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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Planet orbiting around a star whose mass changes
- FruitNinja
- · Replies 7 ·
Center of Pressure: 2b/3 from Free Surface
- foo9008
- · Replies 5 ·
LR circuit in parallel, need someone to check answer
- Erik P
- · Replies 31 ·
Why is the elastic potential energy when extension is (a+l/20) included?
- Janiceleong26
- · Replies 3 ·
Resonance frequency of a wine glass experiment
- Zoro
- · Replies 10 ·
Parallel RC Circuits: Charging to 0.75V in Seconds
- erisedk
- · Replies 4 ·
Why does the speed remain the same?
- lioric
- · Replies 47 ·
Calculating velocity and acceleration from a position-time graph
- alexandria
- · Replies 10 ·
Help with kinematic equations homework problems 25-27
- alexandria
- · Replies 8 ·
A ball is swung in a circular path
- 234jazzy2
- · Replies 5 ·
Kinematics - Interpreting Graphs and deriving equations
- alexandria
- · Replies 2 ·
Kinematics - identifying and describing types of motion
- alexandria
- · Replies 2 ·
Energy Loss of a ball falling off the lip of a ramp
- Matt Bradford
- · Replies 6 ·
Oscillations of a free hanging chain
- kregg34
- · Replies 11 ·
Circular Motion in a Simple Mass Spectrometer
- Oribe Yasuna
- · Replies 4 ·
What is the required torque for a servo to swing a 5lb golf club at 120 MPH?
- GolfRobots
- · Replies 4 ·
What Is the Voltage Across the Resistor in an LC Circuit with Given Parameters?
- meaghan
- · Replies 3 ·
How can a photon have a frequency?
- DiamondV
- · Replies 1 ·
Comparing filament resistances of 100W, 60W and 40W bulbs
- erisedk
- · Replies 9 ·
Charge distribution in concentric metal spheres using Gauss' law
- LambertoPierto
- · Replies 8 ·
Help with hydrostatic pressure exercises 11-13
- sunes123
- · Replies 1 ·
Calculating Distance Covered by a Particle Using Displacement Vector
- Nader AbdlGhani
- · Replies 4 ·
Projectile embedded in wooden cylinder: angular momentum
- JulienB
- · Replies 25 ·
Does temperature of cooking gas change in a moving truck?
- erisedk
- · Replies 6 ·
Thermal expansion of a liquid in a cylindrical container
- issacnewton
- · Replies 2 ·
Calculating Internal Energy Change: Path 2 of Carnot Cycle Question
- Munir M
- · Replies 1 ·
Find Wavelength of 8cm Closed Pipe: 7th Harmonic
- ThePhysicsXV
- · Replies 5 ·
Electron in a Finite Square Well
- Potatochip911
- · Replies 1 ·
Does Adding Mass to a Spring Change Its Amplitude Range?
- soccer5454
- · Replies 1 ·
Magnetic Field at center of a Square loop
- Elvis 123456789
- · Replies 6 ·
Is the Kinetic Energy of Water at 0°C Greater Than Ice at 0°C?
- TT0
- · Replies 4 ·
Why is water unable to flow from A and B to C in a branching pipe system?
- foo9008
- · Replies 7 ·
Why does Earth's slowing rotation change the moon's orbital distance?
- FruitNinja
- · Replies 10 ·
Is the Right-Hand Rule Applied Correctly in Determining Magnetic Forces?
- LaneRendell
- · Replies 1 ·
Graphing free fall motion and calculating acceleration
- Marleycake
- · Replies 3 ·
Power Dissipated in a Sliding Resistor
- Silverado
- · Replies 10 ·
What is the frequency of a police siren when you run away from it?
- ThePhysicsXV
- · Replies 21 ·
Magnetic Field at the center of a square loop
- Elvis 123456789
- · Replies 7 ·
What frequency did you hear 3 seconds after police pass?
- ThePhysicsXV
- · Replies 7 ·
Velocity change due to load dropped vertically onto trolley
- Maka42
- · Replies 18 ·
For 2) wouldn't there also be an equal and opposite force on block B by block A?
- Gooner5
- · Replies 4 ·
Electron in 1-D box: photon absorbed?
- Ryaners
- · Replies 2 ·
Find Heat Energy Needed to Expand Gas to Triple Volume
- Munir M
- · Replies 2 ·
Significant figures in permissible error calculation
- Abhishek Gupta
- · Replies 5 ·
Why is hydraulic diameter 4Rh in problem 4.4 but 2Rh in problem 4.5?
- foo9008
- · Replies 3 ·
Solve KVL for R and e: 3.2 Ohms, 0 Volts
- promusician
- · Replies 1 ·
Question on Orbits and Kepler/Uni. Grav. Laws
- RoboNerd
- · Replies 12 ·
Determining Direction of Acceleration in Pulley Problems
- Balsam
- · Replies 14 ·
Magnetic field in rectangular coil (not solenoid) Amperes law
- LambertoPierto
- · Replies 3 ·
Conservation of energy - elastic potential energy and k.e.
