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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Two electric fields perpendicular to each other -- how?
- gracy
- · Replies 22 ·
Finding potential inside the cavity of a Conductor
- xcgirl
- · Replies 1 ·
Gauss' Law: Charge enclosed zero = E field zero?
- AKJ1
- · Replies 3 ·
Really easy but difficult problem with temps
- korec123
- · Replies 8 ·
How Long Does It Take for One Car to Overtake Another?
- Demio Crush
- · Replies 5 ·
Finding the Initial Temperature of Water in a Calorimeter: A Calorimetry Problem
- annedi
- · Replies 2 ·
Force on table/chair rolling back
- Entr0py
- · Replies 1 ·
Calculating Mass and Acceleration with Constant Force and Distance Traveled
- annedi
- · Replies 11 ·
Calculate Force of Gravity of Earth and Moon | FgE = FgM | 3.8 x 10^7 Answer
- Alameen Damer
- · Replies 4 ·
What is the angle between a rolling ball and the surface it leaves?
- Ihatemiu
- · Replies 7 ·
Mass, Temperature, and Relativity?
- dykuma
- · Replies 8 ·
Projectile Motion: Firing range
- Scorry
- · Replies 4 ·
Finding theta of a charged pendulum
- whitejac
- · Replies 8 ·
I'm making an Arithmetic Error, Electrostatic force diagrams
- whitejac
- · Replies 4 ·
Size of the friction force felt?
- EricMatthew
- · Replies 4 ·
Particle's Movement in a Uniform Electric Field
- Krysrhap
- · Replies 1 ·
How to Calculate Electric Field at a Point for Physics 12 Electromagnetism?
- Alameen Damer
- · Replies 18 ·
Calc EMF: Find ε & R in Circuit w/ 3.4 A & 6 V
- Draconifors
- · Replies 17 ·
How do I know that I should do a vector addition for this?
- Blockade
- · Replies 2 ·
Frequency spectrum in Doppler effect
- yulija
- · Replies 1 ·
Physics 12 Electric Energy Question
- Alameen Damer
- · Replies 13 ·
Calculating Displacement, Velocity, and Acceleration of a Harmonic Wave Train
- Nishikino Maki
- · Replies 6 ·
Momentum, Impulse, Area under curve
- Ocata
- · Replies 11 ·
What Is Archimedes' Principle?
- Drizzy
- · Replies 6 ·
Electric Charge Applied on Two Wires of Electroscope?
- TrivialPants
- · Replies 3 ·
Kirchhoff's 2nd Law: Terminal PD Calculation Homework
- Janiceleong26
- · Replies 9 ·
The position of a point in 2 rotations with 2 axes
- Gh778
- · Replies 4 ·
Boulder rolling off of cliff: will it hit the village?
- Entr0py
- · Replies 16 ·
A train travels between two stations
- DeathEater
- · Replies 5 ·
MC (multiple choice) question about total internal reflection
- cainko
- · Replies 11 ·
How Do You Determine George's Direction Relative to John in a Strawberry Field?
- TevinCollege
- · Replies 2 ·
Racing Car's Avg Speed: Find the Answer!
- iamchattha
- · Replies 15 ·
Kinematics in one direction - relative velocity word problem
- r26h
- · Replies 2 ·
Football Trajectory: Radius & Speed Rate of Change
- bkw2694
- · Replies 16 ·
Confusion regarding cos or sin
- joker2014
- · Replies 8 ·
Final temperature of ice mixed with water
- Pouyan
- · Replies 9 ·
What does "vertical plane" mean in physics?
- Danya314
- · Replies 6 ·
Nitrogen in a cylinder - temperature, work and volume
- Rectifier
- · Replies 14 ·
How is Density Related to Depth in the Ocean?
- bigplanet401
- · Replies 3 ·
Significant figures vs precision (I think)
- gijoel
- · Replies 3 ·
Physics magnitude and direction?
- amber_hsk
- · Replies 4 ·
Need help with physics experiment (Speed of sound)
- yulija
- · Replies 1 ·
Using vectors as a function of time
- PAstudent
- · Replies 4 ·
Atwood Machine, deriving equation for acceleration
- mmoe
- · Replies 1 ·
How long does it take to reach the ground?
- Lana Elcic
- · Replies 3 ·
Finding dot product, cross, and angle between 2 vectors
- PAstudent
- · Replies 3 ·
What is the Missing Piece in Solving for ρ in this Simple Problem?
