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 toll for an electron to escape a metal surface?
- Jeff97
- · Replies 9 ·
Ring attached to elastic and inextensible strings
- songoku
- · Replies 8 ·
Wavelength of the red colour of this helium discharge tube
- songoku
- · Replies 4 ·
Modeling a wingsuit base jumper's speed
- v42Waeger
- · Replies 1 ·
Kinetic Energy of Colliding Protons
- Kharrid
- · Replies 54 ·
Solving Dependence of Velocity on Time
- fer Mnaj
- · Replies 8 ·
Value of the shunt resistor in this circuit
- Bolter
- · Replies 6 ·
Are these answers correct?
- chriscarson
- · Replies 5 ·
Validating a Modified Biot-Savart Law
- HAgdn
- · Replies 16 ·
Rotational Motion Problem with Varying Centripetal Force and Friction
- Pi-is-3
- · Replies 10 ·
Boundary conditions in dielectric problems
- RickRazor
- · Replies 2 ·
Balance length for a potentiometer circuit
- Bolter
- · Replies 1 ·
Why don't connected metal spheres distribute charge equally?
- lightlightsup
- · Replies 12 ·
Calculating the current through this load resistor
- Bolter
- · Replies 2 ·
Uncertainty for n using calculus
- SHAWN JAMES
- · Replies 2 ·
Working out the shunt resistance for a galvanometer circuit
- Bolter
- · Replies 7 ·
Regarding the work done against air resistance
- vodkasoup
- · Replies 2 ·
Finding the center of gravity with torque
- ari-anne
- · Replies 3 ·
Discharging this capacitor in an RC bridge circuit
- Karl Karlsson
- · Replies 10 ·
Finding the resistance of this shunt resistor
- Bolter
- · Replies 16 ·
Can a Simple Formula Estimate Train Energy Consumption?
- george95
- · Replies 29 ·
Flow Rate (Q) of Viscous Flow between Two Plates
- WhiteWolf98
- · Replies 17 ·
Finding the density order of three floating bodies with different submersion depths
- brotherbobby
- · Replies 4 ·
Finding distance traveled up slope with friction
- MathDestructor
- · Replies 15 ·
Image position in an optical system?
- nordmoon
- · Replies 5 ·
Angular velocity of a bullet and two masses
- Like Tony Stark
- · Replies 12 ·
Torque on a rotating system system
- Saptarshi Sarkar
- · Replies 1 ·
Fraction of valence electrons free for conduction
- jisbon
- · Replies 8 ·
Finding net force on charge with Coulomb's law
- r-swald
- · Replies 6 ·
Reaction force acting at the wheels of cars when turning
- Like Tony Stark
- · Replies 6 ·
Location where the electric potential is zero between charges
- songoku
- · Replies 4 ·
Correct statement about a concave mirror
- songoku
- · Replies 26 ·
Angular Momentum Conservation in Spacecraft Orbits
- Like Tony Stark
- · Replies 10 ·
How can I make a simple inductive MHD thruster in water simulation?
- fRod57
- · Replies 3 ·
Measuring the Distance between the Fringes of a Diffraction Grating
- KDPhysics
- · Replies 14 ·
Energy conservation for objects hanging from a pulley
- agusb1
- · Replies 6 ·
Velocity of a 1-kg block after it has dropped 0.54 m
- volcore
- · Replies 33 ·
Young's modulus question with answer notation issue
- chriscarson
- · Replies 19 ·
dilution calculation using c1v1 formula
- Ifrah tahir
- · Replies 2 ·
Determining the resistivity of intrinsic Germanium
- jisbon
- · Replies 9 ·
How to calculate power output of a car accelerating uphill
- Carrie9
- · Replies 19 ·
Can High Activation Energy Explain the Rapid Discharge of Capacitors?
- volodymyr379
- · Replies 7 ·
Relative velocity vector addition with negative components
- LR5
- · Replies 23 ·
How to link frequency and speed? Doppler effect
- greg_rack
- · Replies 4 ·
Calculating electron drift velocity
- jisbon
- · Replies 2 ·
Finding the amount of a uranium-238 atom's internal energy that is released
- volcore
- · Replies 23 ·
Water flowing out of a tank through a hole
- brotherbobby
- · Replies 24 ·
Mechanics Problem using Polar Coordinates
- MathDestructor
- · Replies 13 ·
How Much Weight Can the Air-Conditioning Unit on a Sloped Roof Hold?
- dust66
- · Replies 7 ·
Swimmer crossing river at angle to current analogy
- aj_17
- · Replies 2 ·
Transition from Elastic to Inelastic collision
- Saptarshi Sarkar
- · Replies 18 ·
Thin film interference with 100nm thickness at visible wavelengths
- jisbon
- · Replies 3 ·
How do I find the other charge using electric potential?
