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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Find current using KVL (with dependent source)
- iharuyuki
- · Replies 2 ·
How can I determine the properties of a thin lens using basic formulas?
- AaronBurr
- · Replies 3 ·
Two particles colliding: v1=3t-5, v2=-t+30, 100m apart
- simile
- · Replies 7 ·
Modeling mass-spring-dashpot system
- Kavorka
- · Replies 3 ·
Sign on change in electric potential energy
- henry3369
- · Replies 8 ·
Force from 300 lb mass dropped 10 feet vs resting mass
- BTT
- · Replies 7 ·
Amplitude of two carts attached by a spring
- frogs
- · Replies 1 ·
Conservation of Momentum in Explosions
- anton717
- · Replies 1 ·
Electric field within a conductor with a cavity
- henry3369
- · Replies 4 ·
Pendulum motion inside a freely falling lift
- philk
- · Replies 7 ·
Magnetic Field due to long wire?
- Destroxia
- · Replies 5 ·
How Was the Equation v=fλ Derived in Wave Physics?
- Musa Ali
- · Replies 1 ·
Conservation of heat on a closed system
- Ethan_Tab
- · Replies 8 ·
Adiabatical Compression Question
- Reptic
- · Replies 4 ·
How do I get acceleration, distance, and time?
- NkaujHelp
- · Replies 3 ·
Force and field from two point charges separated 2.4cm
- jn.4846
- · Replies 1 ·
How to apply Kirchhoff's voltage law with arbitrary current directions
- sciman
- · Replies 3 ·
How to sketch voltage phasors for cos and sin forms
- sciman
- · Replies 11 ·
Weight of 1 kg mass on planet with Earth's mass but half its radius
- NkaujHelp
- · Replies 1 ·
DQ/dt=kA(dT/dx) = Heat Transfer. What is Q(t) Solution ?
- Point Conception
- · Replies 15 ·
Induced current from changing magnetic field
- iharuyuki
- · Replies 2 ·
Thevenin technique solving problem -- getting wrong answer
- sciman
- · Replies 2 ·
Ladder on rough ground against rough wall
- Yoonique
- · Replies 6 ·
Case when there is no normal force in spite of contact
- gracy
- · Replies 28 ·
What'a difference between TEM wave and plane wave?
- baby_1
- · Replies 3 ·
(simple?) question on number of molecules in an area
- rwooduk
- · Replies 2 ·
How much does the raft move with change of position?
- ninesixfive
- · Replies 4 ·
Calculate resistance from resitivity
- iharuyuki
- · Replies 2 ·
How to interpret the given informations in physics problems
- gracy
- · Replies 16 ·
Direction of induced EMF in loop
- iharuyuki
- · Replies 2 ·
How many balloons can be filled from the cylinder
- cricket0140
- · Replies 6 ·
How to convert power to energy in a heat pump problem?
- Tangeton
- · Replies 4 ·
Rotating Disk and two students?
- MaximumPhysics
- · Replies 11 ·
Ball roll down from the top of a rough spherical dome
- Yoonique
- · Replies 24 ·
Harry Potter's Physics on a Rotating Turntable
- a.303
- · Replies 3 ·
Definition of gravitational potential
- Rohan1997
- · Replies 10 ·
How Coulomb's Law relates to generators? (voltage)
- Celina
- · Replies 1 ·
How Do You Apply Coulomb's Law to Calculate Forces in a 3D Coordinate System?
- CaptainOfSmug
- · Replies 1 ·
Two masses on two inclined planes -- What is magnitude of velocity
- spacetimedude
- · Replies 4 ·
Magnetic Field Strength in a Solenoid at t = 1 ms
- vysero
- · Replies 2 ·
Two Weighted Pulleys with a Suspended Mass
- steakums
- · Replies 3 ·
Two charges and electric field?
- Ginepri
- · Replies 1 ·
What are the forces acting on a sliding box?
- SelenaT
- · Replies 2 ·
Conceptual Questions Regarding the Dynamics of Heat Transfer
- zak.hja
- · Replies 9 ·
Tangential, Radial and total acceleration
- Robert0606
- · Replies 1 ·
Launch angle to maximize range on a 30° frictionless wedge
- AlephNumbers
- · Replies 3 ·
Calculating Torque of Parallel Forces on Rod
- nishanth R
- · Replies 1 ·
Why Is Static Friction Acting on Block B?
- gracy
- · Replies 17 ·
With what acceleration 2m will move?
- kaspis245
- · Replies 3 ·
Lost Kinetic Energy in Inelastic Collision of Putty and Pivoting Rod
- kingsmaug
- · Replies 3 ·
SHM displacement calculation with phase difference
- PhysicStud01
- · Replies 25 ·
How Does the Velocity of a Falling Disc's Centre Change with Height h?