- MadMatSci
- · Replies 8 ·
Find the Speed of an Electron in the lab frame
- B3NR4Y
- · Replies 8 ·
Calculating Torque on a Dam Due to Water
- bigplanet401
- · Replies 3 ·
Collision Experiment: Momentum, Impulse and Conclusions
- Drizzy
- · Replies 16 ·
Finding voltage across a resistor in a circuit
- nothing909
- · Replies 21 ·
Calculating Momentum Change in Car-Plastic Collision
- Drizzy
- · Replies 8 ·
Need some explanation for this physics answer (E-field due to charges)
- ToonBlue
- · Replies 2 ·
Doubts on angular momentum [master's degree exam]
- Raphael M
- · Replies 1 ·
Change in medium and its effect on sound
- faiziqb12
- · Replies 5 ·
Electric force-finding coordinate
- psysicsfeet
- · Replies 3 ·
Physics Experiment Help (Torque, Angular Momentum, etc)
- OrangePotatoCat
- · Replies 24 ·
Calculating Efficiency and Work in Otto Cycle Engine
- JasonHathaway
- · Replies 1 ·
Kinematics 1-D Problem. Stuck on specific parts.
- Jabran Shakil
- · Replies 5 ·
[mechanics] radius of a sphere with critical mass
- Rijad Hadzic
- · Replies 4 ·
Mass changed if q is produced by adding to electrons mass
- Physics2341313
- · Replies 1 ·
Convert m/s to N? Chart Vectors Graphically
- tvshonk
- · Replies 3 ·
Apparent vs. actual speed for moving star
- QuantumCurt
- · Replies 3 ·
Using Gauss' law for spherical charge distribution
- Physics2341313
- · Replies 1 ·
Calculate flux from a radiating disk
- forestmine
- · Replies 26 ·
Conclude Collision Experiment: Car Mass & K.E.
- Drizzy
- · Replies 28 ·
Solving Homework: Find Final State, Mass, Work & P-v Diagram
- JasonHathaway
- · Replies 4 ·
Help with max rocket height. Heights differ with methods.
- Breadsticks
- · Replies 1 ·
Yes, your solutions for both parts (a) and (b) are correct. Good job!
- Rectifier
- · Replies 13 ·
What is the optimal shape of a membrane on a rectangle under pressure?
- skrat
- · Replies 65 ·
What are the thermodynamic properties and efficiency of a steam plant?
- JasonHathaway
- · Replies 9 ·
Question on Statics -- San Francisco Bay Bridge Bolts
- in the rye
- · Replies 1 ·
How to extract information from question given that u=0
- gracy
- · Replies 3 ·
Find the equilbrium temperature
- WeiLoong
- · Replies 5 ·
How Can You Find Forces P, F, and T in a Static Equilibrium Problem?
- Handsome jack
- · Replies 14 ·
Conversion from molar mass to mols
- Rectifier
- · Replies 4 ·
Force given velocity as function of space.
- deblimp
- · Replies 5 ·
Derive linear relations from special relativity formulae
- VoteSaxon
- · Replies 3 ·
First law of thermodynamics applied to a closed system
- Luchekv
- · Replies 22 ·
How to Find the Capacitance of an Isolated Ball-Shaped Conductor?
- Shreyas Shree
- · Replies 2 ·
Current and resistance in series and parallel circuits
- RelativeJosef
- · Replies 3 ·
Calculating the Age of a Sample Using Carbon-14 Dating
- Rectifier
- · Replies 20 ·
Calculate Normal Force: Crate & Person on Floor
- Pizza Dave
- · Replies 3 ·
Forces acting on two stacked blocks
- manaXmizery
- · Replies 1 ·
Find the buildings height for two balls to land @ same time
- proto3210
- · Replies 1 ·
What is the x component of .... ?
- Manh
- · Replies 3 ·
Why is gravitational potential energy negative?
- bigplanet401
- · Replies 3 ·
How many seconds will it take before the cars meet?
- Lana Elcic
- · Replies 3 ·
Electrostatic and gravitational force
- psysicsfeet
- · Replies 1 ·
Projectile motion from the ground
- Scorry
- · Replies 3 ·
Projectile Motion, Find Gravity
- fgc_grapplerGOD
- · Replies 6 ·
FBD for Newton's Law of Motion Problem
- VaioZ
- · Replies 3 ·
Different cases of work done done by 3 conservative forces
- Titan97
- · Replies 5 ·
Calculating magnitudes of vectors
- PAstudent
- · Replies 1 ·
I feel like such an idiot (Help please with unit conversions)
- APAlex
- · Replies 14 ·
Tension in the string and tangential accleration
- Hamza Abbasi
- · Replies 11 ·
Mechanics Question -- Ball bearing on top of an accelerating car
- JM samuel Liu
- · Replies 3 ·
Calculating Distance Traveled by a Honking Car and Echo
- B3NR4Y
- · Replies 18 ·
What's the energy of a rotating bearing?
- Karol
- · Replies 17 ·