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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Why is the speed of sound from a jet moving at 100m/s through air still 340m/s?
- Gear2d
- · Replies 1 ·
What Is the Maximum Speed of a Trebuchet's Payload?
- Zukie91
- · Replies 19 ·
How Does Electron Drift Speed Affect Current Flow in Copper Wires?
- carus88
- · Replies 1 ·
Contraction of spring colliding with balls
- devanlevin
- · Replies 1 ·
Hard Projectile Motion Question
- emmettecox
- · Replies 5 ·
Spring oscillation amplitude when lift stops suddenly
- hemetite
- · Replies 4 ·
Finding Current and potential difference in a circuit
- Number1Ballar
- · Replies 16 ·
How to calculate rate of tank pressure change
- Alfredo78
- · Replies 6 ·
How Can Polarization of Light Lead to Further Component Extraction?
- Vanush
- · Replies 1 ·
Projectile motion graph problems
- OhyesOhno
- · Replies 2 ·
Calculating Charge in an Earth Electric Field: Gauss' Law
- carus88
- · Replies 2 ·
How to calculate the percentage error in speed
- smarties
- · Replies 7 ·
How Can Relativistic Space Travel Affect Aging and Distance Measurements?
- trans_pie
- · Replies 4 ·
Normalizing a Wavefunction of a harmonic oscillator
- Bready
- · Replies 7 ·
How Does Changing Distance Affect Force Between Charges?
- dummie90
- · Replies 1 ·
How Do Tension and Spring Forces Work in Different Parts of a String?
- ritwik06
- · Replies 6 ·
Calculating the mass of objects in ICE
- smarties
- · Replies 2 ·
Two-lens system with virtual and real object positions
- Gear2d
- · Replies 1 ·
Calculate Period of Leg of 1.75m Tall Man (68 kg)
- hot2moli
- · Replies 1 ·
Factors Affecting Capacitance in a Capacitor
- Gear2d
- · Replies 2 ·
Two beakers with volatile solvents in closed system
- black_squirrel
- · Replies 2 ·
How to Calculate Angle in Double Slit Interference with Given Variables?
- Hanga
- · Replies 3 ·
Work to pump water out of a parabolic trough
- Tranquility13
- · Replies 11 ·
Calculating the Tension in Steel I-Beam Cables
- rwofford
- · Replies 12 ·
Aircraft turning 14 degrees east from northbound flight
- bex4321
- · Replies 13 ·
Does a diatomic molecule vibrate at T=0 despite zero point energy?
- learning_phys
- · Replies 2 ·
Does the hydrogen atom have a spin?
- learning_phys
- · Replies 3 ·
Calculating Heat Expelled from a Heat Pump
- jdog6
- · Replies 6 ·
How Does Heat Pump Performance Vary Between Northern and Southern Climates?
- sapiental
- · Replies 7 ·
Velocities due to angular rates
- steenaap
- · Replies 2 ·
Easy question but I get a crazy answer
- sai2020
- · Replies 6 ·
Deriving Average Energy of an Oscillator: Thermal Radiation
- sai2020
- · Replies 2 ·
Relationship of velocity of the impact to crater depth
- yiuscott
- · Replies 2 ·
Solving Vector Problems: Finding Magnitudes and Angles with A = 4
- Maximillien
- · Replies 1 ·
Finding forces on a painting hung by thread on a nail
- shanie
- · Replies 7 ·
Walking on a board on frictionless surface
- black_squirrel
- · Replies 10 ·
How Do Water and Mercury Pressures Compare in Different Height Containers?
- Gear2d
- · Replies 1 ·
Can you prove the Earth is round by mathematical equation?
- chewy11577
- · Replies 8 ·
Are vibrations in diatomic molecules quantized?
- learning_phys
- · Replies 14 ·
Force up inclinded hill question
- usagi101
- · Replies 1 ·
What is the final translational rms speed of the atoms
- stellies
- · Replies 12 ·
Solving a Ball Dropped from 1.75m: Velocity and Impulse Calculations
- shanie
- · Replies 2 ·
Electric flux trough an infinite plane 2
- julius71989
- · Replies 2 ·
Relativistic calculations - when to use them?
- Darth Geek
- · Replies 5 ·
Conduction through a spherical shell.
- kristen32123
- · Replies 1 ·
Solving a Car Collision: Kinetic Energy & Force
- shanie
- · Replies 4 ·
What is an elastic medium and how do two wave sources interact in it?
- tommelion
- · Replies 1 ·
Why Do Different Elements Have Unique Spectral Lines?
- learning_phys
- · Replies 1 ·
How Do Stark and Zeeman Effects Break Degeneracy in Atomic Systems?
- learning_phys
- · Replies 4 ·
How far will it slide before stopping?
- sweet_calyn04
- · Replies 1 ·
How does halving pipe radius affect velocity in an ideal fluid?
