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 efficiency of the aircraft engines in this scenario?
- endeavor
- · Replies 4 ·
Calculating Electrostatic Force on a Particle with Coulomb's Law
- Punchlinegirl
- · Replies 2 ·
Acceleration of a 40-kg cement block pulled with 200N
- kitkat
- · Replies 6 ·
How is the Catenary Equation Derived?
- amcavoy
- · Replies 3 ·
Moments: rotational and translational velocity
- wrburns
- · Replies 4 ·
MLtT and FLtT dimensions chart for physical quantities and units
- JSBeckton
- · Replies 1 ·
Solid disc rolling down a variable incline
- Quadrophenia
- · Replies 16 ·
How Does the Radius of Gyration Affect Acceleration on an Incline?
- doner
- · Replies 4 ·
Moment of inertia of a 0.44 kg meter stick rotating about the 30 cm mark
- PhysicsDud
- · Replies 10 ·
Solving Kinematics Problems: Maximum Height, Time, and Velocity Calculations
- BigCountry
- · Replies 3 ·
Rolling sphere down incline without slipping: does mass cancel out?
- hoseA
- · Replies 7 ·
Net electrostatic force : four particles form a square
- feistytigger
- · Replies 3 ·
Deriving kinetic energy equation Ek=1/2mv^2
- skull
- · Replies 8 ·
How Fast Can a Car Travel on a 22° Icy Banked Curve with a 170m Radius?
- Xylitol
- · Replies 8 ·
Initial and Final Thermal Energies of a Gas
- G01
- · Replies 8 ·
Gravitational Force elevator questions
- sweet877
- · Replies 4 ·
More constant acceleration questions
- kylera
- · Replies 1 ·
Calculating Impulse Using FΔt: A 4.0-N to 15 N Challenge
- metalmagik
- · Replies 2 ·
What Are Good Resources for Learning About CE Transistor Amplifiers?
- catalyst55
- · Replies 1 ·
How to Calculate the Tension in a Cable Supporting a Lever Rod?
- hoseA
- · Replies 6 ·
Rolling disk up a 30° incline with rotational energy
- hoseA
- · Replies 2 ·
Angular Velocity Calculations for Rotating Wheel
- PhysicsDud
- · Replies 7 ·
Find Angle of Vector h: 3ax+5ay-8az
- zekester
- · Replies 2 ·
What Are the Units of Constant C in a Force Equation?
- skull
- · Replies 25 ·
Finding Resultant Resistance of Electrical Circuit - Gamma
- Gamma
- · Replies 7 ·
Motion of 2 charged particles in a constant electric field
- an_mui
- · Replies 9 ·
Calculating Moment of Inertia of a Hollow Cylinder + Solid Mass
- kendro
- · Replies 2 ·
Why is entropy directly proportional to temperature if S = dq/T?
- vaishakh
- · Replies 3 ·
Understanding Ultimate Ratio of Equality
- adiputra
- · Replies 1 ·
How would you calculate the work done
- stunner5000pt
- · Replies 5 ·
Calculating KE of a 900kg Car Moving at 20m/s
- As-student
- · Replies 1 ·
Does Wave Speed Indicate Medium Density?
- StaticShock
- · Replies 1 ·
Is more work required for this spring?
- endeavor
- · Replies 5 ·
Angular Momentum of an asteroid
- lightfire22000
- · Replies 12 ·
Calculating Minimum Diameter for Iron Bolt to Withstand Shear Forces
- pnl0628
- · Replies 2 ·
Gravitational Forces and Torque Reviews
- python023
- · Replies 4 ·
Finding mass and stretch from spring frequency and spring constant
- StaticShock
- · Replies 6 ·
Work done by a father pushing a sled up a hill
- endeavor
- · Replies 2 ·
Two identical singe waves 90 degrees out of phase
- IcedB
- · Replies 1 ·
Can steam heat a saturated salt solution above 100°C?
- Diniz Noronha
- · Replies 8 ·
Conversion Factors: Easily Find Unit Conversions
- kgbwolf
- · Replies 5 ·
Questions in regards to momentum
- angel_romano
- · Replies 1 ·
In terms of impulse and momentum
- angel_romano
- · Replies 1 ·
Temperature Change Conversion: F, C, K
- RadiationX
- · Replies 2 ·
How high is the bridge above the water?
- kgbwolf
- · Replies 13 ·
Calculating Static Equilibrium for Ladder Climb
- PhysicsDud
- · Replies 4 ·
Light refraction in water and total internal reflection in a prism
- hshphyss
- · Replies 5 ·
Does greater index of refraction cause more or less bending?
- oooo
- · Replies 2 ·
Electric Potential of a Spherical Shell of Charge
- Polarbear
- · Replies 3 ·
Is friction independent from area of contact?
- shaan_aragorn
- · Replies 5 ·
Vehicle speed given time difference for one mile
- caseys
- · Replies 3 ·
How Much Energy Results from Reacting 2.0kg of Hydrogen with 38kg of Fluorine?
- Koyuki
- · Replies 1 ·
How is "cross sectional area" different from "area"?
- untitledm9
- · Replies 5 ·
Contact force in an ideal situation
- TheDonk
- · Replies 4 ·
Two Problems About Osscilations
- G01
- · Replies 7 ·
Solving a Frictional Problem with No Given Masses
- python023
- · Replies 3 ·
Calculating Current for Electromagnet Lift
- 29 clicks
- · Replies 3 ·
Static Charge on people and in general
- danyal711
- · Replies 1 ·
Car accelerating from 70 to 110 km/h in 5 seconds
- BigCountry
- · Replies 6 ·
Solving 700N + 98N Weight Distribution Problem
- BoogieL80
- · Replies 1 ·
Exercesie about force with friction
- Rukawa0320
- · Replies 2 ·
Thermal + Compressive Stress in a Rod + Spring system
- maverick280857
- · Replies 4 ·
Why do light nuclei fuse while heavy nuclei split?
- frozen7
- · Replies 2 ·
Roof tile falling past a window in 0.20s
- nofear001
- · Replies 7 ·
Can a Roller Coaster's Loop Height Affect the Force on the Track?
- hoseA
- · Replies 5 ·
Calculate Magnitude of 2nd Force on 2.7 kg Mass - Answer in N
- hoseA
- · Replies 11 ·
Car Speed: Find the Answer Here
- mathman100
- · Replies 10 ·
How to Calculate Distance Traveled on a Slope with Kinetic Friction
- hoseA
- · Replies 2 ·
Free-fall question with extras
- kylera
- · Replies 4 ·
Finding indices of refraction from wavelengths in a prism
- oooo
- · Replies 1 ·
Landing and abort distances for aircraft with friction braking
- International87
- · Replies 5 ·
Finding the Effective Spring Constant for Joined Springs
- apchemstudent
- · Replies 6 ·
Calculating Airborne Distance on a Hemispherical Hill
- SABander
- · Replies 4 ·
Air drag force on moving object with wind
- haki
- · Replies 1 ·
Calculating moment of inertia of a system of balls
- haki
- · Replies 4 ·
What are the three types of energy involved in an oscillating spring problem?
- apchemstudent
- · Replies 2 ·
Power, Force, Velocity and Acceration
- Harmony
- · Replies 1 ·
Oscillation of object on spring - Find speed
- apchemstudent
- · