Introductory Physics Homework Help Forum

Post thread
Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Electrical: Reduce the expression to the form V_mcos(wt+theta)
  • Northbysouth
  • · Replies 3 ·
Replies
3
Grade 11 Physics Projectile Motion Question
  • mmChocolate
  • · Replies 4 ·
Replies
4
Conservation of momentum with sprins
  • Matt_h
  • · Replies 1 ·
Replies
1
Significant Digits Ruler -To what decimal point
  • vvfrn3
  • · Replies 3 ·
Replies
3
What Exactly is Thermal Energy?
  • Nexu
  • · Replies 1 ·
Replies
1
Compound microscope focal length
  • Cataklyzm
  • · Replies 2 ·
Replies
2
Calculate the speed of a body which slides through a string
  • sv_heavymetal
  • · Replies 2 ·
Replies
2
Calculating amplitude of pendulum
  • chicagobears34
  • · Replies 5 ·
Replies
5
Moment of Inertia - Swinging arms
  • elemis
  • · Replies 4 ·
Replies
4
What are the reactions and forces in a pin-jointed framework?
  • MMCS
  • · Replies 6 ·
Replies
6
Capacitor in a Parallel Circuit
  • PhotonTrail
  • · Replies 2 ·
Replies
2
Hollow spherical earthed conductor
  • @mit
  • · Replies 1 ·
Replies
1
What is the internal energy of 8.0 g of argon gas at a temperature of 100 K?
  • kingstar
  • · Replies 1 ·
Replies
1
Electrical Resistance, Current and Voltage in Parallel and Series
  • Felchi
  • · Replies 9 ·
Replies
9
How do you calculate the magnetic field strength in a coiled wire?
  • Ryoblck
  • · Replies 18 ·
Replies
18
Two dimensional relative motion; boat and river problem
  • physicsstdnt
  • · Replies 8 ·
Replies
8
Interference from two radio antennae - simplistic and workings include
  • elemis
  • · Replies 6 ·
Replies
6
Routine and simplistic Bragg law question - Just need confirmation.
  • elemis
  • · Replies 3 ·
Replies
3
Different tensions in a pulley system and acceleration
  • fredrogers3
  • · Replies 8 ·
Replies
8
Change in the acceleration of Gravity given resistance
  • jackthompson
  • · Replies 1 ·
Replies
1
IPA Potential Energy Approximation
  • TerraForce469
  • · Replies 13 ·
Replies
13
Physics - Inclined Plane - Experimental Investigation
  • Christine L
  • · Replies 3 ·
Replies
3
Help with plastic bridge design
  • Tesla42
  • · Replies 4 ·
Replies
4
Calculate Torque on Unicycle for Homework Statement
  • SherlockOhms
  • · Replies 7 ·
Replies
7
Maximum frictional force experienced and the acceleration
  • gerard.caleb
  • · Replies 6 ·
Replies
6
The figure shows a PV diagram for 2.69 mole of oxygen gas in a sealed
  • billsauce
  • · Replies 1 ·
Replies
1
Two people on a boat(center of mass)
  • Toranc3
  • · Replies 16 ·
Replies
16
Understanding the Relationship Between Elasticity and Young's Modulus
  • carnot cycle
  • · Replies 3 ·
Replies
3
Apparent Height in a Swimming Pool
  • rmcgovern
  • · Replies 2 ·
Replies
2
Gravitational field strength of 0
  • inuyasha555
  • · Replies 1 ·
Replies
1
Work and Energy (Kinetic Energy/Grav. Potential Energy)
  • kitty075
  • · Replies 4 ·
Replies
4
Object Height In a Plane Mirror
  • rmcgovern
  • · Replies 2 ·
Replies
2
Friction and blocks, pulling force resolving
  • caspernorth
  • · Replies 5 ·
Replies
5
Tension and Fundamental frequency
  • Big-Daddy
  • · Replies 1 ·
Replies
1
How do you find frequency given this wave graph?
