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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Finding parallel or in-series resistors
- Ineedhelpwithphysics
- · Replies 3 ·
Does heating coffee or compressing a spring increase mass?
- Abivarman
- · Replies 7 ·
Momentum: instantaneous or average?
- paulb203
- · Replies 9 ·
Derivation process of Selection Rule of hydrogenic atom
- smjchris
- · Replies 1 ·
Finding a vector perpendicular to a given vector
- student120
- · Replies 2 ·
Trouble understanding frames in relativity
- approximatelysphere
- · Replies 4 ·
Why does the PE of particles during steam condensation decrease?
- shirozack
- · Replies 14 ·
Torque on a sign hung by a hinge
- Physical_Fire
- · Replies 3 ·
Acceleration of a ball at its max height after being thrown upwards
- shirozack
- · Replies 11 ·
Oscillation of fluids in a U tube
- Rob2024
- · Replies 17 ·
A microwave oven of mass 13.0kg is pushed a distance 8.80m up a ramp
- nouvelague
- · Replies 2 ·
Free-body diagram: Spring-loaded cylinder sliding on a metal rod
- ymnoklan
- · Replies 34 ·
A 2.8-kg block slides over the smooth icy hill -- Find the minimum speed to clear the pit
- nouvelague
- · Replies 1 ·
A household fridge removes heat, determine power the fridge draws
- joejoe121
- · Replies 8 ·
Find h in the problem involving a stone thrown upwards
- chwala
- · Replies 5 ·
Voltage-resistance graph for this circuit with a variable resistance
- shirozack
- · Replies 4 ·
Work done by a balloon that is rising
- shirozack
- · Replies 8 ·
Coefficient of friction of a sandwiched body
- vamsi
- · Replies 15 ·
Ball with 0.5 m/s² acceleration: does it make sense to say time up equals time down?
- shirozack
- · Replies 7 ·
Efficiency of Stirling Cycle - Is it the same as the Carnot Engine?
- laser1
- · Replies 14 ·
Circular motion and moment of inertia - circle loop
- CRJ
- · Replies 29 ·
Pressure question: Weight of a car calculated from tyre contact patch area
- shirozack
- · Replies 3 ·
Ionic thruster high school science project
- lucashuizat777
- · Replies 2 ·
Rolling without Slipping Demo
- erobz
- · Replies 8 ·
RCL series circuit analysis: Damping Constant
- hoangpham4696
- · Replies 1 ·
Electric field of a charged disc with a small circle cut out of it
- kirito
- · Replies 9 ·
Block tied to a fixed string on an accelerating wedge
- Null_Void
- · Replies 37 ·
Use of imaginary charge vs Gauss' law
- kirito
- · Replies 12 ·
Relation between the velocity vector and the acceleration vector of an object
- Clockclocle
- · Replies 1 ·
Issue deriving the third law of thermodynamics
- laser1
- · Replies 11 ·
First Law of Thermo: Audience body heat warming a concert hall
- Mineral
- · Replies 25 ·
Rotational Dynamics problem with instantaneous frame of reference
- YK0001
- · Replies 6 ·
Distribution of Energy when work is done on a system of 2 masses connected by a spring
- MattGeo
- · Replies 17 ·
What Does -∂V/∂x Represent in Newton's Law?
- rb120134
- · Replies 2 ·
Two cars with different starting positions using SUVAT equations
- Physical_Fire
- · Replies 8 ·
Why kinematic equations have (1/2)at² instead of at²
- John3509
- · Replies 20 ·
What is the relationship between tire size and pressure changes?
- songoku
- · Replies 13 ·
Moment of Inertia of Solid Sphere - Proof
- Math_Maniac
- · Replies 3 ·
Reading of Ammeter for this circuit with Voltage Controlled Resistors
- Bling Fizikst
- · Replies 9 ·
Relation between Friction, Velocity, and Acceleration
- steff-23
- · Replies 16 ·
Time derivative of a rotating vector with different delta t signs
- Clockclocle
- · Replies 4 ·
Entropy Change For Van Der Waals Gas
- laser1
- · Replies 5 ·
Maximum Power dissipated at load resistor
- Bling Fizikst
- · Replies 3 ·
How does Poiseuille's law relate to friction force?
- notorious
- · Replies 5 ·
Reversible, adiabatic expansion - Entropy Change
- laser1
- · Replies 5 ·
Linear momentum but quadratic kinetic energy?
- Rick28
- · Replies 4 ·
Are there two downward forces acting on the pivot of the rotating rod?
