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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The mass flow rate in a heat exchnager
- JB1234
- · Replies 5 ·
How to Simplify and Find Power in a Circuit?
- Paymemoney
- · Replies 4 ·
What is the Distance Between Two Photons in Different Reference Frames?
- noblegas
- · Replies 3 ·
Why is the center of mass formula defined that way?
- madah12
- · Replies 5 ·
Calculating Gas Particle Effusion Rate Through Two Holes
- Grand
- · Replies 1 ·
Static and Kinetic Friction: Find Force & Acceleration
- phever
- · Replies 1 ·
Gauge Pressure of Tires - find car mass
- BeiW
- · Replies 4 ·
Conservation of Bayron number, Lepton number and strangeness
- Yael
- · Replies 2 ·
Thermodynamics - closed system
- shahar weiss
- · Replies 12 ·
Physics Olympiad 2010 practice test question # 23
- NewtonGalileo
- · Replies 8 ·
How Do You Calculate Average Acceleration in a Piston Cycle?
- Palladian1881
- · Replies 2 ·
Kinetic energy during energy levels
- aurao2003
- · Replies 2 ·
Number of Wavelengths Emitted from Excited Atomic Hydrogen Level 4
- aurao2003
- · Replies 5 ·
Colour change due to refraction
- zorro
- · Replies 13 ·
Does Room Temperature Affect Air Energy While Maintaining Constant Pressure?
- Grand
- · Replies 7 ·
Solving Beams with Triangular Loads - Why the Third Point?”
- remi_c
- · Replies 1 ·
Equivalent resistance of a circuit with parallel and series resistors
- rahulc
- · Replies 1 ·
Non-uniform thermal conductivity
- matt222
- · Replies 6 ·
Is Linearity Always Exact in Differential Equations?
- bon
- · Replies 3 ·
2 parallel rays are travelling in a medium
- zorro
- · Replies 9 ·
What is the friction force required for a wheel to roll without slipping?
- kareem_3d
- · Replies 1 ·
Some simple distance vs time problems?
- -Dragoon-
- · Replies 2 ·
Superluminal motion. How's that possible?
- xander1984
- · Replies 52 ·
Biker projectile motion off a 30° ramp after 50 m acceleration
- scratch1
- · Replies 13 ·
What Is the Electric Field at the Surface of a Geiger Counter?
- manenbu
- · Replies 5 ·
Some questions about quantum mechanics
- R.P.F.
- · Replies 1 ·
Electric charge and electric feild prblem
- geniusawy
- · Replies 2 ·
Calculate the time of the impact of this force
- UNknown 2010
- · Replies 5 ·
Understanding Galvanic Cells: Salt Bridge, Electrode Potential, and More
- Misr
- · Replies 4 ·
Turning effect of forces - moments
- INeedHelpPls
- · Replies 7 ·
Relating photon momentum to force to levitate a mass with light
- ride4life
- · Replies 3 ·
Distance, Acceleration, Time, and Power
- Norngpinky
- · Replies 5 ·
Average emf induced in Square Loop
- connie5828
- · Replies 2 ·
Which mechanics and EM topics matter most for modern physics
- diligence
- · Replies 5 ·
Why does compressing a gas make it heat up?
- Peter G.
- · Replies 7 ·
Does a spring count as a surface?
- flyingpig
- · Replies 1 ·
Why is tension conservative in a pulley block system?
- vissh
- · Replies 12 ·
Why a heavier skier/whatever is faster, the answer.
- re1s
- · Replies 3 ·
Net Force of 60 kg Person in Elevator: Up/Down
- barthayn
- · Replies 4 ·
Egg drop challenge with limited packing materials
- Ghettobabe
- · Replies 10 ·
Vector triple products A×(B×A) and A×(B×C)
- clementc
- · Replies 8 ·
Solving for acceleration of a piston
- Palladian1881
- · Replies 1 ·
Metal ball swinging in a circle with velocity 3.0 m/s
- Nusc
- · Replies 11 ·
Velocity and acceleration from curling stone distance and time measurements
- The_big_dill
- · Replies 14 ·
What is the force at the axis of a rotating rod
- Karol
- · Replies 2 ·
How Does Energy Transform into Force During Physical Interactions?
- Peter G.
- · Replies 1 ·
Classical Mechanics (Lagrangian)
- firemarsh
- · Replies 8 ·
How Do You Calculate Optical Properties of an Unknown Thin Film?
- Tzontonel
- · Replies 8 ·
Understanding Charge and Electric Current in a Circuit
- Peter G.
- · Replies 5 ·
Why does doubling cart mass give different centripetal acceleration answers?