- Janiceleong26
- · Replies 4 ·
Make a Eddy Current to Hover - A DIY Project
- pompom15
- · Replies 9 ·
Even potential with even/odd energy eigenfunctions
- Potatochip911
- · Replies 5 ·
Do all masses in a pulley have the same acceleration?
- Balsam
- · Replies 2 ·
Using Eddington Luminosity to calculate mass
- Ellie Snyder
- · Replies 9 ·
Rms velocity of electron in free space?
- Brennen berkley
- · Replies 2 ·
Black Body Radiation and ambient temperature
- mukul
- · Replies 7 ·
Electric Potential of a Point Charge close to R=0
- Craig Scott
- · Replies 6 ·
Can someone give me some hints for this incline problem?
- DavidFrank
- · Replies 14 ·
How Does Newton's Third Law Apply When a Truck Pulls a Car?
- sciencecats
- · Replies 4 ·
Dynamics of material (momentum )
- Faraz
- · Replies 21 ·
Show that the equipotential lines are circles
- Erik P
- · Replies 16 ·
Angle of average acceleration while turning a curve
- sadpwner
- · Replies 8 ·
Entropy of a chemical reaction
- erisedk
- · Replies 4 ·
Geostationary satellite orbit radius as a multiple of Earth radius.
- Physgeek64
- · Replies 13 ·
Distance of closest approach of alpha particle calc
- Physgeek64
- · Replies 7 ·
Why is There a - Sign in an Integral?
- foo9008
- · Replies 1 ·
What Speed Makes Kinetic Energy Equal n Times Rest Energy?
- Pual Black
- · Replies 5 ·
How is Bernoulli's equation related to saxon bowls?
- odysseyinheights
- · Replies 2 ·
How do I use the parallel axis theorem for moment of inertia in this homework?
- reminiscent
- · Replies 27 ·
Two Long Straight Wires Carrying Curent
- CARNiVORE
- · Replies 2 ·
Why Doesn't the Flow Rate Change When a Vane is Moving in a Pipe?
- foo9008
- · Replies 11 ·
Electrical energy converted to heat in coil
- Erik P
- · Replies 15 ·
What is the length of the string?
- ThePhysicsXV
- · Replies 22 ·
Formula of energy per unit weight
- foo9008
- · Replies 5 ·
Archived Magnetic field from surface current using Biot-Savart law
- BlackMelon
- · Replies 2 ·
Rotational Motion: Final Translational Speed
- hzx
- · Replies 4 ·
The maximum deformation of the ball?
- blueray101
- · Replies 4 ·
Archived Air entering cylindrical object through orifice during reentry at Mach 25
- chellam2206
- · Replies 2 ·
What Are Gravitational Waves and Why Are They Important for Your Physics Thesis?
- Chahunda
- · Replies 3 ·
Magnetic Field from two parallel wires
- Geogargoyle
- · Replies 1 ·
Do Rubber Band Propelled Planes Fly Further?
- Drunken Deriver
- · Replies 13 ·
Young's Double Slit - Low intensity
- elevenb
- · Replies 1 ·
Phase difference between waves in two-slit model
- vetgirl1990
- · Replies 1 ·
Specific volume of stone in water displacement
- foo9008
- · Replies 8 ·
Induced EMF from moving conducting rod
- OhBoy
- · Replies 1 ·
Non-inertial frame of reference
- rrosa522
- · Replies 1 ·
Calculating Launcher Mass from Projectile Acceleration
- Balsam
- · Replies 24 ·
Finding the angle of phase difference - two slit model
- vetgirl1990
- · Replies 7 ·
Can Physics Save the Hospital from Mortar Fire?
- lynnx95
- · Replies 7 ·
Calculating Masses in a Dynamic Pulley System
- PhoenixWright
- · Replies 9 ·
How Fast is the Missile Relative to the Rocket?
- henrco
- · Replies 2 ·
Rod sliding on rails with constant current through resistor
- erisedk
- · Replies 5 ·
Magnetic field components of a circuit
- Erik P
- · Replies 5 ·
Angular acceleration from angular velocity
- robothito
- · Replies 3 ·
Rocket in space travels between two stars
- henrco
- · Replies 7 ·
Velocity of Three Charges Released from Equilateral Triangle
- Ichigo449
- · Replies 1 ·
Rope falling through a hole on a frictionless table
- Potatochip911
- · Replies 7 ·
Normal force of a mass sliding down a quarter circle
- Jamest39
- · Replies 9 ·
Calculation of permissible error in physical quantity
- Abhishek Gupta
- · Replies 4 ·
How High Can You Jump on asteroid 243 Ida?
- in the rye
- · Replies 5 ·