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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Photoelectric effect/finding kinetic energy.
- xxabr
- · Replies 2 ·
Why does a bike helmet design protect an egg dropped 11 meters?
- alster23
- · Replies 2 ·
Theoretical power from wind turbine
- haxxorboi
- · Replies 6 ·
Finding constant K in angular acceleration formula for two masses on a rod
- wushumaster
- · Replies 1 ·
Standing Waves on a Violin String
- kikko
- · Replies 3 ·
Calculating Car Lift Height with a Hydraulic Lift
- BeiW
- · Replies 3 ·
Calculating Efficiency of a Steam Turbine at Varying Temperatures
- name_ask17
- · Replies 9 ·
Which quantities conserve when clay hits a spinning rod?
- BARBARlAN
- · Replies 4 ·
Calculating Acceleration of Kings Dominion Drop Tower
- suwarna07
- · Replies 6 ·
Using mass of copper in both air and liquid to find density of liquid?
- DannyPhysika
- · Replies 7 ·
Elevator problem; but i don't have the mass
- jtwitty
- · Replies 4 ·
Calculating Angular Velocity and Kinetic Energy in a Rotating System
- BARBARlAN
- · Replies 5 ·
Finding acceleration and distance for a 500kg crate with applied and friction forces
- jtwitty
- · Replies 16 ·
Car with mass of 1500kg and thrust of 4000N
- jtwitty
- · Replies 3 ·
Thermodynamics- energy, pressure, volume
- name_ask17
- · Replies 16 ·
Applyings Newton 2nd Law and Kinematics
- jtwitty
- · Replies 25 ·
Determine Electric Force Due to Charges on Neg. Charged Dust Mite
- Abelard
- · Replies 6 ·
Simple Electric Field Magnitude Question
- jegues
- · Replies 2 ·
Air bubble rising from lake bottom changes volume and temperature
- name_ask17
- · Replies 15 ·
Simple Electrical Equation Advice.
- MathsRetard09
- · Replies 3 ·
Ohm's law and resistivity, again
- Marbles
- · Replies 15 ·
What does the constant term in Newton's second law mean?
- Niles
- · Replies 2 ·
Like charges repel and unlike charges
- flyingpig
- · Replies 5 ·
How Much Force Does Sunlight Exert on Earth?
- machinarium
- · Replies 1 ·
How Does Helium's Volume and Temperature Change in an Adiabatic Ascent?
- stark_1809
- · Replies 4 ·
Percentage Uncertanty and youngs modulus
- pandit bandit
- · Replies 3 ·
Which Statements About Object Motion in Physics Are False?
- Loppyfoot
- · Replies 1 ·
Thermodynamics- Gauge pressure, moles, molecules
- name_ask17
- · Replies 1 ·
What Is the Tension in the String Holding the Rotational System in Equilibrium?
- kk727
- · Replies 3 ·
How Much Heat Escapes Through a Concrete Floor in an Hour?
- name_ask17
- · Replies 14 ·
Why Do Series Circuits Show More Error Than Parallel Circuits in Experiments?
- Younglearner
- · Replies 18 ·
Finding wave frequency from phase difference
- ibysaiyan
- · Replies 4 ·
Determining which hotel guest pushed Adam Able from a window
- merx7ii
- · Replies 5 ·
Find the acceleration with very little
- Buckler
- · Replies 1 ·
How the current go through this circuit?
- machinarium
- · Replies 2 ·
How Does Temperature Affect the Depth of Mercury in a Glass Tube?
- gomdul2
- · Replies 3 ·
Resulstant force pendulum equilibrium position
- binbagsss
- · Replies 4 ·
Newton's third law, frictional force, acceleration
- furor celtica
- · Replies 2 ·
Aeroplane flight: time, displacement, velocity question
- nathangrand
- · Replies 1 ·
How Do You Calculate Wave Parameters and Displacement?
- hoyy1kolko
- · Replies 1 ·
What is the initial length of rods A and B in rod C?
- william313
- · Replies 5 ·
2 Questions of Momentum and Impulse
- wolfpack
- · Replies 5 ·
Net force is Zero, quadratic answers
- flyingpig
- · Replies 1 ·
Maximum speed on a banked road with friction
- dlingo
- · Replies 3 ·
Find the rate of change of the current in the inductor
- machinarium
- · Replies 8 ·
Electron projected in electric field: max height and displacement
- mohemoto
- · Replies 2 ·
PV diagram for ideal gas cycle with isothermal and isobaric steps
- imatreyu
- · Replies 2 ·
How Does Friction Affect a Sphere's Velocity on a Ramp?
