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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BC108 transistor load line doesn't intersect characteristic curves
- nfi
- · Replies 3 ·
Projectile motion with linear drag
- ewelinaaa
- · Replies 1 ·
Fission vs. Fusion question (particle physics)
- Diyon335
- · Replies 4 ·
Net force on an inclined plane with friction
- chezholmes
- · Replies 2 ·
To find the velocity of a mass attached to the midpoint of a spring
- gnits
- · Replies 2 ·
Finding moment of inertia using bifiler suspension with a rectangular rod
- dlxgains
- · Replies 2 ·
Angular momentum of a falling ball
- ac7597
- · Replies 9 ·
Why is mesh current i1 - i2 used instead of i2 - i1?
- rugerts
- · Replies 2 ·
Finding electric field inside a spherical shell with Gauss' law
- Eitan Levy
- · Replies 10 ·
What is the formula for calculating torque in a rotating pyramid?
- ac7597
- · Replies 24 ·
To find the increase in the radius of a rotating ring
- Kaushik
- · Replies 21 ·
Oscillation of a particle inside water caused by a sound wave
- bubble-flow
- · Replies 1 ·
Algebra: How do I derive this equation given two other equations?
- dsilvas
- · Replies 2 ·
How Do Kinematics Apply to a Fielder Catching a Ball?
- Harminder_Saini
- · Replies 5 ·
What are some unique propulsion systems for a pinewood derby car project?
- ofinucan7
- · Replies 3 ·
Understanding Enthalpy and Work in Constant Pressure Processes
- r12214001
- · Replies 4 ·
The Conservation of Angular Momentum in Polar Coordinates
- WaiYan
- · Replies 6 ·
Solving for a with Ma=Eq, ΔV, and m/d
- alanwangcot
- · Replies 2 ·
Moving electron under two magnetic fields
- merdeka
- · Replies 3 ·
How Does Coil Configuration Affect Current in LR Circuits?
- garthenar
- · Replies 14 ·
How can the force of impact be reduced in an egg toss game?
- Thib
- · Replies 17 ·
Rotational torque and kinematics of a rod
- ac7597
- · Replies 5 ·
Black body radiation and the derivation of Stefan Boltzman
- dcarmichael
- · Replies 5 ·
Find the electric field of a cylindrical charge
- zelscore
- · Replies 2 ·
Isenthropic compression 5000L, 5Bar, 2500L, 288K
- dbag123
- · Replies 3 ·
Is it possible to pull a wagon without wheels?
- benca
- · Replies 10 ·
Efficiency of heating up aluminum vs steel by induction
- Karl Karlsson
- · Replies 9 ·
What Does Unit Weight (kN/m^3) Mean?
- tomtomtom1
- · Replies 6 ·
Finding the final velocity of a volleyball
- benca
- · Replies 5 ·
Electron with circular trajectory in a magnetic field
- merdeka
- · Replies 3 ·
Combination lens equation questions
- Mr.somebody
- · Replies 2 ·
Find the forces applied to a rotating level
- melissafern
- · Replies 3 ·
Power related to the EMF of an adjustable coil in a magnetic field
- garthenar
- · Replies 4 ·
Force Calculation: Incorrect Result
- Alexandra Fabiello
- · Replies 2 ·
Operational Amplifier key parameters
- nobodyhere
- · Replies 2 ·
Finding friction coefficient when pulley system is at equilibrium
- minadd
- · Replies 2 ·
Calculating Collision Frequency of Electrons in Copper Cube
- hnnhcmmngs
- · Replies 2 ·
What is the correct moment of inertia for a spinning disk?
- ac7597
- · Replies 25 ·
How to calculate the horizontal shift?
- centinela20
- · Replies 3 ·
Horizontally Launched projectile landing on curved ground
- bluemyner
- · Replies 11 ·
Sound dampened through an object
- dbag123
- · Replies 23 ·
Below 20K, The specific heat capacity c of silver varies with temperature
- Rifat amin
- · Replies 5 ·
Sound power: What is 100mW amplified by 2dB?
- dbag123
- · Replies 10 ·
Why is tension (T) only added to one side of an Atwood Machine?
- PhysicsCanuck
- · Replies 3 ·
What is the direction of the torque in this scenario?
- ac7597
- · Replies 5 ·
Elastic collisions between three particles with masses m, 2m, and 3m
- radhxy
- · Replies 4 ·
Can a tension constraint lead to the wrong results?
- Physics freak
- · Replies 17 ·
Forces applied by a slot on a slider
- Like Tony Stark
- · Replies 15 ·
Finding distance and final velocity for a projectile launched at 10 m/s and 23 degrees
- bluemyner
- · Replies 6 ·
Solving for a neutralizing B0 in a Thomson Cathode Ray (Algebra?)
