in Moving a Wire Through a Magnetic Field?
- cse63146
- · Replies 4 ·
Image position from object at infinity in glass rod with hemispherical end
- fl415
- · Replies 8 ·
How Do You Calculate Resistance and Current in a Carbon Block Using Ohm's Law?
- LeakyFrog
- · Replies 3 ·
Determining Acceleration of Collar P on Rod AB
- marshall104
- · Replies 14 ·
Frequency of a pressure vs time chart
- emc2566
- · Replies 2 ·
What is the Equivalent Resistance in this Circuit?
- keemosabi
- · Replies 3 ·
How Can I Make a Simple Electric Motor with These Materials?
- Sirsh
- · Replies 1 ·
How Is the Total Momentum Calculated in a Two-Car Collision?
- mybrohshi5
- · Replies 2 ·
How Does Gauss' Law Explain Charge Induction on a Shell from External Charges?
- keemosabi
- · Replies 5 ·
How Does a Heat Engine Lift a Mass Efficiently?
- CloCon
- · Replies 1 ·
Electromagnetism and earth question
- lolzwhut?
- · Replies 1 ·
Box up a ramp - Work and friction force (easy)
- mybrohshi5
- · Replies 11 ·
What is the maximum height h of his jump above the end of the ramp
- nmegabyte
- · Replies 1 ·
Throwing a Short Put - simple Distance problem?
- helpphysics
- · Replies 2 ·
Special Relativity and spacecraft
- sean-820
- · Replies 4 ·
Is the Thrust Problem on an Airbus A320 Jetliner Unsolvable?
- acspin
- · Replies 11 ·
Harmonics Question; prove that v max of a mass on a spring is given by 2 pi f A
- lost_in_phys
- · Replies 11 ·
Particle rolling on a circular path
- diegocas
- · Replies 7 ·
Finding Displacement Amplitude of a Pressure Wave
- roam
- · Replies 4 ·
Unleashing 1.8MJ in Just 1ns: The NIF's Power Per Pulse
- VelvetRebel
- · Replies 1 ·
Angular Momentum of a Bird Flying Near a Building
- mybrohshi5
- · Replies 2 ·
Calculate the magnitude and direction of the resultant force on the object.
- Cheesus128
- · Replies 6 ·
Coulombs Law solving for electrostatics force
- alan1592
- · Replies 5 ·
Acceleration-Constant speed-Deceleration over fixed distance and time
- puppetworks
- · Replies 5 ·
Voltage drop and current for each resistor
- alan1592
- · Replies 8 ·
Finding pendulum length from period and correct angular frequency equation
- musicfairy
- · Replies 8 ·
Work with Friction: Calculating Force & Angle
- dator
- · Replies 3 ·