- moondawg
- · Replies 3 ·
Law of Conservation of Energy of a downhill skier
- darkmasterz8
- · Replies 3 ·
World Lines Problem, axes as meters
- The_Doukem
- · Replies 1 ·
Block and hoop sliding up a frictionless incline
- hold AP 2010
- · Replies 1 ·
Electron Single Slit Diffraction
- hy23
- · Replies 3 ·
Hard Physics Problem - Centripetal Force
- Rbethell16
- · Replies 2 ·
Calculating Velocity of Sphere on Inclined Plane
- moondawg
- · Replies 1 ·
Initial phase determination in a wave
- Jos_Moreira
- · Replies 1 ·
How Do You Calculate the Maximum Speed in a Frictionless Pulley System?
- swannyboy
- · Replies 26 ·
Electrostatic Force in a Mad Scientist's Trap
- Abelard
- · Replies 6 ·
What is the maximum force allowed in this tension problem?
- Theorγ
- · Replies 6 ·
Calculating the Radius of a Hill for Weightless Sensation at 42 mph
- Hafsaaa
- · Replies 5 ·
Electrostatic Potencial Problem
- loba333
- · Replies 3 ·
Calculating torque and normal force on a balanced meter stick
- mahdi12572
- · Replies 1 ·
How to Calculate Potential Energy Difference for a Dipole in an Electric Field?
- loba333
- · Replies 1 ·
Mass of chair on weighing scale and wall
- dmouthfan2028
- · Replies 2 ·
Physics maths calculus charge calculations
- electro 1982
- · Replies 4 ·
Which way does electric field line go?
- cashflow
- · Replies 1 ·
What Charge Must an Oil Droplet Have to Balance Gravity in an Electric Field?
- Magna1
- · Replies 4 ·
What happens when charged spheres touch?
- jegues
- · Replies 4 ·
How Many Photons Hit Your Retina from a Distant Light Source?
- hy23
- · Replies 3 ·
Calculating Time for a Mass to Hit the Floor on a Pulley System
- Havenater23
- · Replies 16 ·
Calculating Velocity After Elastic Collision: Kinetic Energy Problem
- ashvinthecha
- · Replies 5 ·
Circulation Motion - Airplane Loop
- Rbethell16
- · Replies 1 ·
Calculating Capacitance: Series vs Parallel
- cupid.callin
- · Replies 4 ·
Tension in string for vertical circular motion
- ghostbuster25
- · Replies 4 ·
How Do You Calculate Forces on a Banked Curve with Friction for a Race Car?
- James_fl
- · Replies 19 ·
Rotating the Resultant Force on a Charge
- jegues
- · Replies 1 ·
Question on electric filed of an insulating cylinder
- loba333
- · Replies 5 ·
Energy And Electric Field In Circuits
- didas
- · Replies 7 ·
Finding the de Broglie wavelength from momentum
- Matty R
- · Replies 3 ·
Solving a Vertical Ball Throwing Problem: Velocity and Time Calculation
- inbetween
- · Replies 2 ·
What effects does a conductor have on a circuit. How can they be minimised?
- MathsRetard09
- · Replies 2 ·
Can we use gauss' law to find the e field of a finite line of charge?
- scrappy
- · Replies 7 ·
Heat transferred when gas is compressed at constant temperature
- jimmy42
- · Replies 1 ·
Frequency of physical pendulum made from four sticks forming a square
- emr13
- · Replies 22 ·
Spring toy launched at 78° to find maximum height
- -Dragoon-
- · Replies 2 ·
Resultant Force on Charge in the middle of square
- katia11
- · Replies 4 ·
Minimum Electrical Potential Difference required to stop Alpha particle
- clarence.p
- · Replies 3 ·
What is the Internal Energy of an Ideal Gas at Given Conditions?
- dlthompson81
- · Replies 2 ·
How Do You Calculate the Net Gravitational Force on a Mass in a 3D Force System?
- harrysawizard
- · Replies 4 ·
How can the mass of an object be determined with given variables?
- suwarna07
- · Replies 1 ·
Special Relativity: Which notation to use
- Matty R
- · Replies 1 ·
What is the tension in the rope?
- Theorγ
- · Replies 11 ·
Electromotive force in constant flux
- player1_1_1
- · Replies 7 ·
Placing a 3rd charge so there is no net force
- jegues
- · Replies 15 ·
Point of Equilibrium between two charges
- jegues
- · Replies 9 ·
Constructive or destructive interference- Car radio
- sbayla31
- · Replies 7 ·
Charge question A, B, C Explanation
- flyingpig
- · Replies 4 ·
Does moment of inertia equal zero when an object is not spinning?
- flyingpig
- · Replies 13 ·
Charges placed on a hexogon, working out the force and energy
- loba333
- · Replies 9 ·
Can someone explain the concept of Mass-Energy Equivalence in simple terms?
- skoks
- · Replies 3 ·
Question on series solutions of diff equations
- blueyellow
- · Replies 1 ·