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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Measuring resistance accurately?
- BioCore
- · Replies 4 ·
The proabability density of an electron
- worries
- · Replies 2 ·
Current needed for zero tension in suspended conductor in magnetic field
- adwlacrosse75
- · Replies 5 ·
Consevation of energy in collisions
- rugapark
- · Replies 4 ·
Alternating source driving RLC circuit
- phyzmatix
- · Replies 4 ·
Solve Capacitor Problem: C1,C2,C3 Charge/Voltage
- tracie
- · Replies 5 ·
Calculating Energy Usage for a Jet Airliner
- girlinterrupt
- · Replies 4 ·
What Is Sam Doing Wrong in His Friction and Distance Calculation?
- osker246
- · Replies 3 ·
How Do You Calculate the Intersection Time of a Particle and a 3D Pill Shape?
- 21omega12
- · Replies 1 ·
How to get the elongation with modulus of elasticity as the given?
- makubexiii
- · Replies 1 ·
How do low-frequency electromagnetic fields induce currents in the human body?
- elkface
- · Replies 4 ·
Induced Emf, Contributing factors
- K3nt70
- · Replies 1 ·
Total internal reflection in glass slab surrounded by liquid
- cgaleb
- · Replies 7 ·
Why Do Magnetic Fields Differ in Right Hand Rule Illustrations?
- WardenOfTheMint
- · Replies 1 ·
Is this how I would determine the force?
- HELP_786
- · Replies 1 ·
Finding spring constant k from mass and period of oscillation
- HELP_786
- · Replies 10 ·
Optics and Cameras: Why Does a Camera Get Wider/Longer?
- poweroffive
- · Replies 3 ·
How Does Lenz's Law Determine Current Direction in Moving Loops and Magnets?
- K3nt70
- · Replies 5 ·
Analyzing a Concurrent Force System with Looping Cords and Pulleys
- jara
- · Replies 3 ·
Calculating Neutron Binding Energy in 13-C
- MeKnos
- · Replies 4 ·
Kirchhoff's Laws with 3 voltage sources
- ae4jm
- · Replies 9 ·
How Do You Calculate the Length of Wire in a Generator Coil?
- thompson.1674
- · Replies 1 ·
What is the rate of fission events in the reactor core?
- LamyJamy
- · Replies 6 ·
Solving for Speed: Chip Dipped in Dip w/ Radius .5m
- bigdaddy
- · Replies 2 ·
Solve Kirchhoff Problem: Find Voltages of Resistors
- pisay
- · Replies 2 ·
Boat Hauling Skier: Calculating Acceleration
- bigdaddy
- · Replies 3 ·
How Close Does the Alpha Particle Get to the Platinum Nucleus?
- BubbaJonze
- · Replies 3 ·
Is My Derivative Calculation for a Logarithmic Function Correct?
- xxclaymanxx
- · Replies 3 ·
Geostationary Orbit: Calculating Distance from Earth
- HarrisonColes
- · Replies 3 ·
What Direction Does the Coil Rotate in a Magnetic Field?
- Darth Geek
- · Replies 1 ·
Hydrodynamics:Bernoulli's equation
- woollyyak
- · Replies 8 ·
Work done moving a proton toward a +3 microcoulomb charge from 50 cm to 35 cm
- kitkat2950
- · Replies 2 ·
Taking Apart an Alpha Particle
- conniechiwa
- · Replies 13 ·
What Factors Affect the Emission of a Photon by an Electron?
- NATSALANE
- · Replies 1 ·
Solving Complex Structural Challenges - Can a 1000kg Lift Force Lift 950kg?
- alibaba2
- · Replies 1 ·
Frequency of light to eject electrons from gold
- mhooker_10
- · Replies 4 ·
Should I ignore the air column when calculating pressure difference between pipelines?
- noobies
- · Replies 7 ·
Moving conductors in magnetic field with Kirchhoff's law
- jimmycnj99
- · Replies 5 ·
Work Done In space - Satellites
- Renren
- · Replies 9 ·
Calculating max. kinetic energy (photoelectric)
- NATSALANE
- · Replies 6 ·
Temperature Change and Volume Expansion
- yellowgators
- · Replies 3 ·
How Is the Magnetic Field Calculated at the Midpoint of a Helmholtz Coil?
- phyzmatix
- · Replies 2 ·
Projectile motion: acceleration at top, speed extrema, and reference frames
- mizulyn
- · Replies 1 ·
Bernoulli's equation and a stream of water
- ttk3
- · Replies 1 ·
Temperature & Heat Homework: Coffee at 86.987°C
- Kris1120
- · Replies 6 ·
What is the activity of 99Tc in a pharmaceutical after 1.5 hours?
