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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Calculating Distance Between Two Speakers Producing 180Hz Sound in Phase
- lilkrazyrae
- · Replies 9 ·
What is the Velocity of a Person at the Equator?
- nrc_8706
- · Replies 15 ·
Understanding Period and Frequency in Waves and Pressure Changes
- Seiya
- · Replies 2 ·
Colliding blocks attached to a spring - How is the spring compressed
- tbomber
- · Replies 1 ·
What Happens to the Force on Charged Particles When They Move Apart?
- comtngal
- · Replies 1 ·
Calculating Electron Speed in a Magnetic Field
- Andreii
- · Replies 1 ·
Find Speed of Light in Medium with Index of Refraction
- oooo
- · Replies 2 ·
Some Applications of Newton's Laws of Motion
- KD
- · Replies 6 ·
Does an Electric Field Exist Inside a Conductor?
- leelee
- · Replies 1 ·
Line of best fit outside error bars for one point
- † please_help_me †
- · Replies 1 ·
Output rating of the pump motor in watts
- howru
- · Replies 1 ·
Thermal Expansion in an aluminum plate
- SoccaCrazy24
- · Replies 1 ·
Calculating Pressure Change in Combustion Cylinder
- Soaring Crane
- · Replies 5 ·
Potential Energy Q: 1000kg Cart on Hill, Kinetic/PE/Velocity?
- thewiz
- · Replies 3 ·
Rock whirling in vertical circle
- nrc_8706
- · Replies 1 ·
Calculating Torque and Force for a Mechanic's Task
- hshphyss
- · Replies 1 ·
What Is the Minimum Force Needed to Push a Tall Dresser Across the Floor?
- amcavoy
- · Replies 1 ·
Find final speed of the astronaut after throwing the tank
- b40677
- · Replies 3 ·
Tension, period and speed of a 1 kg conical pendulum at 30 degrees
- Equilibrium
- · Replies 3 ·
Understanding Flux in a Toroidal Coil of Wire
- square_imp
- · Replies 2 ·
Period, velocity, acceleration of a spring
- lilkrazyrae
- · Replies 1 ·
What Is the Shock Wave Cone Half-Angle at Mach 2.30?
- lilkrazyrae
- · Replies 1 ·
Destructive Interference with Different Wave Shapes
- msimard8
- · Replies 1 ·
Open and closed manometers with mercury
- Soaring Crane
- · Replies 4 ·
Can Rev/s and Hz Represent the Same Frequency Measurement?
- asdf1
- · Replies 6 ·
Finding Harmonics: Frequency Multiplication?
- lilkrazyrae
- · Replies 3 ·
Finding force vector given position and torque vectors
- DOMINGO79
- · Replies 4 ·
How to Calculate the Wavelength of a 106.5 MHz FM Radio Signal?
- lilkrazyrae
- · Replies 5 ·
How to Solve a Physics Problem Involving Newton's Laws and Weight Measurements
- Number Lover
- · Replies 13 ·
Equation of motion for two springs with different constants and mass
- brad sue
- · Replies 3 ·
Centripetal Acceleration: Solving Physics Circular Motion
- jesuslovesu
- · Replies 2 ·
Artificial Gravity: Calculating Centripetal Acceleration
- alfredbester
- · Replies 4 ·
How Much Would You Weigh on a Smaller Planet?
- brad sue
- · Replies 6 ·
Sound pressures at the open end
- ivanhooace
- · Replies 3 ·
What Happens to Potential Energy When Height Approaches Infinity?
- Kamataat
- · Replies 10 ·
How to Determine the Coefficient of Friction for a Block?
- 11thgradephysics
- · Replies 5 ·
Momentum/velocity questions (very simple)
- kaitamasaki
- · Replies 1 ·
How do I Calculat on distance in Catapult project
- colombo
- · Replies 5 ·
Lowest Average Speed of Gases at 25C: H2S
- Soaring Crane
- · Replies 1 ·
How Do You Calculate Torque in Mechanical Situations?
- hshphyss
- · Replies 1 ·
Solving the Safety vs. Aerodynamic Efficiency Dilemma
- Shehezaada
- · Replies 1 ·
One dimensional motion with friction
- mahdilm
- · Replies 3 ·
How many initial conditions needed to find angular displacement from angular acceleration?
- jjiimmyy101
- · Replies 3 ·
Calculating Average Power for a 55kg Woman Running Up a Flight of Stairs
- gr3g1
- · Replies 2 ·
Particle in a Box: U=0 Inside, ∞ Outside
- asdf1
- · Replies 3 ·
How Do Force and Friction Affect a Rolling Wheel's Motion?
- brad sue
- · Replies 2 ·
Rotating space station ring to simulate Earth gravity
- Student(st.john's)
- · Replies 2 ·
Minimum muzzle velocity of a bullet that melts on impact
- Physic_Scholar
- · Replies 3 ·
How can we solve a conical pendulum using principles of physics?
