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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What is the spring's length and constant in Hooke's law with buoyancy force?
- vinamas
- · Replies 2 ·
Elastic collision between Tarzan and Jane using energy conservation
- dlynch851
- · Replies 2 ·
Kinematic Question -- Car braking to avoid hitting a pedestrian
- Erin Pashanov
- · Replies 6 ·
What is the Work Done on the Person+Sled System in an Amusement Park Ride?
- Brandon 456
- · Replies 1 ·
Hydraulic diameter vs hydraulic radius
- hotjohn
- · Replies 2 ·
Isolated Point Charge and Work?
- hrf2
- · Replies 2 ·
How to find the horizontal distance from projectile motion?
- Eclair_de_XII
- · Replies 9 ·
Capacitance Question - Total Energy, Potential Difference
- ratinatinycar
- · Replies 7 ·
What is the Acceleration of a Vehicle at Different RPMs?
- Triple88a
- · Replies 6 ·
Determining Direction of Tension Force: Find Answers Here
- Balsam
- · Replies 2 ·
Archived Simple roulette in terms of circular motion
- Mahowny
- · Replies 2 ·
What is the Final Velocity of Puck B After Collision?
- Simoncoolstan
- · Replies 11 ·
How does opening multiple valves affect the water flow through pipes?
- lurifax1
- · Replies 5 ·
What is the opposite direction of E 20° N?
- Balsam
- · Replies 3 ·
Half-life from radioactive decay dice model
- Michael1974
- · Replies 1 ·
Ranking proton accelerations in a uniform electric field
- Philip KP
- · Replies 33 ·
Finding hill height for 35kg child on 5kg sled reaching 30 km/h
- GalacticSnipes
- · Replies 6 ·
Magnetic field from a wire segment using Biot-Savart law
- meaghan
- · Replies 3 ·
How Many Hours Must Bulbs Burn to Save $73 Million Annually?
- theone
- · Replies 2 ·
How to Determine Flow Rate in a Pipe Using Fluid Dynamics?
- lurifax1
- · Replies 1 ·
How Long Until a Crate Reaches a Specific Velocity on an Incline?
- _N3WTON_
- · Replies 17 ·
What does the symbol F_net mean in Coulomb's law problems?
- ssnapier
- · Replies 2 ·
Internal and external forces in momentum
- Biker
- · Replies 4 ·
IV curves for motor and Thevenin source don't intersect
- Marcin H
- · Replies 20 ·
Atomic Nucleus (first year college)
- Michael1974
- · Replies 1 ·
How Does Rolling Friction Affect a Toy Train's Motion on a Circular Track?
- popo
- · Replies 10 ·
Coefficient of static and kinetic friction for a sofa
- Belma
- · Replies 8 ·
Newton's first law, forces, charges
- heartshapedbox
- · Replies 4 ·
Finding Spring Constant from Mass and Extension
- Prathamesh
- · Replies 14 ·
How do you calculate the length of a board using torque?
- confused111
- · Replies 4 ·
Calculating errors after curve fitting (linearizing) graphs
- Orha
- · Replies 17 ·
Find tension in cables supporting giant swing
- heartshapedbox
- · Replies 9 ·
Find transformation matrix for 120° rotation about equal-angle axis
- AndresPB
- · Replies 17 ·
Why is pressure difference ignored at points 1 and 2 in the energy equation?
- foo9008
- · Replies 8 ·
Calculating Revenue for a Geothermal Power Plant with 150kW Steam Flow at 180°C
- theone
- · Replies 5 ·
Question on theory for solving 2015 AP Physics C Free Response Questions
- RoboNerd
- · Replies 12 ·
Capacitor Energy With Different Dielectrics
- recursive
- · Replies 2 ·
Question regarding a two-lens system
- pisquared
- · Replies 4 ·
Trouble Determining Moment Arm (aka Lever Arm)
- x2017
- · Replies 12 ·
How to Calculate Resistors in Parallel Uncertainty
- LCHL
- · Replies 3 ·
Why is FTcosθ - mg = 0 for a pendulum in an accelerating car?
- Frankenstein19
- · Replies 1 ·
Conceptual question on angular momentum and Emech.
- RoboNerd
- · Replies 7 ·
Why Do Objects in Elastic Collisions Sometimes Share or Transfer Velocities?
- Biker
- · Replies 3 ·
Archived Problem with non linear increase in voltage/amperage
- samsanof
- · Replies 1 ·
What is the Internal Energy of 158 moles of CO2
- ConorDMK
- · Replies 3 ·
Solving a Term about gravitation to r
- wiegetz
- · Replies 2 ·
Change in time period of pendulum
- Vibhor
- · Replies 7 ·
Why Does Water Flow from Low to High Energy Levels?
