Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
How Do You Calculate Relative Velocity and Minimum Distance Between Two Boats?
- BryceA
- · Replies 6 ·
Average Velocity and resultant velocity
- cherylrondo
- · Replies 2 ·
Energy flow chart from sun to human, computer, lights, and ball
- energychartflo
- · Replies 3 ·
Body travels half its distance in last 1.70 s of fall
- B18
- · Replies 22 ·
What are the possible values for the coordinate angles in 3-D space?
- Tiven white
- · Replies 1 ·
Thin Film Interference and wavelength
- Aoiumi
- · Replies 1 ·
How Does Doting a Unit Vector With a Vector A Affect the Result?
- Tiven white
- · Replies 4 ·
Nodal analysis voltage confusion
- princejan7
- · Replies 1 ·
Speed of a wave on a string and Frequency of 3rd Harmonic
- ddsMom
- · Replies 10 ·
What is the Direction of x Using the Right Hand Rule?
- Tiven white
- · Replies 3 ·
Is Scalar Addition Equivalent to Adding Parallel Vectors?
- Tiven white
- · Replies 3 ·
Finding centripetal acceleration for a 4 N pendulum bob
- tdreceiver17
- · Replies 5 ·
What Is the Distance Between the Slits in Young's Double-Slit Experiment?
- Aoiumi
- · Replies 2 ·
Coordinate angles of three dimensional vectors
- Tiven white
- · Replies 9 ·
How Do You Calculate Shear Stress in a Flowing Fluid?
- math_04
- · Replies 3 ·
How to find the the acceleration of the block M?
- avistein
- · Replies 7 ·
What is the Angle of a Conical Pendulum Rotating at 4 m/s with a 1.5m String?
- GoodOldLimbo
- · Replies 5 ·
Electron energy levels in Bohr model
- ZedCar
- · Replies 7 ·
Small cylinder inside a larger one, rolling without slipping
- peripatein
- · Replies 2 ·
Collision of particle with plate
- utkarshakash
- · Replies 3 ·
How to prove v(t) = (y(t+Δt) - y(t-Δt))/2Δt
- sabastronomia
- · Replies 4 ·
Calculation of the speed of light
- haha1234
- · Replies 8 ·
Motion on 2D surface - particle hanging from string
- Zatman
- · Replies 9 ·
Are 3D coordinate angles restricted to certain values?
- Tiven white
- · Replies 4 ·
Electrical Resistance (Easy Question)
- Coop
- · Replies 10 ·
Calculating Percentage Uncertainty for Measured Lengths
- calculator20
- · Replies 7 ·
Electric field from finite line charge at distance s
- andylie
- · Replies 2 ·
Bohr's Correspondence Principle and quantum theory
- Yosty22
- · Replies 2 ·
Representing Vectors in 3D Space
- Tiven white
- · Replies 3 ·
Conservation of linear momentum.
- whynot314
- · Replies 7 ·
Why is the cosine of a vector ratio not adjacent over hypotenuse?
- Tiven white
- · Replies 12 ·
Physics Honors-Inclines-Car Rolling Down a Hill With Friction
- Medgirl314
- · Replies 14 ·
Potential for a Central Force Field
- Rococo
- · Replies 13 ·
Grade 12 Motion Problem Question
- socialfox1
- · Replies 8 ·
Physics Honors-Inclines-Car Rolling Down a Hill.
- Medgirl314
- · Replies 7 ·
Newton's Law and Friction (Ramp problem)
- Mad Season
- · Replies 3 ·
Elastic collision/ momentum question w/ conservation of energy
- mjmontgo
- · Replies 5 ·
1-D (I think) Speed to distance problem
- magnanimousto
- · Replies 3 ·
Damped Oscillator Conceptual Problem and Differential Equation Solution
- ggilvar99
- · Replies 2 ·
Saving $$ on Power Usage: Rewire Household Appliance
- fogvajarash
- · Replies 2 ·
How does a transistor relay circuit respond as input voltage sweeps from -5V to +5V?
- Jimmy87
- · Replies 13 ·
Power radiated through a hole in small wavelength distribution
- PsychonautQQ
- · Replies 5 ·
Wiens law to calculate max frequency?
- PsychonautQQ
- · Replies 14 ·
Solved it Nope. - Piano slipping down a ramp
- Medgirl314
- · Replies 12 ·
How Does Time Dilation Affect Pion Decay in Particle Physics?
- MostlyHarmless
- · Replies 3 ·
Horizontal bar is used to support a 75-kg object between two walls
- PHYSStudent098
- · Replies 1 ·
A block slides down an inclined plane of slope angle (theta)
- PHYSStudent098
- · Replies 2 ·
A lot of questions about wave optics
- haha1234
- · Replies 3 ·
How do you do analysis of units?
