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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Can an NPN Transistor Light Up a Bulb?
- dumguy
- · Replies 1 ·
Calculating Speed of Golf Ball After Contact
- jinman
- · Replies 4 ·
Mass sliding down incline with spring
- fireearthair8
- · Replies 3 ·
Projectile Motion and Speed: Solving for Initial Velocity and Height
- dano404
- · Replies 5 ·
Solve 10km Train Acceleration Problem in 6 Mins
- speedy46
- · Replies 22 ·
How Do Electric and Magnetic Fields Behave Around a Moving Electron?
- gstrosx
- · Replies 1 ·
Phase change for reflections between three layers with n1 < n_f > n3
- Monochr
- · Replies 2 ·
Relativistic kinetic energy and proton collisions
- Vuldoraq
- · Replies 4 ·
Phase difference between two points for spherical sound wave
- fredrick08
- · Replies 9 ·
Finding two currents from magnetic force between parallel conductors
- Bradsteeves
- · Replies 11 ·
Problem involving tension, circular motion, and equilibrium
- crazyog
- · Replies 1 ·
Thermodynamics - efficiency of power plant
- fredrick08
- · Replies 8 ·
Rotational kinetic energy and power
- warmfire540
- · Replies 5 ·
Why can't any vehicle orbit Earth in less than 80 minutes?
- a.a
- · Replies 5 ·
Completely Lost in this Physics Problem Sinusoidal transverse waves
- cahardy86
- · Replies 4 ·
Meteoric Radiation Decay Question Check
- TFM
- · Replies 1 ·
Find Reactions of 4000lb Crate in Truss Figure 1
- kennyvs
- · Replies 2 ·
Simple Velocity Problem: Solving for Time with Two Traveling Cars
- jk4
- · Replies 2 ·
Resistance from I vs. V graph problem
- nokia8650
- · Replies 5 ·
Finding EMF from a circuit with total resistance 900 ohms
- DeanBH
- · Replies 10 ·
Magnetic field at the center of a solenoid?
- tabitha2232
- · Replies 2 ·
Adiabatic Hot-Air Balloon Rising Question
- TFM
- · Replies 15 ·
Why is non-collinear momentum not considered in this analysis?
- matt222
- · Replies 5 ·
Special relativity velocity tansforms
- Vuldoraq
- · Replies 2 ·
How Do You Calculate the Spring Constant for a Trampoline?
- joeth04
- · Replies 22 ·
A Multirange Coil Ammeter Galvonmeter (?) resistance question
- TFM
- · Replies 23 ·
Question that I simply can't figure out and
- msilva731
- · Replies 2 ·
Force applied to a wagon [Answer Check]
- lamerali
- · Replies 23 ·
Can a car be considered in rotational equilibrium?
- shortydeb
- · Replies 3 ·
Magnetic Fields, Deuterium and curved tracks
- TFM
- · Replies 12 ·
Trajectory parametric equations
- krisrai
- · Replies 3 ·
Snooker ball collision with table side and coefficient of restitution
- rock.freak667
- · Replies 6 ·
Calculate Initial Muzzle Velocity for Gun Using Physics Equations
- Crime Girl
- · Replies 19 ·
Charge vs. Electric Field Strength
- Sperry
- · Replies 1 ·
Finding support forces on a suspended beam
- DeanBH
- · Replies 9 ·
Extra-Solar Planets and their stars wobble
- TFM
- · Replies 12 ·
Impulse and change in momentum of a golf ball struck by a club
- vandorin
- · Replies 3 ·
What makes a fictitious force fictitious?
- BitXBit
- · Replies 4 ·
Interference Jones and the number of bright bands
- tlarkin
- · Replies 3 ·
Electric Currents, Magnetic Fields
- Haro2319
- · Replies 2 ·
How does a photodiode work in reverse and forward bias?
- sanado
- · Replies 3 ·
Mechanics Question of a particle
- _Mayday_
- · Replies 18 ·
Calculate the average binding energy per nucleon
- salsabel
- · Replies 2 ·
Calculating the Age of a Body Using Carbon-14 Dating
- salsabel
- · Replies 1 ·
Load bearing structure made of matchsticks
- grey
- · Replies 3 ·
Reception of distant FM radio broadcasts
- Kylah
- · Replies 4 ·
Gravity Ratios using pronumerals
- yakiland
- · Replies 2 ·
Proving the Truth of a Simple Formula
- lesodk
- · Replies 3 ·
Electric Car Battery Internal Resistance Effects
- nokia8650
- · Replies 14 ·
Does resultant force follow y=1/x if velocity vs time shows decreasing gradient?
