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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How Many Electrons are Needed to Create a Force of 10^-19 N Between Two Spheres?
- lionel messi.
- · Replies 1 ·
Confusion of circle and sphere for physics problems
- zabachi
- · Replies 4 ·
Conveyor Belt's Power: Calculating Energy and Power in a Moving System
- bakufun
- · Replies 2 ·
Electromagnetism problem using Gauss's Law
- hagisucks
- · Replies 16 ·
Solving a 2D Elastic Collision Problem with Two Unknowns
- Legit
- · Replies 7 ·
Calculating Earth's Capacity as a Conductor
- lionel messi.
- · Replies 2 ·
Queries about an electrostatic precipitator
- sgstudent
- · Replies 4 ·
Calculating the power of a car engine
- fawk3s
- · Replies 3 ·
Solve Moment Determining Homework for Pulley
- giacomh
- · Replies 4 ·
Electricity and magnetism (magnitude of magnetic field)
- swankymotor16
- · Replies 7 ·
Block sliding up an inclined plane lab
- TrpnBils
- · Replies 13 ·
Time to slide down a ramp w/ no friction
- TrpnBils
- · Replies 23 ·
Electricity and magnetism (magnitude of current flowing)
- swankymotor16
- · Replies 2 ·
Projectile Motion So many Unknowns
- orangem
- · Replies 21 ·
A wire segment 1.2 m long carries a current I = 3.5 A
- Curious314
- · Replies 7 ·
Damped Driven Harmonic Oscillator
- AbigailM
- · Replies 4 ·
Static Equilibrium problem results not well understood. Please help.
- zacc
- · Replies 4 ·
Solving 2D Elastic Collision of (3.5 kg, 5 kg) Bodies
- Zeeshan86
- · Replies 9 ·
Circular Motion Power: Why Isn't Work Done Equal to Zero?
- hqjb
- · Replies 56 ·
2D collision, both angles given, both final velocities unknown.
- joshonator
- · Replies 7 ·
Asymmetric tuning fork, and fender rhodes
- zorgzorg2
- · Replies 9 ·
Does Heat Cause Area Expansion? Understanding the Expansion of Materials
- hms.tech
- · Replies 1 ·
Question in momentum of inertia
- manal950
- · Replies 8 ·
Rate of entropy generation (can it be negative?)
- JJBladester
- · Replies 7 ·
What is the Average Force Exerted on Occupants by Seatbelts in a Car Collision?
- dan1995420
- · Replies 1 ·
Point of equilibrium between charges
- pilotguy
- · Replies 16 ·
Linear motion with variable forces
- jiayingsim123
- · Replies 4 ·
Constructing a Tri-Axial Square Helmholz Coil
- rushingwind
- · Replies 5 ·
Root mean square speed of helium atom
- dlthompson81
- · Replies 15 ·
Help on an acceleration problem (Deceleration?)?
- dranly1
- · Replies 3 ·
What is the density of the liquid?
- jgridlock
- · Replies 1 ·
What Factors Affect the Resistance and Drift Velocity of a Copper Wire?
- pilotguy
- · Replies 6 ·
Micrometer Scale Division Calculation
- tsi poera
- · Replies 1 ·
Linear motion with variable forces
- jiayingsim123
- · Replies 2 ·
Rotational Motion Homework: Find Kinetic Energy of Rod
- Saitama
- · Replies 4 ·
Newton's 2nd Law: What is the Definition?
- jinhuit95
- · Replies 2 ·
Calculating Impulse in a Tennis Ball Collision with a Wall
- NRasmus1
- · Replies 6 ·
What happens in a short circuit situation (parallel)?
- JJBladester
- · Replies 5 ·
Calculating Work Done When Moving a Uniform Ladder
- Jimbo57
- · Replies 15 ·
Cost of Running Mrs Keely's Washing Machine per Year
- Ryanzmw
- · Replies 2 ·
The voltage of the 2uf capacitor will be the sum of the two source voltages.
- dreamz25
- · Replies 2 ·
What is the Relationship Between Angular Momentum and Swing Angle for a Rod?
- roam
- · Replies 5 ·
Why Does Paper Char First Where It Covers Wood in a Composite Rod Experiment?
- sgstudent
- · Replies 3 ·
Oscillating bucket, variable mass
- amiras
- · Replies 10 ·
Towing Sleds - Finding Tensions
- Twiggy92
- · Replies 2 ·
Adding waves to get resultant wave
- Rococo
- · Replies 2 ·
Calculating temperature with energy absorbed
- pamelajanas
- · Replies 5 ·
Mass collides with spring and mass
- NRasmus1
- · Replies 2 ·
Interesting physics experiment
- gokuls
- · Replies 2 ·
Charge through a coil in a magnetic field
- pc2-brazil
- · Replies 6 ·
Expressions of travelling harmonic wave equation
- vodkasoup
- · Replies 5 ·
Calculating the loss in mechanical energy due to a collision
- NRasmus1
- · Replies 1 ·
Height of an different objects along a curved incline
- sara167
- · Replies 14 ·
The earth takes exactly 24 hours for one full rotation calculate
- sazzy
- · Replies 3 ·
Solve Jumper Question Homework: Part A & B with Initial Speed & Force
- dkirov1
- · Replies 2 ·
Momentum of variable mass system - train & rain
- Beelzebro
- · Replies 1 ·
Does It Matter Which Vector You Start With When Using the Parallelogram Rule?