- conniechiwa
- · Replies 1 ·
CALCULATING TEMPERATURE CHANGE FROM THORIUM DECAY
- LamyJamy
- · Replies 2 ·
Calculating Engine Power for Headlights: Solving for Efficiency and Resistance
- 4eleven
- · Replies 3 ·
Entropy of system with ice cube in lake
- Brunno
- · Replies 5 ·
Metal bar on conducdting rod take 2 (didn't post first time)
- medguy1234
- · Replies 1 ·
What is the entropy change of the meteor
- kitkat2950
- · Replies 1 ·
Weight = Pressure * Total Area
- #H34N1
- · Replies 5 ·
Finding distance of a planet whose orbital period is 2x Earth
- JohnGalt
- · Replies 2 ·
Calculating normal force in a loop-the-loop situation
- jeanjacket
- · Replies 2 ·
Interesting Electric Field and Spring Problemf
- caesius
- · Replies 1 ·
Potential difference across airplane wings in Earth's magnetic field
- Darth Geek
- · Replies 5 ·
Power and torque what did i do wrong?
- ahello888a
- · Replies 3 ·
Electric Potential Energy and Electric Potential Difference
- predentalgirl1
- · Replies 2 ·
Changes to electric field between two parallel plates
- chartreuse
- · Replies 1 ·
Why is F=ma not applicable in this work and kinetic energy problem?
- adkinje
- · Replies 1 ·
Understanding Conventional Current and the Right Hand Rule for B-Field Direction
- learning_phys
- · Replies 2 ·
I need the final velocity of two balls
- cuajin
- · Replies 2 ·
Satellite orbital energy with varying gravity at height
- Lexington
- · Replies 4 ·
Calculating moment of inertia for a yo-yo with two disks and a hub
- ahello888a
- · Replies 13 ·
Charges, conservation of energy
- Tentothe
- · Replies 3 ·
An 800 MW electric power plant
- Thankful_LV
- · Replies 5 ·
How fast must a satellite leave Earth's surface
- fizzyy
- · Replies 3 ·
Rotational Motion and Gravity/Planetary Orbits review
- vdfortd
- · Replies 9 ·
Does a massive pulley increase total kinetic energy in a system?
- devanlevin
- · Replies 1 ·
Work and Heat Flow of a Heat Engine Cycle
- ally1h
- · Replies 2 ·
Capacitor and Potential. EN - weird solution
- hulkster1988
- · Replies 3 ·
Question regarding force on a square loop due to a magnetic field
- soumyasch
- · Replies 3 ·
What Determines the Poynting Vector in an Electromagnetic Wave?
- waiting
- · Replies 1 ·
Calculating R and C on an AC circuit.
- ascii
- · Replies 1 ·
Rate of radiation coming from inside a container
- cyclonefb3
- · Replies 1 ·
How Do You Calculate the Kinetic Energy of a Stretched Spring?
- atri.shivam
- · Replies 2 ·
How much does the spring stretch connecting a car and trailer?
- GeoKenshin
- · Replies 3 ·
Moment of inertia of a rectangular door hinged on long side
- ahello888a
- · Replies 3 ·
Light ray refraction through glass prism in air and water
- 3gowns
- · Replies 1 ·
Advanced Extension Physics Past Papers Needed - AEA
- alias25
- · Replies 2 ·
Which Acceleration Formula is Correct for the Larger Block in the Pulley System?
- dk_ch
- · Replies 3 ·
Solving Spring Constant: A 760N Weight Puzzle
- GeoKenshin
- · Replies 2 ·
Solve De Broglie Waves Homework
- conniechiwa
- · Replies 5 ·
Block of ice melts - entropy of ice?
- ally1h
- · Replies 5 ·
What Is the Correct Spacing for Diffraction Grating Lines?
- tambourine
- · Replies 1 ·
Varying the voltage of a light bulb
- sanado
- · Replies 1 ·
Forces on anchors in pulley system with 100kg load
- BBB
- · Replies 13 ·
Calculate X-Ray Wavelength for Lead Target
- conniechiwa
- · Replies 2 ·
Momentum of rubber bullet problem
- shehri
- · Replies 1 ·
Understanding Charge Movement in Discharge Lamps
- ascii
- · Replies 7 ·
Air resistance of a thrown object
- devanlevin
- · Replies 1 ·
Using electric force to find the force of gravity
- lostcompass
- · Replies 3 ·
Solving a Fishy Collision: Velocity After Impact
- HelloMotto
- · Replies 1 ·
Potential of charged disk for x R
- qamptr
- · Replies 3 ·
Torque and Rockets for Spinning Satellites
- ahello888a
- · Replies 4 ·
Light refracted through Prism question
- waiting
- · Replies 1 ·
Find index of refraction of the prism for 2 wavelengths
- Ed Boon
- · Replies 3 ·
How Much Power Does a 1500-kg Racecar Need to Reach 90 km/h in 5 Seconds?
- JustinKim
- · Replies 2 ·
Basic kinematics - conceptual questions
- mizulyn
- · Replies 2 ·
Period of an electric dipole rotating in an external electric field
- wimvd
- · Replies 2 ·