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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A point source isotropically emitting 10^8 fast nuetrons
- bel10
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What is the EMF generated in a Straight Conductor?
- kpsr
- · Replies 11 ·
Charge induction on a conducting cup with lowered sphere
- RoboNerd
- · Replies 10 ·
Question on magnetic fields from wire
- RoboNerd
- · Replies 4 ·
Calculate the net force acting on the object in the diagram
- roguekiller93
- · Replies 1 ·
Rotational Inertia of a skateboarding wheels?
- skoande
- · Replies 4 ·
Proving work equation dW=-vdP for open systems
- benny_91
- · Replies 7 ·
De Broglie wavelength and energy levels
- rohanlol7
- · Replies 3 ·
Special Relativity: Super-Novae light on earth
- Destroxia
- · Replies 2 ·
When does a bead lose contact with a string over a pulley?
- decentfellow
- · Replies 12 ·
Electric Field of Plate to a Point
- miniissacnewton
- · Replies 7 ·
Time-dependent vector moving uniformly between two points
- Mr Davis 97
- · Replies 19 ·
Acceleration from velocity and distance when object changes direction
- Teleknight
- · Replies 9 ·
Dynamics -- Newton's 2nd law with acceleration
- Nanu Nana
- · Replies 10 ·
Calculating Pressure Inside a Water Mist Droplet
- Derek1997
- · Replies 3 ·
Electric Charge and Force free body diagrams
- Cglez1280
- · Replies 1 ·
Rotational Motion - Conservation angular momentum
- HoodedFreak
- · Replies 9 ·
What is the Orbit of Hydrogen Atom for an Electron at 734 km/s?
- gruba
- · Replies 3 ·
Where can I find Similar Kinematics Questions?
- Zakariyya
- · Replies 2 ·
Semi-circle linear charge Electric Field
- RJLiberator
- · Replies 5 ·
Find distance from ramp at which skier lands
- MickeyBlue
- · Replies 7 ·
Why Is the Normal Force the Same on Both Blocks in a Frictional System?
- OrlandoLewis
- · Replies 8 ·
Simple Harmonic Motion with Rotational Inertia
- Vanessa Le
- · Replies 6 ·
Mass of Object Pulled by 40 HP Engine: 1,350 Kg
- Pao44445
- · Replies 1 ·
How does a rod rotate due to gravity?
- HoodedFreak
- · Replies 6 ·
Physics Archimedes Principle Distance an object sinks
- nwmyname
- · Replies 6 ·
Draw a free body diagram for the electric force
- Cglez1280
- · Replies 15 ·
Finding eigenvalues and state evolution of a two-level quantum system
- B3NR4Y
- · Replies 7 ·
Condition to not let the block descend
- decentfellow
- · Replies 13 ·
Trying to understand vector conversion matrices
- FrankJ777
- · Replies 5 ·
Calculate temperature of a conductor
- Themadflower
- · Replies 16 ·
Rotational Motion - 2 Disc System
- HoodedFreak
- · Replies 2 ·
Pressure on an open piston (derivation)
- rohanlol7
- · Replies 23 ·
Coulombs law and particle charges
- ajd
- · Replies 2 ·
What is the Force Between Two Protons 1.0m Apart?
- ajd
- · Replies 2 ·
Calculating Horsepower Needed to Lift 150 kg for 20 m in 10 min
- Pao44445
- · Replies 2 ·
Calculating Acceleration of M1,M2 System w/ Friction
- Cglez1280
- · Replies 10 ·
How Is the Total Maximal Elastic Energy Calculated in This System?
- Edothegray
- · Replies 4 ·
Find acceleration and speed of a box
- moenste
- · Replies 5 ·
How much work is done on a bucket when pulling it up?
- BlueQuark
- · Replies 3 ·
Find the distance between the q charges
- itzernie
- · Replies 2 ·
Simple Significant Figure Problem
- BillhB
- · Replies 9 ·
Half power frequency divides by sqrt(2) instead of 2 why?
- fahraynk
- · Replies 13 ·
Is a motionless liquid-floating object possible?
- Alfreds9
- · Replies 9 ·
How do I know when velocity is negative in a 1-D motion problem?
- Pallta
- · Replies 2 ·
Portion problem including Vrms
- brycenrg
- · Replies 3 ·
How Does Pinhole Diameter Affect Image Sharpness in Rayleigh Criterion?
- bananabandana
- · Replies 1 ·
Question on problem solving approach involving work done
- RoboNerd
- · Replies 2 ·
Archived Telescope geometric optics problem
- ryan11
- · Replies 6 ·
Why are internal axial forces 60 kN and 40 kN in a clamped steel bar?
- Wolfrider
- · Replies 1 ·
The power measured by a hydrophone in Watts or Watts/cm^2
- rwooduk
- · Replies 2 ·
Why Is There Little Helium in Earth's Atmosphere?