- Gear2d
- · Replies 1 ·
Total kinetic energy vs total potential energy of a system
- jimseng
- · Replies 1 ·
Problem with ideal gas pressure
- ttkingdom
- · Replies 1 ·
Calculate Water Speed in Venturi Meter
- ahello888a
- · Replies 2 ·
Force on Moving Charges in a Magnetic Field
- Number1Ballar
- · Replies 1 ·
An electromagnetic induction question
- herich
- · Replies 2 ·
Solenoid flux-emf-current problem
- crbnmnxd3
- · Replies 3 ·
Work done by gas heated at constant pressure in a cylinder
- Perrin
- · Replies 4 ·
Gauss's Law for cylindrical metal tube enclosing a wire (coaxial cable)
- Einstein2nd
- · Replies 10 ·
How to find the distance of an object from the mirror in photography
- WardenOfTheMint
- · Replies 1 ·
Find Friction Constant in Lisa's Carousel Problem
- shanie
- · Replies 5 ·
Toboggan sliding at constant velocity on an 8° slope
- shimshi_o4
- · Replies 3 ·
Photoelectric effect: maximum and minimum kinetic energy at 180nm
- carus88
- · Replies 4 ·
Negative potential energy and coulomb force
- learning_phys
- · Replies 11 ·
Can Wearing a Kevlar Helmet Protect You from Falling Bullets?
- 1337
- · Replies 3 ·
Building a rat trap operated car
- Aaron321
- · Replies 2 ·
Solving Problems with Work, Energy, and Power
- Caraniah
- · Replies 2 ·
Calculating the Velocity of a Block on an Inclined Plane with Friction
- monarchus
- · Replies 3 ·
Solving a Downward Motion Problem: Velocity of an Object
- Alime
- · Replies 2 ·
Calculating the Momentum of a Proton with a Kinetic Energy of 750MeV
- UAPhys03
- · Replies 15 ·
How do I determine the energy stored in an inductor after 2 seconds?
- homomorphism
- · Replies 2 ·
Electric field and gravitational field question
- strawberrysk8
- · Replies 2 ·
Converting 112km/h per minute to m/s²
- nads_82
- · Replies 4 ·
Magnetic fields and lines of flux
- DecayProduct
- · Replies 1 ·
Is Combining a Heat Engine and Heat Pump a Perpetual Motion Machine?
- Gear300
- · Replies 5 ·
How much energy is required to ionize the hydrogen atom
- Laxman2974
- · Replies 2 ·
Understanding what i did wrong on my exam
- HighVoltage
- · Replies 1 ·
Why do plastics have lower modulus and strength than metals?
- yong1986
- · Replies 2 ·
Frequency Patterns when Moving Microphone from 0-90 Degrees
- asiaduuude
- · Replies 2 ·
How Does Torque Influence Angular Displacement in the Titanic's Anchor System?
- hot2moli
- · Replies 8 ·
Why does L=mrω give a different result than L=nh/2π for n=3?
- apunisheriii
- · Replies 7 ·
Calculate the approximate frequency of the C-H bond
- hot2moli
- · Replies 3 ·
Location final image diveraging and converging lens
- crazyog
- · Replies 7 ·
Maximum velocity and acceleration in SHM with given amplitude and period
- hot2moli
- · Replies 5 ·
Mass of Oxygen Withdrawn from Tank at 28.0 atm
- hot2moli
- · Replies 5 ·
Elastic Collision of a ball and an elephant
- kaka2007
- · Replies 4 ·
Specific Heat Capacity question
- Sabellic
- · Replies 3 ·
Speed of a person jumping off a building?
- Sylvias
- · Replies 8 ·
How Can I Solve These Physics Problems on Circular Motion and Weightlessness?
- the_awesome
- · Replies 1 ·
Doppler effect with no given numbers
- rissa_rue13
- · Replies 17 ·
Creating an Image 2x Size of Object w/ Convex Lens: Half Focal Length Away
- Gear2d
- · Replies 3 ·
Distance between m=0/m=1 bright fringes
- crazyog
- · Replies 1 ·
Seperation between central bright frindge and third dark frindge
- crazyog
- · Replies 5 ·
Minimum thickness of thin film constructive interference
- crazyog
- · Replies 5 ·
Finding the volume of one mole of iron from mass and density
- blipped
- · Replies 3 ·
How Far Will a Sliding Cylinder Travel Before It Rolls Without Sliding?
- giladbr
- · Replies 1 ·
Understanding Negative Lateral Magnification in Optics
- Gear2d
- · Replies 2 ·
Is My Wave Equation Correct for These Parameters?
- rugapark
- · Replies 4 ·
Can We Calculate the Integral of the Square of a Time-Derivative Delta Function?
- xylai
- · Replies 1 ·
Why does the green part show destructive interference in Huygens principle?
- Niles
- · Replies 1 ·