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 Long Does a Pitch Take to Reach Home Plate?
- evelinm
- · Replies 2 ·
Why Is the Angle 5.6° in Young's Double Slit Experiment?
- libbytam
- · Replies 1 ·
How Long Until the Arrow Hits the Rock in Helm's Deep?
- LeHotDoge
- · Replies 4 ·
Dimensional Analysis: Solving E = (1/2) mv Equation
- Michele Nunes
- · Replies 5 ·
What is the displacement and velocity of a falling object after 1.0 s?
- Lana Elcic
- · Replies 6 ·
Finding the Equilibrium Position for Three Charges
- Fireupchip
- · Replies 4 ·
Net force on rectangular circuit
- Alameen Damer
- · Replies 7 ·
Y component of electric field due to line of charge
- Mddrill
- · Replies 3 ·
Force exerted on Earth by accelerating ball
- Entr0py
- · Replies 4 ·
Finding net electric field from three point charges
- idkwhatimdoing
- · Replies 2 ·
Work done by gas when pressure rises with square root of volume
- JJ363636
- · Replies 14 ·
Finding charge magnitude for two hanging balls at 37 degrees
- pawlist
- · Replies 5 ·
When is the force of gravity 0?
- Alameen Damer
- · Replies 7 ·
Which way does a candle flame point on a rotating plate?
- korec123
- · Replies 6 ·
Using relative motion to find direction and time of a boat
- PAstudent
- · Replies 2 ·
Electrostatics (four equal point charges)
- Antonius
- · Replies 14 ·
Horizontal and vertical component for electric field
- ToonBlue
- · Replies 6 ·
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 ·
Time and distance for one car to overtake a stationary accelerating car
- 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 ·
Finding the point where Earth and Moon's gravity balance
- 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 ·
Finding EMF and R in circuit with 3.4 A ammeter and 6 V voltmeter
- 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 ·
Why does terminal PD subtract internal resistance for one cell but add it for another?
- Janiceleong26
- · Replies 9 ·
The position of a point in 2 rotations with 2 axes
- Gh778
- · Replies 4 ·
Boulder rolling off cliff 400 m high: does it land in the pond?
- Entr0py
- · Replies 16 ·
A train travels between two stations
- DeathEater
- · Replies 5 ·
Conditions for light to travel along an optical fiber by 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 average speed over three gears
- iamchattha
- · Replies 15 ·
Kinematics in one direction - relative velocity word problem
- r26h
- · Replies 2 ·
Radius of curvature and speed rate of change for a projectile at specific times
- 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 ·
Determining speed of sound from doppler effect circular motion data
- 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 ·
Angular momentum of two rotating hollow spheres with decreasing separation
- Raphael M
- · Replies 1 ·
Change in medium and its effect on sound
- faiziqb12
- · Replies 5 ·
Electric force-finding coordinate
- psysicsfeet
- · Replies 3 ·
Calculating torque to displace a spinning disc with a lever
- 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 ·
Inelastic collision: does energy loss depend on car mass?
- Drizzy
- · Replies 28 ·
Saturated liquid in tank cooled from 0.2 MPa to 0.1 MPa at constant volume
- JasonHathaway
- · Replies 4 ·
Rocket with 100 kg fuel: why two calculation methods give different max heights
- Breadsticks
- · Replies 1 ·
Activity of cobalt-60 and age of a decayed sample
- 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 ·
Normal force on a crate with a person standing on it
- Pizza Dave
- · Replies 3 ·