Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Why do electronic devices need constant DC voltage instead of AC?
- Dongorgon
- · Replies 3 ·
Charge outside and inside a hollow ball
- Nikitin
- · Replies 13 ·
Thermal physics final temperature of mixture
- AbsoluteZer0
- · Replies 6 ·
Concentration and diffusion of oxygen in the Earth's atmosphere
- Yuriick
- · Replies 1 ·
Simple harmonic motion on an incline
- PhizKid
- · Replies 1 ·
What is the principle of moments?
- JoHickie
- · Replies 1 ·
Horizontal spring with friction
- Ali 2
- · Replies 5 ·
Longest sound wave in a 4m room and its frequency
- cytochrome
- · Replies 7 ·
Potential of Infinite Sheets of Charge and Conducting Slab
- Gee Wiz
- · Replies 17 ·
Calculate the flux through a cube of size 1.0 m
- junglebobo
- · Replies 3 ·
Calculating Angular and Linear Speed and period of revolution
- FaraDazed
- · Replies 6 ·
How Do You Calculate Projectile Velocity at Different Times?
- mgerman63016
- · Replies 16 ·
Clay falling onto a pan attached to a vertical spring
- ultimateman
- · Replies 4 ·
Calculating Charges of Identical Tiny Conducting Spheres
- fresheze13
- · Replies 1 ·
Flux through far away disc and potential Q.
- CAF123
- · Replies 15 ·
Why does integrating charge density over the region give zero when the field is nonzero?
- fishingspree2
- · Replies 1 ·
Need a Double Check / Verification
- Inferior Mind
- · Replies 2 ·
Struggling with finding the mass req'd when velocity is doubled
- Harrison01
- · Replies 8 ·
Understanding Free Body Diagrams for Cantilevered Structures
- pyroknife
- · Replies 17 ·
Find equivalent resistance in this circuit
- Hyperfluxe
- · Replies 4 ·
Work, Net work, Work done by friction
- dcasplen
- · Replies 18 ·
Cart on frictionless track pulled by hanging weight
- Habibrobert
- · Replies 4 ·
Infinite number of turns in finite time
- paras02
- · Replies 8 ·
When does car 2 catch up to car 1 on a velocity-time graph?
- Nirupt
- · Replies 17 ·
Projectile fired horizontally from 55 m height
- _physics_noob_
- · Replies 7 ·
Beta decay of deuterium and triterium
- pbonnie
- · Replies 4 ·
Finding the angle between two magnitudes.
- Daweih
- · Replies 3 ·
Electric Field Between Two Infinite Sheets of Charge
- BRuss9807
- · Replies 2 ·
String tension between two masses on inclined planes
- Inferior Mind
- · Replies 3 ·
The number of kg needed to pull apart Magdeburg Hemispheres
- ShelbyMcD
- · Replies 12 ·
Find magnitude of acceleration on a Ca ion, given electric field.
- monnapomona
- · Replies 8 ·
Finding the final velocity of a proton
- becky_marie11
- · Replies 3 ·
Difficult optimal cable cost analysis
- algar32
- · Replies 69 ·
Why does my professor's node voltage have opposite sign from the textbook?
- cpatel23
- · Replies 1 ·
Chemical potential in Thermodynamics to find latent heat of vaporization
- musicure
- · Replies 7 ·
Find how far the spring will be stretched
- ShelbyMcD
- · Replies 2 ·
Centripetal acceleration of a vehicle on banked circular arc
- Zatman
- · Replies 2 ·
Calculating Energy Needed for Change of Phase: Do I Need One More 'mCΔT'?
- AbsoluteZer0
- · Replies 2 ·
Determing unknown weight of an hanging object in a systen
- GoGoGadget
- · Replies 3 ·
Each Car has Speed Corresponding to Max Normal Acceleration. Find Time Elasped
- Northbysouth
- · Replies 1 ·
Electric Field Problem-Balancing Forces
- tyreal
- · Replies 6 ·
Thermodynamic Properties; Isentropic Expansion
- FlyingSpartan
- · Replies 2 ·
Isothermal exapansion, work done
- Saxby
- · Replies 3 ·
Calculating Capacitor Charge and Energy: A Quick Guide
- CharlieBewn
- · Replies 2 ·
What Speed Does a Spacecraft Need to Escape the Solar System from Earth's Orbit?
- Bashyboy
- · Replies 30 ·
What is the horizontal distance between a tilted conveyer belt and a pipe?
- burton95
- · Replies 7 ·
Truck in circular motion at 70 m/s: high centripetal acceleration and force
- FaraDazed
- · Replies 3 ·
Calculating Friction Force on a Rotating Disk
- 5Mystery
- · Replies 1 ·
Equivalent Capacitance of Complex Circuit
- megaspazz
- · Replies 5 ·
Designing an Effective Egg Catcher: Materials and Strategies
- Zanmar
- · Replies 2 ·
Electric potential of tiny spheres question
- lodovico
- · Replies 1 ·
Voltage output for ideal diode (solutions wrong?)
