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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Calculus 2 - Center of Mass and Pappus Centroid Theorem
- Sune Irl
- · Replies 1 ·
Problem using vectors and relative motion
- Hema
- · Replies 12 ·
Expectation value of raising and lower operator
- renec112
- · Replies 7 ·
Why are transformers important to electric power distribution
- joyxx
- · Replies 7 ·
3 balls rolling down different-shaped inclined platforms
- jaguar___
- · Replies 8 ·
Calculations based on Neutrons in a Gravitational field
- TanX
- · Replies 5 ·
How do I calculate the work done in a kinetic theory problem?
- Clara Chung
- · Replies 4 ·
Thermal stress elastic energy calculation with wrong answer
- Clara Chung
- · Replies 2 ·
Relativistic mass/length contraction problem
- chef99
- · Replies 3 ·
Induction: Electromagnet and Aluminium Ring
- Numbergeek99
- · Replies 1 ·
Why is the control volume friction force negative?
- Kqwert
- · Replies 13 ·
Finding the weight of Nitrogen in Air
- thevinciz
- · Replies 3 ·
What is the pressure at the tap due to Darcy losses?
- physea
- · Replies 8 ·
Free fall and slide, gained speed?
- jaguar___
- · Replies 3 ·
When does gas do more work: constant pressure or temperature?
- Sudikshya Pant
- · Replies 2 ·
2 Polarizers attenuating a light beam
- stefan3423
- · Replies 11 ·
Three equal charges held by equal length strings
- mr_sparxx
- · Replies 11 ·
Ambiguity in finding errors using natural logarithm method
- AdrianMachin
- · Replies 5 ·
Proof of oscillation about the equilibrium
- Bonnie
- · Replies 6 ·
Find the initial current in the circuit (at t=0)
- Fatima Hasan
- · Replies 5 ·
Mean momentum of a nucleon as a function of mass number A
- nunuhoyv
- · Replies 3 ·
Finding angular velocity using conservation of energy
- Coderhk
- · Replies 13 ·
Heat transfer boundary condition
- EastWindBreaks
- · Replies 5 ·
Plane Mirror - Distance to Focus for Clear Selfie
- Jess_18033152
- · Replies 7 ·
Sanity check on falling steel ball in water
- Sherwood Botsford
- · Replies 5 ·
What is the Correct Way to Calculate Emissivity and Absorptivity?
- Kqwert
- · Replies 8 ·
How Many Atoms to Draw in an FCC Lattice Problem?
- Clara Chung
- · Replies 4 ·
Voltage, Current, and Resistance Calculations
- a1234
- · Replies 13 ·
Induced Current Problem from the professor not in our textbook
- stevencarlover
- · Replies 2 ·
Finding equilibrium of forces in a system with unknown angles
- thevinciz
- · Replies 46 ·
Black Body vs Non-Black Body: What Sets Them Apart in Kirchoff's Law?
- Kqwert
- · Replies 3 ·
Maxwell equation with mismatched partial derivative subscripts
- Clara Chung
- · Replies 4 ·
Combining 25, 100, and 50 ohm resistors to get 62.5 ohms
- a1234
- · Replies 9 ·
What is the minimum charge needed for a ball to jump in an electric field?
- Jorgen1224
- · Replies 15 ·
Calculating Velocity of Water Flow in Open Channel
- Kqwert
- · Replies 11 ·
Block floating in between oil and water, what's the FBD?
- danjordan
- · Replies 21 ·
How do I find the volume of gas using the given mass of oxygen?
- thevinciz
- · Replies 10 ·
Efficiency in a thermodynamic cycle
- Alexandre Ricardo
- · Replies 3 ·
Finding Wave Speed: A Boy Fishing on the Jetty
- Sullo
- · Replies 1 ·
Acceleration of a cart immediately after the system is released
- randomgamernerd
- · Replies 15 ·
Calculating Measurement Error for a Digital Lux Meter
- AltruisticVariation
- · Replies 8 ·
What is the maximum value of the current through the inductor?
- randomgamernerd
- · Replies 34 ·
System of equilibrium, why won't the normal force apply?
- SmamMir
- · Replies 10 ·
An analytic expression to describe spherical aberration
- Nabin kalauni
- · Replies 2 ·
How to Calculate Entropy and Enthalpy in a Thermodynamics Problem
- Clara Chung
- · Replies 4 ·
Boundary condition of pinned/fixed/roller support
- yecko
- · Replies 4 ·
The relationship between initial and final current density
- Fatima Hasan
- · Replies 5 ·
Statics problem -- Rectangular plate lying on two inclined surfaces
- Mzaa
- · Replies 3 ·
What is the Relationship Between Voltage and Capacitors in a Series Circuit?
- kd2amc
- · Replies 4 ·
Why is the current through I2 constant?
