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 Doppler Shift Method for Calculating Recession Speed
- jsmith613
- · Replies 1 ·
Uncertainty in spring constant from mass and extension measurements
- charmedbeauty
- · Replies 5 ·
Fundamental Particles - Meson Decay Question
- Magda|A380
- · Replies 2 ·
Biomechanics Quadratic Equation problem
- dsm63
- · Replies 3 ·
What is the Velocity of Ozone Formed from Inelastic Collisions?
- l00kitsjake
- · Replies 1 ·
Calculating the Number of loops in the solenoid
- spideykid7
- · Replies 1 ·
Calculating Minimum Speed at Top of Vertical Loop
- SamLing2000
- · Replies 2 ·
Kinematics of Rotational Motion (Gears)
- freshbox
- · Replies 4 ·
Finding wavelength from photon energy
- nukeman
- · Replies 5 ·
How Much Force Does a Man Feel in a Train-Truck Collision?
- centrix
- · Replies 3 ·
Work done on a gas as volume decreases
- kabailey
- · Replies 1 ·
Physical Science Question on Electrical Power and Energy
- CEF721
- · Replies 1 ·
Confirm My Suspicions: Calculating Velocity on an Incline Plane
- XADS230
- · Replies 4 ·
Higher potential in electric field
- Pentafem
- · Replies 6 ·
Magnetic force between four wires at corners of a square
- runphysicsrun
- · Replies 1 ·
Kinematics of Rotational Motion Part II
- freshbox
- · Replies 14 ·
Mathematical model, work done on a gas
- kid_123
- · Replies 5 ·
Determine the percent efficiency
- snowberryhaze
- · Replies 9 ·
Maximum height reached by a projectile
- sid9221
- · Replies 2 ·
Structural Support: How to Handle Heavy Loads
- tigers2004
- · Replies 1 ·
Calculating Electrical Energy Input for 70% Efficient Lift Motor
- Taylor_1989
- · Replies 5 ·
Really Hard(for me) head on collision question
- ZxcvbnM2000
- · Replies 3 ·
A problem with equivalent resistance
- fizica
- · Replies 1 ·
Difference between bright fringe, maxima, and constructive interference
- Modjib
- · Replies 3 ·
Electricity - Resistance problem
- gvhunting
- · Replies 2 ·
Finding Charge at a Specific Point Using Coulomb's Law
- Roodles01
- · Replies 2 ·
Why do air resistance and restoring force act in the same direction?
- FeDeX_LaTeX
- · Replies 11 ·
Motion of Charges in E and B Fields
- PatrickGeddes
- · Replies 4 ·
Electric field from two point charges as a function of x
- pierretong
- · Replies 3 ·
Steel ring and brass shaft thermal expansion problem
- Juniorphysics
- · Replies 3 ·
Two balls of different mass elastically collide
- REGNUM
- · Replies 1 ·
Velocity problems regarding vectors
- amit25
- · Replies 1 ·
How is 100 W produced over 24 hours in Edexcel Unit 4 Specimen Paper?
- jsmith613
- · Replies 2 ·
Super basic problem, not sure if I'm doing it right or not
- kax0r
- · Replies 1 ·
Finding an unknown applied force with friction, Fnet and more.
- QuickSkope
- · Replies 2 ·
Changes of state , latent heat and heat transfers
- supernova1203
- · Replies 11 ·
Friction coefficient and work-energy problems with multiple forces
- satycorn
- · Replies 3 ·
Modified Atwood Machine Problem
- plazprestige
- · Replies 1 ·
Calculating Work Done on a System with Changing Pressure and Volume
- sweetpete28
- · Replies 10 ·
Conservation of momentum: Student walking on surfboard find resultant velocity
- n3w ton
- · Replies 2 ·
Velocity, speed, and position of spaceship with acceleration (1,2,3) m/s²
- amit25
- · Replies 3 ·
Maximum Magnification of Microscope
- JSGandora
- · Replies 2 ·
Understanding Absolute Pressure Changes in a Simple Buoyancy Problem
- mps
- · Replies 8 ·
Tension in cord connecting two boxes with pulley and friction
- jami8337
- · Replies 1 ·
Current in a parallel resistor?
- TheGreenMarin
- · Replies 12 ·
Help finding a research question
- Melancholy
- · Replies 3 ·
Thermodynamics: dropping iron into thermos of nitrogen at boiling point
- MrMaterial
- · Replies 1 ·
Why is the s = vt - (1/2)at2 formula not included in exams?