- mooncrater
- · Replies 13 ·
Find distance fallen given time of fall
- Spenceriscool
- · Replies 3 ·
Two oppositely charged wires and their capacitance
- mooncrater
- · Replies 4 ·
Why Are There Different Formulas for Wave Velocity?
- mooncrater
- · Replies 2 ·
Difference between dimensional and dimensionless physical constants
- nishanth R
- · Replies 5 ·
Kinetic energy of Earth and ball system
- lkijmj
- · Replies 3 ·
Find the equilibrium position of the winch
- datanhlg
- · Replies 1 ·
Find the weight of a sphere connected to a pulley and to wall
- MaiteB
- · Replies 18 ·
Electric field of a non-conducting shell
- motyapa
- · Replies 1 ·
Newtons Third Law Involving three objects
- ImranyZ
- · Replies 2 ·
Two Blocks Inelastic Collision with Spring
- radiantvibe
- · Replies 6 ·
Best angle to shoot a projectile
- Calpalned
- · Replies 4 ·
How Do Capacitors Behave in a DC Circuit?
- Jamessamuel
- · Replies 2 ·
What Inductance Value Is Needed for a Light Bulb in a 240V AC Circuit?
- NoSniping
- · Replies 11 ·
What is the direction of the red ball's angular momentum
- Westin
- · Replies 27 ·
The applied and friction forces of a particle
- Edd988
- · Replies 10 ·
Speed of Muons, calculate KE and Momentum
- rlc
- · Replies 21 ·
How many bricks can be put without disordering the equilibrium
- MaiteB
- · Replies 32 ·
How High Must a Ball Be Launched to Clear a School Roof?
- DatAshe
- · Replies 8 ·
A ball of mass m is thrown with a velocity v at a disk
- Westin
- · Replies 4 ·
RLC circuit with two parallel branches: impedance and power analysis
- B. Vane
- · Replies 5 ·
Entropy and thermodynamics question
- Steve1019
- · Replies 1 ·
Why do I get 0.31 for density change when atoms move farther apart?
- PhysicStud01
- · Replies 3 ·
What focal length is needed for a 0.60x magnification with a diverging lens?
- Taylor Marks
- · Replies 2 ·
Ball thrown off the top of a hill, ball hits hill
- Jazzman
- · Replies 2 ·
Finding the expression for momentum.
- aracali
- · Replies 3 ·
Relative Motion Analysis: Acceleration of rotating disk
- _N3WTON_
- · Replies 3 ·
Finding Maximum Power Delivered to Resistor
- jinger
- · Replies 1 ·
Finding unknown capacitance in series with 197-pF capacitor
- Angie K.
- · Replies 3 ·
Light and Optics: Shoplifter's Distance and Height
- Taylor Marks
- · Replies 1 ·
Tension in string when block accelerates with the car at 3 m/s²
- Calculus Master
- · Replies 93 ·
Doppler Effect and the speed of sound
- Potatochip911
- · Replies 3 ·
Electron's trajectory in positively charged hollow cylinder
- Mary001
- · Replies 3 ·
Electric field due to 2 charged spheres
- Yoni V
- · Replies 7 ·
Finding equivalent capacitance for C1 and C2 in series with C3 in parallel
- GoldWing
- · Replies 3 ·
Find Width of Slit for Diffraction Maxima
- Seigi Yokota
- · Replies 3 ·
Kenetics torque tension acceleration question
- electro82
- · Replies 15 ·
Understanding Gravitational Fields: Patterns, Potentials, and Velocity
- BoanviaFx
- · Replies 2 ·
Calculating RI of Oil w.r.t Air with Apparent Depth of Liquid
- Suraj M
- · Replies 8 ·
Double Slit Interferance Intensity
- JJK1503
- · Replies 3 ·
Half life and percentage remaining
- nmsurobert
- · Replies 4 ·
Block moving towards movable wedge
- Yoonique
- · Replies 18 ·
Block sliding down frictionless ramp on frictionless floor
- DavideGenoa
- · Replies 5 ·
Solving Question 3: Is the Fulcrum Lifting the Load?
- snav96
- · Replies 4 ·
What happens to forces in biomechanics when an object is starting to tip?
- snav96
- · Replies 3 ·
Tension Rope and Blocks Problem
- DaveTan
- · Replies 4 ·
Redistributed Charge (Capacitors)
- Angie K.
- · Replies 7 ·
Why isn't the force in the direction of the velocity in the equation F=P/v?
- Mr Davis 97
- · Replies 9 ·
Why Can External Road Forces Be Neglected in a Collision Analysis?
- Westin
- · Replies 7 ·