- kd2amc
- · Replies 4 ·
What is the formula for converting decibels to a power ratio?
- AgustRunarsson
- · Replies 1 ·
Calculating Image Distance Using a Christmas Tree Ball
- Jess_18033152
- · Replies 2 ·
Find the charge on the capacitor and the currents
- Fatima Hasan
- · Replies 2 ·
Find the resistivity of the resistive wire
- Fatima Hasan
- · Replies 1 ·
Calculating Final Velocity on a Ramp
- MPQC
- · Replies 5 ·
What is the solution to question 2 on energy conservation problems homework?
- Mzaa
- · Replies 2 ·
Find the phase difference (in radians)
- CalinDeZwart
- · Replies 8 ·
Finding R(t) in discharging RC circuit
- ddobre
- · Replies 4 ·
Inertial and Gravitational mass - Assertion Reason
- Jahnavi
- · Replies 14 ·
Find the change in the Kinetic energy of an Ideal Gas
- Helly123
- · Replies 39 ·
Find the radius of the circle for this airplane
- isukatphysics69
- · Replies 9 ·
Fleming's left and right hand rule - how do they work?
- Daniel2244
- · Replies 8 ·
How to Determine the EMF of a Battery Using Two Voltmeters?
- palkia
- · Replies 7 ·
Calculating current with and without internal resistance
- ddobre
- · Replies 6 ·
Time Dilation for Moving Rectangle with Clocks at its Corner
- GL_Black_Hole
- · Replies 4 ·
D’Alembert Vs Conservation of Energy
- GrimUpNorth
- · Replies 3 ·
Is the Law of Areas Still Applicable with a Changed Law of Gravitation?
- Jahnavi
- · Replies 10 ·
Current flowing in the middle branch -- Why 2 different answers?
- Jahnavi
- · Replies 10 ·
Does Time Dilation Affect Synchronized Clocks in Different Frames?
- chef99
- · Replies 10 ·
Find the time constant of the circuit
- Fatima Hasan
- · Replies 1 ·
Find the new resistance if its length and D are doubled
- Fatima Hasan
- · Replies 5 ·
Copper rod between hydrogen and thermal radiation at equilibrium
- Sudikshya Pant
- · Replies 5 ·
Paschen back effect and commutator [J^2,Lz]
- Taylor_1989
- · Replies 1 ·
The time needed for Q to reach 20% of its final value
- Fatima Hasan
- · Replies 8 ·
Calculating current in five resistor/two battery circuit
- ddobre
- · Replies 4 ·
AC production production -- I need to describe how it works
- Daniel2244
- · Replies 5 ·
Pressure on a vertical rectangular plate submerged in water
- Kqwert
- · Replies 15 ·
Change in molar entropy of steam
- says
- · Replies 17 ·
Satellite fall and friction force problem
- Sergio Rodriguez
- · Replies 11 ·
What is the tension in the tether of a bomb tethered to the ocean floor?
- mailmas
- · Replies 5 ·
Will a Sealed Steel Container Float in the Ocean?
- mailmas
- · Replies 12 ·
How Is the Distance to the Seabed Calculated Using Sonar?
- Jess_18033152
- · Replies 4 ·
Torque Rigid Beam: Find Force Applied by Support 2
- mailmas
- · Replies 4 ·
Frames of Reference and Time Dilation
- chef99
- · Replies 2 ·
Dimensional consistency problem,
- llstanfield
- · Replies 7 ·
Find the charge on the positive circular plate
- Fatima Hasan
- · Replies 1 ·
How Does a Force Affect Spring Length Between Two Equal Mass Blocks?
- Jorgen1224
- · Replies 2 ·
What is the terminal voltage Vab in this circuit?
- Fatima Hasan
- · Replies 3 ·
How do you find the uncertainty of an average?
- Student2018
- · Replies 2 ·
Enthalpy and internal energy relations with Cp and Cv
- cooldudeachyut
- · Replies 4 ·
X-ray diffraction and Bragg's law
- Martin89
- · Replies 5 ·
Image position with glass slab near a concave mirror
- Suraj M
- · Replies 19 ·
Moon-Earth gravitation: finding radius as a function of time
- isukatphysics69
- · Replies 73 ·
Time for radio signal to get to a receiver
- Jess_18033152
- · Replies 2 ·
Using Maxwell-Boltzman Statistics
- says
- · Replies 4 ·
Unfingered Guitar String Vibration Frequency: 627 Hz
- Kevin Kim
- · Replies 3 ·
Calculating frequency of the second harmonic
- struggtofunc
- · Replies 2 ·
Where is the hinge point? & what is the moment of inertia of a square?
- randomgamernerd
- · Replies 5 ·
If induced emf increases linearly with time, what is B proportional to?
- appliedF
- · Replies 8 ·
Does angular momentum remain zero when a skater hops onto a sliding board?
- The Head
- · Replies 11 ·