- nokia8650
- · Replies 6 ·
Physics Olympics: Design System for Cable Car "Bomb" Drop
- xporcelainx
- · Replies 1 ·
So, if Jimmy adds a resistor in parallel to a circuit with two other resistors
- pebbles
- · Replies 1 ·
Wavelenght of the incident light
- wyclefchick
- · Replies 5 ·
First Law of Thermodynamics and ideal gas
- brutalmadness
- · Replies 3 ·
What Is the Minimum Angle of Incidence for Light to Traverse a 60-Degree Prism?
- John_Galt
- · Replies 1 ·
Why do both nuclear fusion and fission release energy?
- salsabel
- · Replies 2 ·
Force and Motion Homework: Solving for Mass Comparison on Slopes
- Cantworkit
- · Replies 1 ·
Why current leads to a greater resistance
- nokia8650
- · Replies 1 ·
What Are the Dimensions of A, B, and D in the Rocket Velocity Equation?
- BioCore
- · Replies 1 ·
Solve Diffraction Question: 2 Speakers 4.0m Apart, 325Hz, 343m/s, 4.5m Away
- equanox
- · Replies 4 ·
Resnick's Introduction to Special Relativity
- Angelos
- · Replies 1 ·
Submerged depth of wood raft in fresh water
- silently_loud
- · Replies 1 ·
How Much Energy Does a Light Bulb Waste in a Month?
- bruinboy28
- · Replies 22 ·
Simple Harmonic Motion Maxiumum Velocity
- richardstan
- · Replies 1 ·
Is the internal energy of a gas a combination of kinetic and potential energy?
- nokia8650
- · Replies 3 ·
Building a Successful Faraday Cage for Cell Phone Signal Cancellation
- Krankles
- · Replies 6 ·
Particle Physics, perhaps a classification problem
- Hevonen
- · Replies 13 ·
How Does Thermal Expansion Cause Concrete Sidewalks to Buckle?
- kamakari
- · Replies 3 ·
Finding the second displacement vector from two known displacements
- Dreams2Knight
- · Replies 5 ·
Why Should a Boat Row at 90 Degrees to Cross a River Fastest?
- crazyog
- · Replies 4 ·
Wording Question Regarding Angles
- Linday12
- · Replies 3 ·
Pulley Motion Analysis: Determining Tension in a String
- _Mayday_
- · Replies 4 ·
How Does Accelerating a Car Affect Its Engine's Angular Metrics?
- warmfire540
- · Replies 1 ·
How Does a Liquid Oscillate in a U-Shaped Tube?
- qazxsw11111
- · Replies 1 ·
What are the angles for static equilibrium in a board supported by a rope?
- Oomair
- · Replies 3 ·
How to Calculate Uncertainty in Scientific Measurements?
- qazxsw11111
- · Replies 5 ·
Time to Pass 30m - Joe's Car 4.33s
- brendanmeneze
- · Replies 4 ·
Is energy released in Ra-226 decay without mass conversion?
- daNAV1GATOR
- · Replies 3 ·
Find Distance Given Mass and Velocity for Failed Locomotive
- krisrai
- · Replies 8 ·
Finding Maximum Energy of Ejected Electrons in Photoelectric Effect
- sodr2
- · Replies 6 ·
Do Muons and Electrons with the Same Kinetic Energy Share Identical Wavelengths?
- JaWiB
- · Replies 3 ·
Two wheels and angular acceleration
- rosstheboss23
- · Replies 5 ·
How Do You Calculate Maximum Speed in Spring Oscillations?
- K3nt70
- · Replies 9 ·
Monatomic Ideal Gas volume expansion
- TFM
- · Replies 9 ·
Quick forces conceptual question
- bcjochim07
- · Replies 2 ·
Finding resistivity experimentally
- nokia8650
- · Replies 2 ·
Total voltage, current and resistance
- Lavace
- · Replies 2 ·
Fabry-Perot interferometer diffraction
- Math Jeans
- · Replies 4 ·
Speed of signals in digital phone line?
- kejjie
- · Replies 13 ·
Equilibrium problem and a beam of mass
- Oomair
- · Replies 7 ·
Are the fat side of a diode and long side of a battery on the same side for forward bias?
- nokia8650
- · Replies 1 ·
Work Done and final temperature of 5 mols of Ideal Gas
- TFM
- · Replies 11 ·
Spring Oscillation: Solve for Speed at t = 0.820s
- K3nt70
- · Replies 5 ·
Force and friction on stacked prisms with 45° angle
- Vermillion
- · Replies 6 ·
Horizontal force on parcel on 30° incline
- _Mayday_
- · Replies 5 ·
Two spheres colliding in a circular groove with coefficient of restitution
- wanchosen
- · Replies 2 ·
Solving 2D Pulley Forces Problem with Force F and Angle theta
- helgi2008
- · Replies 7 ·