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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Quantum Tunnelling: Where Does Energy Go?
- mrcotton
- · Replies 3 ·
Moment of inertia and work problem
- coolbyte
- · Replies 4 ·
Heating gas at constant volume/pressure
- CAF123
- · Replies 1 ·
Wavefunction boundary condition solve for k
- zhillyz
- · Replies 3 ·
A thin vertical rod sliding until it hits a lump of putty and rotates.
- volleygirl292
- · Replies 14 ·
What is the angular displacement of a thrown ball
- ashezb
- · Replies 4 ·
Simultaneous events in different frames of reference
- Kyrios
- · Replies 6 ·
Conceptual Questions Lenz's Law, Solenoid
- devilaudy
- · Replies 3 ·
Condensed Matter: Thermal Expansion coeff. using diffraction angles
- themongrelcat
- · Replies 1 ·
Meaning of gradient and intercept
- kingstar
- · Replies 1 ·
Center of mass of a slender rod with variable density
- jonjacson
- · Replies 2 ·
What Is the Average Kinetic Energy of a Nitrogen Molecule at 25°C?
- M9501
- · Replies 2 ·
Height difference in liquids with different densities.
- zeralda21
- · Replies 1 ·
Questions Considering General Circuits
- SDPY15
- · Replies 7 ·
Understanding AC Power: Maximum and Minimum Currents on Resistor and Inductance
- 0fibonacci1
- · Replies 2 ·
Conducting sphere connected to the ground
- Saitama
- · Replies 5 ·
What is the Efficiency of a Cyclic Process?
- Saitama
- · Replies 6 ·
Photoelectric effect, mercury vapor lamp
- korky0429
- · Replies 1 ·
How Do Sound Waves Interfere in Dual Speaker Setups?
- chinnie15
- · Replies 3 ·
Kinetic energy efficiency question
- 13physicsdude
- · Replies 4 ·
Calculating Power and Horsepower for an Aerodynamic Car at 25m/s
- questionasker1
- · Replies 7 ·
Calculating Mass Flow Rate of Nitrogen at 0.3m^3/s
- chartlieb01
- · Replies 1 ·
Constant acceleration in a straight line with variable distances
- yonewt
- · Replies 7 ·
Calculating Average Force on Walls from Bouncing Ball Collisions
- Saitama
- · Replies 9 ·
The electric field formed by a uniformly polarized cylinder
- SadStudent
- · Replies 3 ·
Recommended reading list for secondary school student
- TKZoroSantoryu
- · Replies 1 ·
Electric field due to a hollow, charged cylinder
- chipotleaway
- · Replies 6 ·
How Much Energy Does It Take to Move a Charge to the Apex of a Charged Cone?
- utkarshakash
- · Replies 10 ·
Force on Dielectric Medium in the Presence of Point Charges
- Saitama
- · Replies 10 ·
To which natural frequency does wavelength equal to L1
- jorgegalvan93
- · Replies 1 ·
What Happens to Angular Velocity When a Disc is Dropped onto a Rotating Hoop?
- boognish
- · Replies 4 ·
Calculating Length Change of Heated Copper Rod
- Dantheman1
- · Replies 3 ·
Average speed when covering 99 km at different velocities
- mpoole
- · Replies 2 ·
E-field from Time Varying B-field of Current wire
- kalashbhatt
- · Replies 1 ·
Momentum Question: Asteroid Collision
- student34
- · Replies 2 ·
Net force of two forces in a ring
- ShizukaSm
- · Replies 2 ·
Experiment Suggestions For Friction and Momentum
- physicsguru97
- · Replies 1 ·
Calculating Net Electric Flux in a Cylindrical Solid of Charge - Homework Help
- asdf12312
- · Replies 1 ·
Car pulled with friction: finding acceleration using energy and D'Alembert
- cheese_whizz
- · Replies 6 ·
Force crate 2 exerts on crate 3 when three crates are pushed
- bp789
- · Replies 1 ·
Minimum thickness n/wavelength equation?
- asdf12312
- · Replies 1 ·
How can I represent a double pendulum system using matrices?
- CAF123
- · Replies 9 ·
What could cause data to linearize at a higher power than it should?
- djh101
- · Replies 5 ·
Calculating Strain Energy in a Hanging Spring
- Nemo's
- · Replies 9 ·
Car engine efficiency with 12% conversion rate
- 13physicsdude
- · Replies 2 ·
What is the weight of a 1500 kg car on Planet X?
- cmNickoli7
- · Replies 2 ·
Parallel Springs subject to load
- pige
- · Replies 4 ·
Rain speed and direction from relative motion with two observer speeds
- aaronstonedd
- · Replies 2 ·
Torque and Moment of Inertia of a soda can
- hannah668
- · Replies 2 ·
Universal gas constant for 1 kg oxygen
- Ezio3.1415
- · Replies 3 ·
Find the Force to move 2 objects, and force between the 2
- lemonade
- · Replies 5 ·
Calculating Capacitor Oscillations on a Conductive Spring
- skrat
- · Replies 16 ·
Problem involving Newton's second law
- Clever_name
- · Replies 4 ·
Angular momentum as a function of time question
- goli12
- · Replies 1 ·
Question related to motion / kinematics
- hasnainzeenwa
- · Replies 3 ·
What is the Electric Potential at a Point on the Surface of a Charged Sphere?
- utkarshakash
- · Replies 5 ·
Does Static Equilibrium Necessitate Zero Velocity?
- whitehorsey
- · Replies 1 ·
Time for one relativistic rocket to pass another
- ZanyCat
- · Replies 3 ·
Is the Charge Positive or Negative in This Electric Field Scenario?
- Nerkiot
- · Replies 1 ·
Proportions in circular motion don't make sense.
- Scorpius
- · Replies 2 ·
Integral of non-constant acceleration
- Karol
- · Replies 5 ·
Finding acceleration of cylinder
- Saitama
- · Replies 34 ·
Where does Gravitation equals zero?
- Sapphiretwirl
- · Replies 10 ·
Charge entering and leaving a light bulb
- iriver4
- · Replies 7 ·
Two point sources interference: nodal lines and angles with 20 cm spacing
- redbluegreen
- · Replies 1 ·
Work equation for electrostatics and electricity
- Benny851
- · Replies 1 ·
How Do You Calculate Torsion Spring Parameters?
- freshcoast
- · Replies 3 ·
IIT-JEE 1991 optics problem with spherical and plane dioptres
- jaumzaum
- · Replies 6 ·
Mass-spring system in SHM concept question
- freshcoast
- · Replies 4 ·
Finding a, b, c given V=abc=512cm³ and a=2b, b=2c
- besfort
- · Replies 4 ·
Help with Moment Calculation Problem
- bostonfenway
- · Replies 1 ·
Finding support force components and distance using equilibrium
- physicsman1234
- · Replies 1 ·
How to calculate a harmonic of a square wave
- bigfattyfatfat
- · Replies 3 ·
What is the PSI needed to lift me at an acceleration of 1m/s/s?
- daviddjh
- · Replies 2 ·
Average acceleration from average velocity?
- Fizz_Geek
- · Replies 1 ·
Finding separation of bright spots
- omc1
- · Replies 4 ·
Calculating Escape Velocity of Mars from the Sun's gravitational field
- QuickSkope
- · Replies 12 ·
Answer: Torque of Swallow on 40 N Rod with 1 m Length
- Nirupt
- · Replies 1 ·
Torque with sign attached to a rod
- Painguy
- · Replies 2 ·
What is Not Directly Proportional to Current Density in the Drude Model?
- timothyhenry
- · Replies 1 ·
The Bouncing Ball: Understanding Energy Conservation
- EricPowell
- · Replies 4 ·
Finding Frictional force from the magnetic equation Fb=BIL
- aldoftybg
- · Replies 1 ·
Transistor load and saturation problem
- septentriones
- · Replies 1 ·
Index of Refraction Concept - Extremely Confusing
- riseofphoenix
- · Replies 2 ·
Charge surrounded by charged conducting sphere
- iriver4
- · Replies 8 ·
How Does Friction Affect Energy Conservation in Rotational Motion Experiments?
- Painguy
- · Replies 3 ·
Maximum acceleration of a front-wheel drive car
- Kaevan807
- · Replies 2 ·
Strain potential energy and efficiency question
- Dongorgon
- · Replies 1 ·
Circuit Analysis - Laplace notation
- anol1258
- · Replies 17 ·
Why do equal refractive indices mean no bending between two materials?
- riseofphoenix
- · Replies 8 ·
How to solve circuit analysis problems with multiple loops?
- Questions999
- · Replies 21 ·
Finding impedance that is unit step function
- anol1258
- · Replies 6 ·
Calculating induced charges by a charge between two capacitor plates.
- anirudhsharma1
- · Replies 21 ·
Calculate force acting on a Rod with constant mass and varying length
- rashboosh
- · Replies 7 ·
Simple Capacitor System Question
- NoranPrease
- · Replies 3 ·
Calculate the amount of heat added to the ideal monatomic gas
- Tab Caps
- · Replies 2 ·
Planar kinematics of rigid bodies
- tamtam402
- · Replies 8 ·
Rolling, Both Slipping and Nonslipping
- cbasst
- · Replies 6 ·
How Do You Prove Constructive Interference Mathematically?
- hyddro
- · Replies 21 ·
Where is the friction for the following situations?
- jeevankasin
- · Replies 1 ·