- Equilibrium
- · Replies 1 ·
How do you find density when given the buoyant force
- BryanC
- · Replies 5 ·
Build a Coin-Throwing Catapult in 2 Weeks
- mcoy
- · Replies 5 ·
How much would a DNA screen reveal about personality and intelligence?
- BBboy
- · Replies 1 ·
Athlete Long-Jump Question, Don't Know Where I've Gone Wrong
- lando45
- · Replies 4 ·
How Do You Calculate the Density and Submerged Weight of a Metal Object?
- RMHAZARD
- · Replies 6 ·
Calculating Net Gravitational Field Strength Between a Planet and the Sun
- kingyof2thejring
- · Replies 6 ·
Angular Momentum of a turntable
- kreil
- · Replies 2 ·
Solving Harry's Boomerang Problem: Find Tom's Reaction Time
- vaishakh
- · Replies 1 ·
Find load with jack and piston
- lilkrazyrae
- · Replies 1 ·
The section of my physics book on sound makes no sense
- Tim.thelion
- · Replies 5 ·
Power dissipated in a thermistor at different temperatures
- fran008
- · Replies 1 ·
Simple Harmonic Motion - seemingly easy yet
- Shadow Cloud
- · Replies 7 ·
How Is Kinetic Energy Distributed in an Explosive Breakup?
- B-80
- · Replies 20 ·
Throwing a ball from the roof of a building
- lando45
- · Replies 4 ·
Percentage of a wooden block that floats above water
- powerbuddy
- · Replies 8 ·
Calculating Angular Velocity and Angle on a Game Show Wheel
- ohsofoineazn
- · Replies 2 ·
Static Equilibrium Problem from Halliday, Resnick
- mahdilm
- · Replies 9 ·
Wave generator: wavelengths, period, and standing wave frequency
- skyblue112
- · Replies 6 ·
Fluids - I wish the answer would flow to me
- stuplato
- · Replies 7 ·
Newton's Law of Gravitation problem
- Shadow Cloud
- · Replies 7 ·
How Accurately Can the Position of a Proton Be Determined at High Speeds?
- Ve3Mike
- · Replies 3 ·
Change in momentum when a ball rebounds from the ground
- fabbo
- · Replies 6 ·
How Long Does It Take for a Boat to Decelerate from 90 km/h to 45 km/h?
- vaishakh
- · Replies 2 ·
Evacuatred chamber pressure question
- Kristin
- · Replies 1 ·
How Much Pressure Is Needed to Inject Water at 1.5g/s Through a Tiny Needle?
- SoccaCrazy24
- · Replies 1 ·
Finding Q transferred from a PV graph and in isochoric processes
- Dooh
- · Replies 1 ·
Struggling with Momentum and Energy Problems?
- Infamo
- · Replies 3 ·
Calculate time to raise temperature of water
- polyperson
- · Replies 7 ·
Motion: Understanding Force Displacement
- IonAphis
- · Replies 1 ·
Strain Energy: Potential Power in Stretching
- KatieKangaroo
- · Replies 1 ·
Space shuttle angular velocity and rotating disks with friction
- Inquiring_Mike
- · Replies 1 ·
Toroid shape Electro-Mag question
- square_imp
- · Replies 1 ·
How Does the Right-Hand Rule Determine the Direction of Magnetic Force?
- dekoi
- · Replies 3 ·
Is the Calculated Torque on a Bolted Beam Correct?
- vbplaya
- · Replies 1 ·
Is this a doppler effect problem?
- cheez
- · Replies 1 ·
Solve Calculation: Mass of Ice Melted with Carrots at 100°C
- fabbo
- · Replies 2 ·
Estimating Temperature and Wavelength of a Light Bulb Filament
- Brewer
- · Replies 5 ·
Wavelength of a wave from distance between compressions or separation
- msimard8
- · Replies 4 ·
Rigid Bodies and Free Body Diagrams (w pulley)
- moo5003
- · Replies 1 ·
2 Cars Colliding with same mass
- YinHoNg
- · Replies 1 ·
What is the outcome of a collision between two cars at constant speed?
- YinHoNg
- · Replies 4 ·
Calculating Efficiency of a Coal Fired Plant - 700 MW Electrical Power
- saved56
- · Replies 1 ·
Solving the Hardest Thermal Process Question: Find W/Q Ratio
- Dooh
- · Replies 1 ·
Challenging Physics Question (Mass moment of inertia, pendulum)
- patrat
- · Replies 2 ·
What Force Does a Tractor Exert to Tow a Trailer Up an Incline?
- kayteedee
- · Replies 8 ·
Solve Hard Thermodynamics Q: Find Water W/Q Ratio
- Dooh
- · Replies 1 ·
Beat frequency of Two in-phase loudspeakers
- frozen7
- · Replies 3 ·
Height, hangtime, and range during frictionless freefall.
- pwoodruff89
- · Replies 11 ·
How Does the Biot-Savart Law Apply to an Electron Orbiting a Proton?
- dekoi
- · Replies 1 ·
Speed of object falling from pulley
- suspenc3
- · Replies 6 ·