- garthenar
- · Replies 2 ·
Power supplied by a Capacitor and Inductor
- engnrshyckh
- · Replies 6 ·
Why is the condition E << m valid for Carbon 12 ions in nonrelativistic physics?
- dsilvas
- · Replies 9 ·
2 inclined plane problems, one with pulleys
- physxishard
- · Replies 1 ·
Difference between turning moment and bending moment
- tomtomtom1
- · Replies 6 ·
Thomson Experement, Derive deltaY between E=0 and E=E0
- garthenar
- · Replies 8 ·
Woman standing on a scale in an elevator accelerating downward
- IceCherryPop
- · Replies 10 ·
Differences in the Brightness of bulbs for 2 separate circuits
- mhrob24
- · Replies 1 ·
Using Forces and Torques to solve a pulley problem
- kepherax
- · Replies 2 ·
Why does a ball roll faster than a model car down a ramp?
- Heyxyz
- · Replies 5 ·
Removing connections between equipotential points in solving circuits?
- gregorspv
- · Replies 10 ·
Issues Determining Change in Elastic Potential Energy
- Sofa
- · Replies 2 ·
Mass attached to a rotating spring
- Santilopez10
- · Replies 20 ·
Finding the equation for final velocity in a perfectly elastic collision
- hmorenom111
- · Replies 13 ·
Conservation of energy when placing two inductors next to each other
- sudera
- · Replies 11 ·
Finding the open ckt voltage (Thevenin equivalent problem)
- rugerts
- · Replies 12 ·
Finding electric potential at a point between 3 electrodes.
- jangchen
- · Replies 6 ·
Optics Problem: What optical instrument does this?
- e101101
- · Replies 1 ·
Work in tightening a nut, given max torque and friction torque?
- Kermit_the_Phrog
- · Replies 24 ·
Two beam system with six equations and seven unknowns
- robot6
- · Replies 12 ·
Rod rotating about pin C suddenly hooks to pin D
- studentofphysics83
- · Replies 22 ·
Find unknown values of current in multi-loop circuit
- mhrob24
- · Replies 2 ·
Object movement under the infuence of Forces on the x,y axes
- Michael_0039
- · Replies 19 ·
Why does the resultant force change when I connect three vectors in different orders?
- tomtomtom1
- · Replies 5 ·
The Pressure in Interstellar Space.
- TOMMiB
- · Replies 5 ·
Object falling through liquid with quadratic drag force
- Michael_0039
- · Replies 6 ·
Trouble understanding vector hat notation - Circular Motion
- lightlightsup
- · Replies 7 ·
Why did falling tape experiment give 9.41 m/s² instead of 9.81 m/s²?
- Ellio
- · Replies 15 ·
Solve velocity addition problems using 4-vector
- Natchanon
- · Replies 8 ·
Whats the tension T' in string 1 if tension of highlighted string is T
- Physics freak
- · Replies 1 ·
Why is the Electric Field outside this wire not zero?
- bryanso
- · Replies 6 ·
Torque and inertia of a space object
- ac7597
- · Replies 4 ·
Entropy and the second law of thermodynamics
- denniszhao
- · Replies 13 ·
How to determine the number of turns of the winding?
- Leonid92
- · Replies 4 ·
Angular speed, acceleration, and angle of a Ferris wheel
- ac7597
- · Replies 4 ·
Torque and inertia of a wooden rod
- ac7597
- · Replies 4 ·
Angular acceleration and velocity in a circle
- ac7597
- · Replies 2 ·
Flux of Electric Field through a cone
- Moara
- · Replies 3 ·
What are the variables in the equation λ=xd/L in Physical Optics?
- NP04
- · Replies 4 ·
Mutual inductance between a very long, straight wire and a Semicircular loop
- peace
- · Replies 32 ·
Phase of reflected waves when loudspeaker moves toward the screen
- Sarah0001
- · Replies 3 ·
Angular momentum of a mass-rope-mass system
- Santilopez10
- · Replies 9 ·
Acceleration for a non-inertial reference frame
- Like Tony Stark
- · Replies 7 ·
Understanding a Converging Lens and Its Two Positions
- aeroboi
- · Replies 3 ·
Understanding Newton's 2nd Law of Motion
- tomtomtom1
- · Replies 6 ·
How long should error bars be on a graph?
- Ellio
- · Replies 10 ·
Physics problem - Momentum and energy
- Josep767
- · Replies 25 ·
Physical optics -- counting interfence fringes to measure a length change
- denniszhao
- · Replies 2 ·
With what speed does the cart recoil?
- posto002
- · Replies 9 ·
How to convert a slope to an acceleration?
- Ellio
- · Replies 2 ·
How close should frequencies be to show 'beating'?
- Master1022
- · Replies 13 ·