  • cmkc109
  • · Replies 5 ·
Replies
5
Catapult MA: Wheel & Axle, Lever, Crank?
  • dbmorpher
  • · Replies 1 ·
Replies
1
Why Does My Acceleration Calculation Differ from the AP Mechanics Scoring Guide?
  • tony873004
  • · Replies 3 ·
Replies
3
Finding vertical velocity at highest point in trajectory
  • honey.s
  • · Replies 3 ·
Replies
3
Velocity & Acceleration Question
  • whitehorsey
  • · Replies 7 ·
Replies
7
Resistor in a Circuit with varying resistance.
  • Jonnyto
  • · Replies 4 ·
Replies
4
Kirchoff's Rule(How do I find equivalent resistance?)
  • jawhnay
  • · Replies 5 ·
Replies
5
Best fit value of eddy thermal diffusivity
  • rico22
  • · Replies 6 ·
Replies
6
How Is the Driving Torque Calculated for a Hoist Drum in Rotational Dynamics?
  • MMCS
  • · Replies 2 ·
Replies
2
Resistance of a Copper Wire with initial and final radius
  • jawhnay
  • · Replies 8 ·
Replies
8
Calculating Energy Stored in a Fully Charged Battery
  • aziiri
  • · Replies 1 ·
Replies
1
What is the phase of the SHM at that point
  • Voltrical
  • · Replies 1 ·
Replies
1
Air flow pipe size reduction|Incompressible&Lossless COMPLETED ANSWER
  • DylanW
  • · Replies 1 ·
Replies
1
Find the angles for the basketball throw, projectile problem
  • gpmattos
  • · Replies 3 ·
Replies
3
Rotational and angular speed problem
  • freshcoast
  • · Replies 1 ·
Replies
1
Which diagram below best representsthe shape ofthe rope when both puls
  • cmkc109
  • · Replies 1 ·
Replies
1
Newton's Three Laws: 1st and 3rd
  • whitehorsey
  • · Replies 2 ·
Replies
2
Baseball runner asking for velocity to an out
  • Robertoalva
  • · Replies 2 ·
Replies
2
For this instant calculate the magnitudes of the force F and torque M
  • Northbysouth
  • · Replies 1 ·
Replies
1
Finding Velocity with Kinetic Energy.
  • kencamarador
  • · Replies 3 ·
Replies
3
Parametric Equations of Keplerian Orbit
  • derravaragh
  • · Replies 7 ·
Replies
7
Maximizing Angular Velocity to Prevent Slipping in a Rotating Cylinder Ride
  • lemaitre
  • · Replies 5 ·
Replies
5
How Do You Calculate Average Angular Acceleration with Axis Orientation Change?
  • Aseri
  • · Replies 1 ·
Replies
1
Geometrical Optics (lens and refraction)
  • songoku
  • · Replies 7 ·
Replies
7
Solving an Inclined Plane Problem: Help for Neil
  • Neilthe4th
  • · Replies 2 ·
Replies
2
Solving for Speed of a Moving Car with Sound Frequency
  • Jbreezy
  • · Replies 5 ·
Replies
5
Can we accurately predict the speed of light using the index of refraction?
  • bowlbase
  • · Replies 2 ·
Replies
2
Find the max induced EMF in the loop by the changing loop
  • SpringWater
  • · Replies 5 ·
Replies
5
Estimate the fundamental frequency of resonance sound induced by blowi
  • cmkc109
  • · Replies 1 ·
Replies
1
Calculate the Tension and Angular Acceleration in Log After Release
  • Northbysouth
  • · Replies 1 ·
Replies
1
Comet Elliptical Orbits Question
  • Chaso
  • · Replies 6 ·
Replies
6
What is the valance and conduction band?
  • Levi Tate
  • · Replies 2 ·
Replies
2
Finding the Charge on a Capacitor in a Circuit
  • pietastesgood
  • · Replies 13 ·
Replies
13
Dog walking on a raft on water then suddenly halting
  • totallyclone
  • · Replies 3 ·
Replies
3
How do I find the tension in two cables holding up a sign at a 50 degree angle?