- foo9008
- · Replies 2 ·
Apparent weight loss 2nd Newtons Law elevator problem
- Frankenstein19
- · Replies 4 ·
Tension variation in a rotating rope
- sebas
- · Replies 8 ·
Why can't I find acceleration by dividing distance by speed?
- Frankenstein19
- · Replies 4 ·
Does a car accelerating 0-60 in 3 seconds use more energy than in 8 seconds?
- brycenrg
- · Replies 16 ·
Calculating Vertical +Horizontal Forces of Beam in Equilib.
- King_Silver
- · Replies 4 ·
Finding potential differences across ideal diode and resistor with forward bias
- Potatochip911
- · Replies 3 ·
Final velocity of two railroad cars after inelastic collision
- jakeginobi
- · Replies 5 ·
Momentum density of states for pion decay.
- pondzo
- · Replies 3 ·
Electron in a box - wavelength of photon
- yango_17
- · Replies 3 ·
Collision Conservation of Energy
- jakeginobi
- · Replies 1 ·
Conservation of energy at terminal velocity
- Jake 7174
- · Replies 3 ·
Ground wave vs. sky wave stability
- Titan97
- · Replies 7 ·
Finding number of charges using Coulomb's Law
- Dr. Who
- · Replies 1 ·
Find resistance of resistor connected in series
- PhysicsBoyMan
- · Replies 9 ·
Reflection coefficient for air-to-glass transverse electric wave
- nmsurobert
- · Replies 1 ·
What is the work and power involved in pushing a cart at a 30 degree angle?
- DeepPatel
- · Replies 3 ·
Solve Work-Energy Problem for Girl Cliff Diving
- DeepPatel
- · Replies 1 ·
Electric field between inner and outer cylinder
- Brennen berkley
- · Replies 2 ·
Vectors A + B: Are Any of the Above True?
- Ryan McCormick
- · Replies 4 ·
Man sledding down 30-degree hill with friction and initial velocity
- DeepPatel
- · Replies 31 ·
Tension in cord for three-block pulley system with block on table
- edgarpokemon
- · Replies 3 ·
Why is the efficiency of a rubber band slingshot constant
- CTHAEH
- · Replies 4 ·
Calculating the charge to mass ratio
- WestTXcollegekid
- · Replies 12 ·
How does emf relate to current, potential and resistance in circuits?
- PhysicsBoyMan
- · Replies 1 ·
How Do You Calculate Net Force on a Diver?
- Haley Heldt
- · Replies 8 ·
Inductance of solenoid (length = diameter)
- lcr2139
- · Replies 2 ·
Is moment of inertia only for rotating objects?
- Titan97
- · Replies 11 ·
Maximum balloons from helium cylinder at constant temperature
- MadTay
- · Replies 4 ·
What is the speed of sprinter running away from lens?
- romeIAM
- · Replies 8 ·
What Are the Forces in Truss Members BH and HG?
- sophiebeth100
- · Replies 5 ·
Is state an energy eigenstate of the infinite square well
- acdurbin953
- · Replies 2 ·
Why doesn’t the motor start right away?
- Marcin H
- · Replies 9 ·
Archived Spectrometer CCD Homework: Calculate Spectral Range for m=4
- woaini
- · Replies 1 ·
Marble dropped from elevator in Kleppner problem
- Tahmeed
- · Replies 1 ·
How do I combine equations for absolute independent motion with pulleys?
- JustDerek
- · Replies 3 ·
Solving Satellite Orbit Problem: Finding Time in Hours
- Giu1iano
- · Replies 3 ·
Calculating the Radius of a Metallic Ball
- vinamas
- · Replies 8 ·
Magnetic Field of Spherical Electromagnetic Wave
- Darly
- · Replies 1 ·
Magnetic field of a moving charge
- squeak
- · Replies 1 ·
Finding Magnitude of Magnetic Field
- Travkid
- · Replies 6 ·
Transformations of energy in oscillatory motion
- mcaay
- · Replies 3 ·
Simplifying forces for a block on an incline with applied force
- Asleky
- · Replies 5 ·
Total Length of a Stretched Spring: How Do I Calculate It?
- jakeginobi
- · Replies 4 ·
Why is the capacitor current positive in nodal analysis when current flows into the node?
- timnswede
- · Replies 2 ·
Motion of charge in electric and magnetic fields
- krbs
- · Replies 8 ·
Determine the location of her center of mass
- ual8658
- · Replies 5 ·
Circuit with Four Resistors and Two Switches
- Jake Russell
- · Replies 4 ·
Problem using Newton's 2nd Law F= m x A
- Bob K99
- · Replies 6 ·
Required heat, entropy change of object dropped in water
- ElectricEel1
- · Replies 3 ·
What time interval between wave fronts in S and S'?
- Breadsticks
- · Replies 5 ·
Acceleration of object at specific height?
- KDprevet
- · Replies 8 ·
Are these torques correct for a simple balancing/fulcrum exp
- Robert Parsons
- · Replies 4 ·