- moeug1999
- · Replies 3 ·
Ohm's law and Kirchoff — What am I missing?
- vlady66
- · Replies 4 ·
Is the angular acceleration of this rod constant?
- Prabs3257
- · Replies 11 ·
Electric Potential at A and B: Find the Answer
- moeug1999
- · Replies 3 ·
Coulomb's Law: Solving Problems with Electric Charges
- moeug1999
- · Replies 5 ·
How do I solve this equation my professor gave me?
- moeug1999
- · Replies 1 ·
Plano-convex lens with phase changes
- jisbon
- · Replies 22 ·
How intensity and amplitude depends from a distance r
- AndreAo
- · Replies 2 ·
Working out the current flow in a wire
- Bolter
- · Replies 8 ·
Young's experiment - lowering the light intensity of one slit
- Eitan Levy
- · Replies 5 ·
Solving Cross Section Confusion: Adding Positive and Negative Ions
- arrozito
- · Replies 1 ·
Minimum frequency for a point to have maximum amplitude in standing wave
- Eitan Levy
- · Replies 5 ·
How Does Momentum and Energy Conservation Apply to a Tarzan Swing Collision?
- bieon
- · Replies 46 ·
Charge enclosed within different radii in a diagram
- jisbon
- · Replies 1 ·
Circular motion when magnetic force points into the page
- jisbon
- · Replies 2 ·
Finding distance between Earth and Moon in gravitational fields
- Bolter
- · Replies 5 ·
Kinematics - finding the time when two moving objects meet
- yurono
- · Replies 9 ·
Ampere's law -- application with two conducting loops
- Physicslearner500039
- · Replies 1 ·
Thermal expansion (surface area)
- jisbon
- · Replies 1 ·
Speed of sound in an ideal gas
- greg_rack
- · Replies 6 ·
Kinetic energy and momentum in circular paths
- Like Tony Stark
- · Replies 4 ·
[SR] - Test Particle inside the Sun's Gravitational Field - Part 4
- Athenian
- · Replies 9 ·
Initial velocity given time and angle
- LR5
- · Replies 8 ·
Energy band gap when there is an electric field
- jisbon
- · Replies 1 ·
Spring force question with a mass suspended on a spring
- Amik
- · Replies 15 ·
How to Determine the Final Velocity of an Iron Block?
- volcore
- · Replies 3 ·
Weight of water with objects floating
- brotherbobby
- · Replies 13 ·
When do I include the Earth's radius in questions involving satellites?
- checkerboard
- · Replies 5 ·
Mechanics problem — Car moving with constant acceleration
- Vortex8380
- · Replies 8 ·
Finding magnetic field from triangular current distribution using Ampere's law
- Physicslearner500039
- · Replies 6 ·
Sound reflection from wall with absorption loss
- classicswiss
- · Replies 1 ·
[SR] - Test Particle inside the Sun's Gravitational Field - Part 2
- Athenian
- · Replies 12 ·
Are planar wavefronts spatially and temporally coherent?
- Navid
- · Replies 3 ·
[SR] - Test Particle inside the Sun's Gravitational Field - Part 3
- Athenian
- · Replies 16 ·
How Do Symmetrical Charges Affect Net Electric Field in a Circle?
- jisbon
- · Replies 5 ·
Is the tuba an open or closed pipe?
- songoku
- · Replies 8 ·
Finding charge q2 from net force on particle 2 as particle 3 moves along x axis
- lydia_y620
- · Replies 5 ·
What is the change in entropy of the water in a reversible heat engine?
- Pouyan
- · Replies 4 ·
Calculation involving the reactance of a combination
- etotheipi
- · Replies 1 ·
Number of photons emitted by a laser
- songoku
- · Replies 4 ·
Wavelength used in double slit experiment
- songoku
- · Replies 4 ·
Correct statement regarding the load vs length graph of a rubber band
- songoku
- · Replies 2 ·
How can I calculate the tension force?
- elleo
- · Replies 5 ·
How to determine the angles using geometry (specific example)
- bolzano95
- · Replies 10 ·
How Does the Relativistic Rocket Equation Describe Velocity?
- shinobi20
- · Replies 2 ·
Working out the current and voltage in a circuit
- Bolter
- · Replies 33 ·
Why is the reaction force inclined on a smooth surface but perpendicular at corners?
- Like Tony Stark
- · Replies 3 ·
Charged proton enters an electric field
- physicsundergrad123
- · Replies 2 ·