  • joshuajen
  • · Replies 5 ·
Replies
5
Contiuation Kirchhsoffs Circuit Problem
  • Pruddy
  • · Replies 2 ·
Replies
2
Cyclist coasting down a hill cons. of energy
  • totallyclone
  • · Replies 4 ·
Replies
4
Estimating the energy of an emitted photon in gamma decay
  • dungonyu
  • · Replies 5 ·
Replies
5
Maximizing Diffraction of Water Waves through a Single-Slit Barrier
  • Deathnote777
  • · Replies 8 ·
Replies
8
How Do You Solve This 3D Forces and Moments Problem?
  • Wesc
  • · Replies 1 ·
Replies
1
What is the Kinetic Energy of a Projectile Just Before Impact?
  • RuthlessTB
  • · Replies 6 ·
Replies
6
Help with an Average Acceleration question during a time period
  • honey.s
  • · Replies 1 ·
Replies
1
What are the forces acting on the chandelier?
  • cmkc109
  • · Replies 4 ·
Replies
4
How Do You Calculate Time Along a Path in Polar Coordinates?
  • vmedica
  • · Replies 7 ·
Replies
7
Static friction and kinetic friction
  • salmacho
  • · Replies 7 ·
Replies
7
Apparent power, impedance and alternating current.
  • 0fibonacci1
  • · Replies 1 ·
Replies
1
Period and angular frequency problem.
  • 0fibonacci1
  • · Replies 1 ·
Replies
1
Calculating Effective Current, Maximum Current, and Current at Time 1s
  • 0fibonacci1
  • · Replies 1 ·
Replies
1
Find Photons per second on the eye from a source a distance away
  • rocapp
  • · Replies 7 ·
Replies
7
Mirrors, Polaroid Films, Light/Wavelength help needed
  • riseofphoenix
  • · Replies 19 ·
Replies
19
Finding electric field and force at a point
  • cherry_cat
  • · Replies 1 ·
Replies
1
Kirchhsoff's Circuit Law (Loop Rule Equation)
  • Pruddy
  • · Replies 6 ·
Replies
6
Doppler Effect Question regarding wavelength changing
  • Shahzad7317
  • · Replies 2 ·
Replies
2
Determine the Acceleration of the of the Initally Stationary Block
  • Northbysouth
  • · Replies 5 ·
Replies
5
Simple Coulomb's Law Question
  • p.ella
  • · Replies 7 ·
Replies
7
Finding mass of a nonuniform sphere, given a function for density
  • Tubefox
  • · Replies 3 ·
Replies
3
The drawing shows a lower leg being exercised. It has a 49 N weight a
  • cmkc109
  • · Replies 1 ·
Replies
1
Velocity of air moving past a duct.
  • Jbreezy
  • · Replies 1 ·
Replies
1
Is F = Δp/Δt Equal to F = ma in This Algebra Question?
  • JoshuaOB
  • · Replies 2 ·
Replies
2
Rotational Motion of a toy airplane
  • SChiO
  • · Replies 1 ·
Replies
1
What is the Capacitance of a Charging RC Circuit with Known Time and Resistance?
  • Kashuno
  • · Replies 2 ·
Replies
2
How Does Moving a Wire Through Earth's Magnetic Field Generate Current?
  • Mashfeek
  • · Replies 1 ·
Replies
1
Understanding Circuit Diagrams: Ideal Conductors and Physical Components
  • ehabmozart
  • · Replies 10 ·
Replies
10
How Much Does a Marble Column Compress Under Load?
  • Jbreezy
  • · Replies 3 ·
Replies
3
Mechanical engergy, energy conservation
  • Gewitter_05
  • · Replies 1 ·
Replies
1
Estimating Atom Size using the Uncertainty Principle
  • Quantum_man
  • · Replies 6 ·
Replies
6