- Ace.
- · Replies 1 ·
Average Speed vs. Instantaneous Speed
- Natko
- · Replies 1 ·
Why Are the 5 and 20 Ohm Resistors in Parallel?
- princejan7
- · Replies 1 ·
Relationship between frequency and length of pendulum
- Ace.
- · Replies 1 ·
Maximum incline angle for parked car with 0.8 friction coefficient
- Medgirl314
- · Replies 8 ·
Electric Field Problem (why don't I multiply by sin and cos?)
- blackbrawler
- · Replies 10 ·
Heat Efficiency of a Carnot Engine
- castrodisastro
- · Replies 2 ·
How do I solve the dot and cross product of 3i and jxk?
- jdawg
- · Replies 2 ·
Magnetic Forces: Deriving Equation to Balance Rider Weight
- BOAS
- · Replies 1 ·
What Is the Wind Velocity Given Airplane and Ground Speeds?
- Saeedawaw
- · Replies 14 ·
Three-mass System with Friction
- s.dyseman
- · Replies 4 ·
Intensity, frequency and amplitude
- PFuser1232
- · Replies 8 ·
DC motor. Calculate the current
- gucci
- · Replies 1 ·
What is the lapse rate in a simplified model of cloud formation?
- Saitama
- · Replies 14 ·
Why Do Simple Harmonic Motion Equations Differ?
- KiNGGeexD
- · Replies 7 ·
Understanding AFM Imaging: Protrusions and Troughs
- garyd
- · Replies 1 ·
Calculating Ball Speed for Vertical Ascent
- B18
- · Replies 9 ·
Communicating Vessels- how? (searched forum, didn't find it before)
- Bonaparte
- · Replies 3 ·
Stick being pulled by a string from the top
- thonwer
- · Replies 9 ·
Thermodynamics - PV Diagram of an Ideal Gas
- Maybe_Memorie
- · Replies 3 ·
Lorentz Transformation of y-velocity
- muffinbottoms
- · Replies 3 ·
How Does Angular Velocity Affect the Derivative of a Unit Vector?
- mech-eng
- · Replies 25 ·
Can You Catch a Falling Dollar Bill with Your Reaction Time?
- kenji1992
- · Replies 13 ·
Finding Distance with Constant Acceleration
- B18
- · Replies 3 ·
Couple moment problems - Calculate the distance?
- nchin
- · Replies 1 ·
Electric field in insulating slab
- temaire
- · Replies 1 ·
Calculating vector components (displacement, oooh)
- ellal
- · Replies 2 ·
2D Kinematics - 2 rocks off a bridge
- kenji1992
- · Replies 1 ·
Projectile motion of a ball thrown
- icesalmon
- · Replies 5 ·
Integrating Velocity When in Unit Vector Notation
- ThomasMagnus
- · Replies 3 ·
Finding current through resistors in series and parallel
- chococat
- · Replies 5 ·
Potential different between two points in electric field
- songoku
- · Replies 10 ·
Using thermal conductivity to melt ice
- castrodisastro
- · Replies 4 ·
How do you calculate the location of the third virtual image?
- aleksbooker
- · Replies 4 ·
Deriving Formula for m2 in Terms of m1, a, and g in a Two Mass System
- Medgirl314
- · Replies 68 ·
Potential Energy of Point Charges
- Sneakatone
- · Replies 18 ·
Confusion over angle between vectors
- ThomasMagnus
- · Replies 5 ·
If z is east and y is north, what direction is x?
- Tiven white
- · Replies 2 ·
Photoelectric effect and a metal plate
- Bindle
- · Replies 1 ·
Vertical Motion: Understanding Velocity at a Given Time
- jdawg
- · Replies 5 ·
Why do my SHM calculations give different answers than the textbook example?
- KiNGGeexD
- · Replies 7 ·
Finding Angular Speed Using Energy Methods
- student34
- · Replies 9 ·
Calculate Solar Energy Incident on Earth at 1.5x10^11 m from Sun
- student123
- · Replies 3 ·
Two Circular Motion Questions. Pendulums
- navm1
- · Replies 19 ·
Charge accumulation using radiation
- mooreppj
- · Replies 5 ·
Conservation of Momentum of a snow ball
- gcombina
- · Replies 4 ·
Depth of a Water Well by dropping a rock
- MienTommy
- · Replies 3 ·
Angular Acceleration Problem - Compact Disc
- gcombina
- · Replies 2 ·
Vectors - velocity is changing but speed is not
- kenji1992
- · Replies 3 ·
Shortening the length of pendulum
- Saitama
- · Replies 46 ·
Kinematics - centrifuging a solution with bacteria
- kenji1992
- · Replies 13 ·
Which Equation Requires Radians to Be Valid?
- gcombina
- · Replies 2 ·