- Derek1997
- · Replies 5 ·
A Charged Particle moving in Uniform Magnetic Field
- Milind Chakraborty
- · Replies 2 ·
How to find Otto engine clearance from efficiency and specific heat ratio
- PauloBuzon
- · Replies 1 ·
Finding node voltages with KVL and KCL in a resistor network
- nothingsus
- · Replies 1 ·
Motion of two objects connected by a string over a pulley
- Sanchayan Dutta
- · Replies 5 ·
Finding spring constant k by linearizing mgh = 1/2kx²
- student23561235
- · Replies 3 ·
Spaceship voyage at close to light speeds
- Elvis 123456789
- · Replies 11 ·
If the object floats, the buoyant force will be equal to its
- lucynemes86
- · Replies 21 ·
Solving a Physics Problem: Find Velocity of Block at Bottom of Loop
- Cglez1280
- · Replies 1 ·
Finding focal point of concave lens using concave and convex
- TheCapacitor
- · Replies 10 ·
Why image is blurry or focused with convex lenses?
- TheCapacitor
- · Replies 7 ·
How Do Charges Distribute Between Concentric Spheres When Connected by a Wire?
- GwtBc
- · Replies 3 ·
Find BTU Required for Water Cooling ?
- Assim
- · Replies 2 ·
Finding change in pressure when mercury level drops
- confusedperson
- · Replies 9 ·
Force required to lift a platform (over the range of angles)
- AlexKud
- · Replies 13 ·
Equivalent Bending Moment due to Impact Formula?
- Jamie Gough
- · Replies 2 ·
Time of collision of two lead spheres
- CAF123
- · Replies 11 ·
Hair/wire laser diffraction interference pattern
- esdoublelef
- · Replies 5 ·
Derive an expression for the x- component of velocity.
- JohnTravolski
- · Replies 19 ·
Calculating the velocity given the position of the particle
- TheLil'Turkey
- · Replies 1 ·
Position,velocity,acceleration time grapgh
- Elitisi Piuela
- · Replies 1 ·
Archimede's Principle to Make a Cup Float to Certain Height
- Terrified Virus
- · Replies 10 ·
Expressing measurements in SI units
- RabbitWho
- · Replies 10 ·
Momentum, collision of two cars problem
- Erenjaeger
- · Replies 5 ·
RC circuit, finding voltage across a capacitor
- timnswede
- · Replies 11 ·
Calculating Net Flux of Glucose Molecules Across a Distance of 1um
- Derek1997
- · Replies 1 ·
How Do You Calculate Skier's Mass and Acceleration with Newton's Second Law?
- Nanu Nana
- · Replies 2 ·
Electric Field in a cavity of a charged sphere
- dumbdumNotSmart
- · Replies 11 ·
Stationary Target X-Ray Tubes - Energy
- ChrisJ
- · Replies 1 ·
Feynman's (err, Gottlieb's) infinite pulley problem
- John1951
- · Replies 6 ·
Archived Power factor at half power points for RLC circuit
- Loki
- · Replies 5 ·
Significance of basic substances on electrical conductivity
- PauloBuzon
- · Replies 2 ·
Finding static friction of a block on a table on a pulley?
- Eclair_de_XII
- · Replies 4 ·
How can an astronaut lower the perigee of a circular orbit?
- Vibhor
- · Replies 8 ·
Can small condensation drops produce an enlarged image?
- andrevdh
- · Replies 5 ·
Constant force acting on a particle
- Vibhor
- · Replies 4 ·
Effeciency and Current Relationship
- TKrantz
- · Replies 7 ·
What is the potential difference between two concentric charged spheres?
- i_hate_math
- · Replies 1 ·
Not getting right answer in force problem
- sharpnova
- · Replies 17 ·
1 dimensional problem, from Yale online physics course.
- ElectricRay
- · Replies 4 ·
Projectile Motion- Incline vs. Horizontal Surface
- phzzo
- · Replies 12 ·
Archived Rotational Motion -- a hollow ball rolls down a ramp
- Homerr
- · Replies 6 ·
What Are the Accelerations and Tensions in a Double Atwood's Machine System?
- Bray__
- · Replies 8 ·
Speed of block as cylinder reaches bottom of circular track.
- takando12
- · Replies 11 ·
A problem about friction with three blocks stacked together
- Prem1998
- · Replies 5 ·
Proof -- motion under a central force in text Symon Mechanics
- kylinsky
- · Replies 2 ·
Is voltage drop different in parallel circuits?
- TonyG247
- · Replies 5 ·
How do I calculate the extension and strain at peak load?
- ipocoyo
- · Replies 1 ·
Three stacked blocks with friction, force applied to each
- Prem1998
- · Replies 1 ·