- pyroknife
- · Replies 5 ·
Vertical hydrostatic force acting upwards on a curved surface?
- theBEAST
- · Replies 1 ·
Finding Velocity and Acceleration for a Moving Particle
- tcc88
- · Replies 2 ·
How is the electric field formula for a charged rod derived?
- Bashyboy
- · Replies 11 ·
Force exerted by a 1 kg nut on a 45° screw thread
- IsaacFigNewton
- · Replies 27 ·
How Does Tension Vary in a Multi-Block Pulley System?
- wcase
- · Replies 4 ·
Understanding Electric Flux and Field Lines in a Uniform Electric Field
- aaronfue
- · Replies 1 ·
Compute Ratio for Luminosity to Mass: Compare to Sun
- oldspice1212
- · Replies 2 ·
Finding potential between identical spheres
- flip290
- · Replies 13 ·
Resultant Vectors and Equilibriant Vectors
- ME_student
- · Replies 5 ·
Do sound waves get bigger when they bounce off a wall?
- JazzyJones
- · Replies 5 ·
Thermal Stress Problem- not sure how to attack this one
- RoKr93
- · Replies 1 ·
Are my answers about waves and light correct?
- chipM
- · Replies 12 ·
Determining the possible time interval between two sine waves
- randoreds
- · Replies 6 ·
Why acceleration is not 9.8m/s^2?
- cmkc109
- · Replies 1 ·
Finding loss of sun's mass given the energy density delivered.
- texan14
- · Replies 1 ·
Carnot Engine ~ Electric Generating station
- Coti1002
- · Replies 4 ·
Write Vector Expression in n-t and x-y coordinates of Acceleration
- Northbysouth
- · Replies 3 ·
Quantam Mechanic - Particle in a rigid one-d box (PDF)
- MPKU
- · Replies 1 ·
How do you derive the correct projectile motion formula?
- gmy5011
- · Replies 3 ·
Why does air pressure decrease with altitude?
- salma17
- · Replies 2 ·
Determine the Velocity and Magnitude of Acceleration on the Wheel
- Northbysouth
- · Replies 4 ·
Change in thermal energy and Temperature problem
- laser123
- · Replies 1 ·
Volume of Silo bin with Cone top
- zeshkani1985
- · Replies 1 ·
Finding The Effect of Several Electrics Fields
- Bashyboy
- · Replies 9 ·
Why is momentum conserved in collisions but not for a rolling ball with friction?
- ShizukaSm
- · Replies 6 ·
Where Do Electric Fields Cancel Out Between Two Charged Particles?
- Bashyboy
- · Replies 3 ·
Finding when two particles fired at different times reach the same height
- Taylor_1989
- · Replies 1 ·
Equation for displacement in damped harmonic motion.
- Craptola
- · Replies 1 ·
Projectile Motion Angle Problem
- TRobison
- · Replies 2 ·
How are magnets able to attract each other?
- sgstudent
- · Replies 4 ·
Comparison of T, E and V in different states?
- theBEAST
- · Replies 3 ·
Velocity of satellite at specific altitude
- Biosyn
- · Replies 22 ·
Electric field - Finding the charges
- rm_girl
- · Replies 1 ·
Max velocity for simple pendulum oscillation
- PhizKid
- · Replies 5 ·
What types of energies can be generated from fire
- costa_1205
- · Replies 1 ·
Do electrons in a neutral metal rod experience net force from a charged rod?
- sgstudent
- · Replies 18 ·
Electric potential problem with two plates and different points (i'll elaborate)
- nadeem0322
- · Replies 1 ·
Rocket travels into space, emits sound - intensity/time question
- fuzzy361
- · Replies 2 ·
Downward acceleration in an elevator
- racecar12
- · Replies 9 ·
Distance and speed word problem. Introduction to vectors.
- Nirupt
- · Replies 9 ·
Equation for speed of charges (electrostatics)?
- devil0150
- · Replies 3 ·
Δt=6.7 s, Δx= .25 miles what is speed?
- burton95
- · Replies 6 ·
How Do Charges Affect Electrostatic Force?
- Bashyboy
- · Replies 5 ·
Space Dependence of Electric potential
- PhysicsRob
- · Replies 7 ·
Difference between fluorescent strip and compact fluorescent lamp
- moimoi24
- · Replies 11 ·
Calculating Thermal Expansion in a Steel Cable
- has1993
- · Replies 5 ·
Rearrange 0.05=(2.88/4*1*0.018)(0.05^2-r^2) for r^2
- rad10k
- · Replies 11 ·
Using Projectile motion to find the distance above a wall
- PensNAS
- · Replies 4 ·