- influx
- · Replies 8 ·
Thermal properties of materials
- Spakfilla
- · Replies 1 ·
Calculating Change in Potential Energy of Moon 4.0 cm Closer to Earth
- m.rahim
- · Replies 4 ·
Damped and Forced Harmonic Motion
- FeDeX_LaTeX
- · Replies 4 ·
Small Oscillations about the equilibrium point:
- djames1009
- · Replies 1 ·
Thermodynamics problem - need to find amount of water that boils
- sweetpete28
- · Replies 30 ·
Astronomy question - Sidereal time calculation
- daleklama
- · Replies 3 ·
Energy Formulas with the form (1/2)ab^2
- krismath
- · Replies 9 ·
Refraction Problem istance Coin Appears to be in Glass Sphere
- JSGandora
- · Replies 7 ·
Why is kinetic energy a cos² function for U(x)=4x² with E=7J?
- dmayers94
- · Replies 1 ·
Calculating beta for two moving light sources
- billy92
- · Replies 6 ·
Mean velocity in a circular pipe
- kbaumen
- · Replies 2 ·
The Physics of Fishing and Rotational Motion
- tfl813
- · Replies 11 ·
Temperature increase due to increase of resistance
- pokie_panda
- · Replies 2 ·
Why does Q=mcΔT differ for gases at constant pressure vs constant volume?
- hqjb
- · Replies 9 ·
Falling mass onto flat plate pressure exerted
- llamedos
- · Replies 3 ·
Friction problem-how does speed affect the frictional force
- Elbereth
- · Replies 5 ·
Why are U and H minimized at constant S and V or P?
- 5LAY3R95
- · Replies 1 ·
Find the energy in a circuit, delivered to resistors, by battery, etc
- Color_of_Cyan
- · Replies 12 ·
Calculating Internal Resistor in a Series Battery Circuit
- helper-
- · Replies 6 ·
Moment of inertia formula for a propeller
- localrob
- · Replies 4 ·
What is the engine's thermal efficiency?
- Bigworldjust
- · Replies 2 ·
How Does the Doppler Effect Alter Radar Frequencies?
- Lengalicious
- · Replies 1 ·
Thin film diffraction - to start
- big_boi
- · Replies 1 ·
Calculate the energy stored in Capacitor and Inductor
- ckboii89
- · Replies 1 ·
Impulse and force for baseball struck by bat
- chubbyorphan
- · Replies 20 ·
Uniform Magnetic Field question
- Garmeth
- · Replies 1 ·
Period of Oscillation of a Board Between 2 Identical Rollers
- comprado
- · Replies 12 ·
Ball Spinning Horizontally on String
- ShamelessGit
- · Replies 7 ·
Light in Underwater Pool Refraction Problem
- JSGandora
- · Replies 3 ·
When is the Particle at Equilibrium Position?
- Lengalicious
- · Replies 2 ·
Relating Point Charges for a Net Zero Force
- cuddlylover
- · Replies 4 ·
How can the required force be calculated for pushing a block up an incline?
- henlet
- · Replies 2 ·
Control system with equation C = A*x + B*dx/dt
- zsero
- · Replies 6 ·
Optics problems - real vs, virtual / thin film
- big_boi
- · Replies 1 ·
What is the volume of compressed dry steam from 1 bar to 4 bar isothermally?
- naim
- · Replies 5 ·
Solving the Slender Ladder Problem: Angular Acceleration
- eurekameh
- · Replies 5 ·
How can I find the focal length of a lens silvered at one face?
- jd12345
- · Replies 1 ·
Gravitation problem (estimate numbers of stars in our galaxy)
- U.Renko
- · Replies 1 ·
Mechanics midterm-terminal velocity question
- Kara-Mustafa
- · Replies 1 ·
Maximum Height of Two Balls After Collision in Air
- rh0mbus
- · Replies 2 ·
Electric potential of concentric spheres
- 5te4lthX
- · Replies 3 ·
Tension of cables of unequal length
- mikejones222
- · Replies 2 ·
Finding charge between parallel plates with mass given
- wow22
- · Replies 4 ·
What happens to electrical energy when rolling a quartz ball into another quartz ball?
- daveyjones97
- · Replies 1 ·
Does pressure decrease where pipe volume increases?
- bfusco
- · Replies 3 ·
Change in mechanical energy of a bullet
- Cillie
- · Replies 2 ·
Electricity Problems - conductive spheres
- big_boi
- · Replies 1 ·
What is the required speed for the last 2 laps to qualify for the race?
- Jimbo57
- · Replies 1 ·
Electric Potential at Point D in a Rectangle with Three Charges
- Swan
- · Replies 2 ·
Planning an Experiment: Excellent Thermal and Electrical Conductors
- Shordaay
- · Replies 11 ·
Force needed to apply for acceleration 2ms^2
- VanzLee
- · Replies 1 ·