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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Half-life of 90Sr: how long until 7/8 of sample decays?
- furface
- · Replies 5 ·
What is the sound intensity level of a jet at 1000 feet?
- phytitan
- · Replies 3 ·
Rotational Mechanics and Torque With Relation to planes?
- YodaSan2
- · Replies 1 ·
How Do You Calculate Tension in a Cantilever Cable System?
- slain4ever
- · Replies 1 ·
Fourier B-coefficients for a tricky f(x)
- blaksheep423
- · Replies 1 ·
Equipotentials around a charge Q
- ghostbuster25
- · Replies 1 ·
Potential Energy between two protons?
- MCATPhys
- · Replies 12 ·
Finding real examples of strain energy converting to gravitational PE
- yeah:)
- · Replies 2 ·
Cork: Solving for the Height of a Cork in a Dropped Bucket of Water
- GeneralShamu
- · Replies 1 ·
What is the threshold wavelength for this surface?
- kavamo
- · Replies 2 ·
Gauss's Law and Superposition of Fields
- gadje
- · Replies 2 ·
Phase of particles on a stationary wave
- DarkStalker
- · Replies 1 ·
O Physics: K Meson Decay and Velocity Calculation
- bon
- · Replies 1 ·
Why does an angled pencil in water appear bent and the same length?
- nilic1
- · Replies 2 ·
Pressure difference in two pipelines
- Link
- · Replies 1 ·
Quantum Tunneling Minimum Energy
- fiontie
- · Replies 1 ·
Temperature coefficient of resistance
- Philip Wong
- · Replies 2 ·
Why Is the Upward Force from Support P Not Matching My Calculations?
- slain4ever
- · Replies 5 ·
How Do You Calculate Frequency and Period in Simple Harmonic Motion?
- Paymemoney
- · Replies 6 ·
Electric field halfway between dipole isn't 0?
- MCATPhys
- · Replies 4 ·
Force Equalization on an Anchor
- rambo5330
- · Replies 4 ·
Vertical Displacement of Particle on Spring: k,m and x in Equations
- Gregg
- · Replies 3 ·
Finding initial velocity of an object thrown 30.0 m high
- Brittykitty
- · Replies 18 ·
Vertical Drop rides at amusement parks
- black_hole
- · Replies 3 ·
Time for an echo to return in a 1.50 km canyon at 245 Hz
- Brittykitty
- · Replies 6 ·
Magnetic Field Strength at a Point Along an Infinite Wire
- frostking
- · Replies 4 ·
Checking my cosine and sine answers
- db1
- · Replies 2 ·
Physics parallel circut question ( Test Exam)
- lazyboy92
- · Replies 5 ·
Calculating Min Δv for a Comet to Intersect Earth's Orbit
- bon
- · Replies 4 ·
What Equations Calculate Kinetic Energy and Work Function in Physics?
- raladin3d
- · Replies 3 ·
Magnetic Fields of Long Straight Wires
- nhartung
- · Replies 10 ·
How Much Work Is Required to Exchange q2 and q3?
- quebecois22
- · Replies 11 ·
Work and time for two vacuum cleaner motors with different power outputs
- kim032688
- · Replies 1 ·
Solve Physics: 80 kg Person Applies 2000 N Force to Ground
- Trandall
- · Replies 1 ·
Friction Pulley Problem: Can You Solve It?
- P944
- · Replies 1 ·
Electric field and potential for hexagon of six charges
- nhartung
- · Replies 8 ·
Speed and kinetic energy of electron in Bohr model ground state
- jamesjd
- · Replies 6 ·
Photoelectric Effect difficulties
- ysidfa
- · Replies 1 ·
Non-Horizontally launched Projectile
- physics(L)10
- · Replies 12 ·
Primary coil of an ideal transformer. I need an equation.
- Sarak
- · Replies 1 ·
Why some solids are electrical conductors
- Kawakaze
- · Replies 3 ·
Solving Momentum & Energy for Particles: Masses m & 3m
- Maybe_Memorie
- · Replies 7 ·
Calculating Wavelength and Speed of a Standing Wave on a String
- Mirth
- · Replies 9 ·
Calculating 25% of Gravity at Height
- RoughRoad
- · Replies 4 ·
Angular Momentum: Torque, Newton's 2nd Law, Rigid Body
- bon
- · Replies 1 ·
Maximum and minimum speeds after elastic collision of two balls
- bon
- · Replies 6 ·
Work-Energy Theorum: Spring potential energy vs Kinetic Energy
- Senjai
- · Replies 4 ·
Nuclear physics: neutral atomic mass vs. atomic mass
- rhombus
- · Replies 3 ·
Find equilibrium bond potential, given energy as a function of atomic separation
- knowlewj01
- · Replies 3 ·
Where does the potential energy go if a clamped spring is dissolved in acid?