- MusicTheorist
- · Replies 14 ·
Annihilation of two particles / Rest mass energy
- physics369
- · Replies 2 ·
Finding average resistive force
- jman1209
- · Replies 1 ·
Finding maximum velocity from kinetic and potential energy conservation
- epix
- · Replies 2 ·
What is the Effect of Reduced Air Resistance on an Object's Acceleration?
- Dberry
- · Replies 4 ·
How do you calculate/find mass, volume?
- brysonlee
- · Replies 4 ·
Finding mass only given electrons
- CathyLynn45
- · Replies 3 ·
Drawing Free Body Diagrams for Acceleration Problems
- MysticDude
- · Replies 10 ·
Newton's Laws, not sure which law this is, also FBD
- flyingpig
- · Replies 33 ·
Solving Force Problems: Divide Weight of Plane by Gravity?
- Dberry
- · Replies 5 ·
Why Does My Mirror Fog Up When I Take a Shower?
- Peter G.
- · Replies 2 ·
Emergency, derive or derivative of moment of intertia
- Clairepie
- · Replies 3 ·
How Fast is the Distance Between Two Ships Changing at 4:00 P.M.?
- madah12
- · Replies 3 ·
Loop the loop problem with centripetal force
- r19ecua
- · Replies 1 ·
Circular ring and potential at its centre.
- lavanyasharma
- · Replies 1 ·
Why Is My Calculated 'g' Value Incorrect When Using the Pendulum Equation?
- Danni11111
- · Replies 9 ·
Right-hand rule for force on a current-carrying wire in a magnetic field
- homevolend
- · Replies 7 ·
Head-on collision of car and truck with equal speeds
- harsh95
- · Replies 7 ·
How Fast Does Howard Fly from the Cannon?
- leggomymeggo
- · Replies 3 ·
Troubled by Integrating Dose Rate
- matt222
- · Replies 1 ·
Does airplane drag depend on weight?
- apst
- · Replies 3 ·
What Will Be the Radiation Level at 6m from a Point Source?
- nonphysical
- · Replies 12 ·
How about a QUESTION OF THE DAY?
- dharavsolanki
- · Replies 4 ·
Solving Inclined Plane Motion: Find Force for Acceleration
- Ockonal
- · Replies 1 ·
What is the solution to the Hanging Chain Problem?
- xeonese
- · Replies 1 ·
Force components on a rolling sphere at point P on a loop
- sicrayan
- · Replies 1 ·
How can I find a unit vector that bisects the angle between two other vectors?
- Cloud 9
- · Replies 2 ·
What is the rockets momentum after the course change?
- sidge2222
- · Replies 3 ·
How Does Doubling Speed Affect Energy Use Against Drag in Cycling?
- justunme
- · Replies 1 ·
Area moment of inertia of a triangle
- andmcg
- · Replies 5 ·
Comparison of Electric and Magnetic Forces
- godiva
- · Replies 1 ·
Induced Current and Magnetic Fields
- d4v3
- · Replies 4 ·
I don't get why this is the same?
- flyingpig
- · Replies 5 ·
Pounds of force upon impact question
- magicalheat
- · Replies 4 ·
De Broglie postulate and electron acceleration
- sushiking
- · Replies 1 ·
How Do You Calculate Angular and Linear Velocities of a Rotating Rod?
- wooram83
- · Replies 4 ·
Thermodynamics: Turbojet nozzles
- mullzer
- · Replies 1 ·
Calculating the Time and Angle of a Falling Stick on a Table
- onlygirl
- · Replies 2 ·
Static fluids; Density; Buoyancy
- awertag
- · Replies 1 ·
Snowboarder velocity physics problem
- vanessajune77
- · Replies 6 ·
Light after a Polarizer Question
- iurod
- · Replies 1 ·
Electric Field and Electric Potential Question
- iurod
- · Replies 3 ·
Projectile motion practice exam problem
- ghettobacon
- · Replies 3 ·
Spaceship relativity: KE, time dilation, and distance
- iurod
- · Replies 8 ·
What is the Formula for Thin Film Interference?
- Precursor
- · Replies 2 ·
Determine the length the pendulum has travelled
- Nusc
- · Replies 2 ·
What is the entropy change of gas during an internal combustion engine test?
- sparkle123
- · Replies 8 ·
Satellite in orbit around Mars: gravity, acceleration, velocity
- runningirl
- · Replies 4 ·
How Do You Calculate the Initial Height of a Block on a Frictionless Ramp?
- Swimkid711
- · Replies 3 ·
A block on incline and forces acting upon it
- darklordavion
- · Replies 7 ·
Magnitude of the acceleration of the ball
- darklordavion
- · Replies 1 ·