- mpaige1
- · Replies 3 ·
Two blocks sliding on one another.
- Gravitational
- · Replies 1 ·
How do the Doppler Effect and beat frequencies explain sound wave phenomena?
- IIK*JII
- · Replies 2 ·
Find Tractive Force of 3000KN Weight Train in 1 min
- manal950
- · Replies 18 ·
Max Energy Stored in Magnetic Field from Elastic Collision of Carts"
- hybridized
- · Replies 8 ·
Questions concerning Dopplers Effect and Wave Phenomena
- Daaniyaal
- · Replies 1 ·
What forces act upon this system and where?
- nickdwaters
- · Replies 2 ·
Final charges on the capacitors
- thunderhadron
- · Replies 7 ·
Problem concerned to kinematics
- Mareena
- · Replies 1 ·
Optics-Lenses- 1cm thick glass slide is perpendicularly set
- Giuliaa
- · Replies 1 ·
Rotation and Tension in Strings
- roam
- · Replies 4 ·
Master Projectile Motion Problems with Expert Tips and Solutions
- ricky23i
- · Replies 3 ·
Calculating constant velocity, deceleration, and total displacement
- pamelajanas
- · Replies 4 ·
Circular Motion: Find Angle of Inclination of String
- jinhuit95
- · Replies 8 ·
Electric potential vector or scalar sum?
- rickywaldron
- · Replies 3 ·
Charge on 6.0-μF Capacitor at 40V: 240microC
- Curious314
- · Replies 1 ·
Outlets on a household circuit are arranged in
- Curious314
- · Replies 7 ·
How long does it take for the box to move from -2.2 m to +2.2 m?
- SalsaOnMyTaco
- · Replies 5 ·
Replace Fuses with Higher Ratings: True or False?
- Curious314
- · Replies 7 ·
What Does hp Represent in Power Units?
- sybozo
- · Replies 3 ·
Solving RPM Problems: Understanding Maximum Speed and Revolutions
- sybozo
- · Replies 2 ·
Fields and Schwartzchild radius for a black hole
- hybridized
- · Replies 2 ·
How Does Friction Affect Falling Objects?
- hybridized
- · Replies 6 ·
Projectile motion question ( basketball being thrown into a hoop)
- mihir23
- · Replies 2 ·
A 9 volt battery is hooked up to two resistors in series
- Curious314
- · Replies 2 ·
K Concentration on Earth Over Time
- ilona
- · Replies 1 ·
Solving a Homework Statement: Finding Forces and Distances
- StrawHat
- · Replies 2 ·
A spacecraft encounters a stationary dust cloud of density rho.
- AbigailM
- · Replies 2 ·
Torque, Angular Displacement, Work
- warrior2014
- · Replies 6 ·
A battery is responsible for supplying a constant current to a circuit?
- Curious314
- · Replies 3 ·
Formula for working out power produced by petrol being burnt in an engine
- clifftifer
- · Replies 2 ·
Problem concerned to kinematics
- Mareena
- · Replies 1 ·
Calculate cangular momentum vector L
- classicphysic
- · Replies 4 ·
Angular Frequency and In-Phase Motion: A Scientific Inquiry
- smith873
- · Replies 2 ·
Simple Harmonic Motion for a block-spring system
- obxer22
- · Replies 2 ·
Find Torque given Angular momentum and time
- btlogan2
- · Replies 3 ·
Finding Spring Constant through Simple Harmonic Motion
- SalsaOnMyTaco
- · Replies 1 ·
Gravitational Force Homework: 3 Spheres, Masses, Distance
- wbetting
- · Replies 1 ·
Sphere in a horizontal plane + Projectile movement
- frank1
- · Replies 8 ·
What note does a listener hear when a singer gulps helium and sings middle C?
- amit25
- · Replies 20 ·
Universal gravitation 2- determine the planet's orbital period
- dani123
- · Replies 1 ·
Universal gravitation 4-determine the weight of astronaut on planet Z
- dani123
- · Replies 17 ·
What is the maximum height reached by a ball released from a spring-loaded tray?
- amiras
- · Replies 5 ·
Middle Ear Amplifies Sound Waves: 30dB Reduction
- ilona
- · Replies 14 ·