- PrakashPhy
- · Replies 1 ·
How to find tension in a spring?
- nikkii128
- · Replies 1 ·
What are some tips for solving projectile motion problems in physics?
- DR1
- · Replies 14 ·
Relativity of simultaneity (astronaut and simultaneous explosions.)
- Gator93
- · Replies 2 ·
Hydrostatic force on submerged curved surface
- febbie22
- · Replies 5 ·
Where should a 50 g mass be suspended on a meter rule balanced on a knife-edge
- look416
- · Replies 7 ·
Motorcycle stunt-rider mechanics problem
- look416
- · Replies 2 ·
Power loss in transmission lines with 440 kW and 3 ohm resistance
- VenaCava
- · Replies 2 ·
Finding the zero gravity point between Earth and Sun
- kim3648
- · Replies 4 ·
How Does Changing Current and Coil Loops Affect Electromagnet Lifting Force?
- crosbykins
- · Replies 14 ·
Equivalent Capacitance with Kirchhoff's Laws
- kassu
- · Replies 2 ·
Electrical Voltage, a appliance problem
- helpphysics
- · Replies 3 ·
Deriving orbital period from gravitational force and centripetal acceleration
- therest
- · Replies 1 ·
What is the relationship between Wavelength(λ) and Amplitude?
- bob-e
- · Replies 3 ·
How Does Lenz's Law Determine Induced Current Direction?
- hurtfree1
- · Replies 1 ·
Step-up transformer: find turns ratio and primary current
- crosbykins
- · Replies 5 ·
How Long Would It Take for Earth to Reach 100°C?
- intenzxboi
- · Replies 3 ·
Are these two masses considered equal up to the third digit?
- Niles
- · Replies 7 ·
Capacitors with dielectric question
- Daniiel
- · Replies 3 ·
Why subtract cylinder volume when calculating balloons from Boyle's Law
- MisterMan
- · Replies 7 ·
How Much Heat Must Be Removed to Make Ice from Water at Different Temperatures?
- Yanbeast
- · Replies 1 ·
True or false questions on waves, light and optics
- jos93344
- · Replies 2 ·
Tension of two strings/picture frame
- P944
- · Replies 1 ·
Force of object pulled up incline
- P944
- · Replies 1 ·
What Is the Minimum Speed for a Stone to Stay Taut in a Vertical Circle?
- quantumlolz
- · Replies 2 ·
How High Must a Satellite Orbit to Maintain Specific Gravitational Strength?
- the_morbidus
- · Replies 1 ·
Gravitational and Inertial Masss
- nla
- · Replies 4 ·
Work done dissipated as heat (object moving up a plane)
- mohdakram
- · Replies 6 ·
Solve Entropy Problems: Find Energy Change & Entropy Change
- salient
- · Replies 2 ·
Does buoyancy stay constant when pressure doubles at depth?
- 6MDM
- · Replies 1 ·
Does pressure double the density of both a balloon and water equally?
- 6MDM
- · Replies 1 ·
Is a Group of Order 15 Always Abelian?
- Jupiter
- · Replies 2 ·
What is the Relative Velocity of Wind for a Cyclist Traveling at 20 km/h?
- thereddevils
- · Replies 1 ·
Determine whether or not oxygen can exist on the planet
- thereddevils
- · Replies 1 ·
How Do You Calculate Resistance in a Series Circuit?
- lazyboy92
- · Replies 3 ·
How Do You Derive the Velocity Equation for the Pitt Fall Ride at Kennywood?
- member 217843
- · Replies 1 ·
Why is the current 2 mA from bottom to top in the KCL circuit question?
- kliker
- · Replies 1 ·
Electron shot between two charged plates, does it hit?
- mhen333
- · Replies 2 ·
What is the Flux through a Square Loop with a Current-Carrying Wire?
- WhoWeAre
- · Replies 13 ·
Mixing two liquids with equal mass, find pressure
- look416
- · Replies 2 ·
Work, Energy and Power question
- gaobo9109
- · Replies 1 ·
Water pressure in a tank problem
- ar202
- · Replies 8 ·
How Far Are Car A and Bicycle B from Point O at Closest Approach?
- thereddevils
- · Replies 12 ·
Pressure incr/decr with diameter
- MCATPhys
- · Replies 1 ·
Relativistic Collision of an Electron and a Photon
- bon
- · Replies 2 ·
Is Uniform Circular Motion Considered Equilibrium?
- m.medhat
- · Replies 5 ·
Maximum speed of a mass on a spring
- the_morbidus
- · Replies 2 ·
Electron-Positron Collision finding Kinetic Energy
- phamula
- · Replies 4 ·
Pushing a box up a ramp a certain distance - work
- mybrohshi5
- · Replies 4 ·
A multichoice question on intensity
- Charismaztex
- · Replies 6 ·
A question on Newton's laws and tension
- Charismaztex
- · Replies 1 ·