- ymnoklan
- · Replies 67 ·
Thermodynamics: Violating Clausius => Violating Kelvin
- laser1
- · Replies 10 ·
The motion of a skateboarder along and above a ramp
- StrugglingStudent123
- · Replies 2 ·
Deriving the particle's motion using numerical integration
- theblazierbroom
- · Replies 5 ·
Circular motion, coin on a rotating disk
- fallingforfandoms
- · Replies 2 ·
Angular velocity- A toy train rolls around a horizontal track
- Ediscoverlyf
- · Replies 8 ·
Energy stored in the steady state circuit
- hoangpham4696
- · Replies 7 ·
Finding initial velocity and height when binoculars reach max height
- DeltaForce
- · Replies 7 ·
Additivity of thermodynamic potentials?
- heyhey281
- · Replies 1 ·
Two Forces Acting Simultaneously
- BurpHa
- · Replies 6 ·
Electric field of a finite linear distribution of charge
- darioslc
- · Replies 18 ·
Conversion factor when converting from SI to natural units
- Dex_
- · Replies 1 ·
How do I calculate forces in a truss cross section?
- carlcla
- · Replies 2 ·
Clausius' Theorem and Entropy
- laser1
- · Replies 8 ·
Circular argument? Justification of equipotential points
- tellmesomething
- · Replies 16 ·
Is My Calculation of Work Along a Defined Curve Correct?
- Morle
- · Replies 4 ·
Thermodynamics of a Heat Engine - (First/Second Law)
- laser1
- · Replies 2 ·
Finding the distance of a peg so that a pendulum can circle around it
- SelzerRS
- · Replies 2 ·
Energy of springs connected in series and parallel
- songoku
- · Replies 13 ·
The specific work done on an ideal gas during an adiabatic process in a piston-cylinder system
- joejoe121
- · Replies 13 ·
Relative electrical energy consumption for different light bulb color temperatures
- songoku
- · Replies 3 ·
Why apply Doppler effect twice for reflected light in special relativity
- mancity
- · Replies 1 ·
Confusion about work done by a gas - Thermodynamics
- laser1
- · Replies 15 ·
Thermal exchange between warm object and ideal gas
- JayBi
- · Replies 2 ·
Thermodynamics: Two gases in a container
- heyhey281
- · Replies 1 ·
Show that the radius of the exoplanet is about 1/2 of Earth’s radius
- hraghav
- · Replies 2 ·
Total Energy vs Average Energy (Thermo)
- laser1
- · Replies 11 ·
Electric flux from line charge through plane strip
- Natique
- · Replies 7 ·
Investigation into electric guitar pickups
- singismund
- · Replies 4 ·
Electric field created by point charges
- darioslc
- · Replies 6 ·
Confusion about applying Faraday's law to a circuit
- eyeweyew
- · Replies 3 ·
What's the energy stored in a parallel plate capacitor?
- NTesla
- · Replies 14 ·
Mass Pulley and torque -- Confusion in this Atwood machine problem
- mancity
- · Replies 11 ·
Derive Gravitational Force and Field between two identical rods
- RIJU101
- · Replies 1 ·
A particle slides down a non-fixed hemisphere
- Jason Ko
- · Replies 3 ·
Two spring-coupled masses in an electric field (one of the masses is charged)
- kekpillangok
- · Replies 1 ·
Find the equivalent resistance of this circuit
- zenterix
- · Replies 31 ·
How Do I Draw a Decay Scheme in Radiochemistry?
- Kacey679
- · Replies 1 ·
Determine the type of measurement by classification
- Miristeri
- · Replies 2 ·
Rope tension problem: Mass hanging from a rope tied at an angle
- litelboi
- · Replies 21 ·
Potential in spherical shells
- per persson
- · Replies 2 ·
Internal Resistance Affect the Balancing Length in a Potentiometer?
- tellmesomething
- · Replies 12 ·
Robot starts to overturn when reaching to pick up a load
- crystallizedyogurt
- · Replies 2 ·
Distance rolled of sphere vs cylinder with same m, r, and v
- I_Try_Math
- · Replies 5 ·
Determine energy required to stop rolling mass
- I_Try_Math
- · Replies 10 ·
Required force for sphere start rolling
- eyeweyew
- · Replies 2 ·
Applying conservation of string to a pulley system
- mancity
- · Replies 5 ·
Finding the reflected wave amplitude at a string junction
- Ark236
- · Replies 8 ·
Tension in a rope hanging between 2 trees
- Manish_529
- · Replies 24 ·
How do I calculate the Tension in a rope going over a smooth pulley?
- carlcla
- · Replies 19 ·
Liquid rocket engine excercise
- mirko9670
- · Replies 1 ·
Connecting a number of EMF sources in a circle to form a circuit
- tellmesomething
- · Replies 9 ·
Friction force on a ball falling through a body of water
- NikolasLund
- · Replies 9 ·
Is the Trigonometric Analysis of Conveyor Belt Forces Correct?
- Aariz
- · Replies 6 ·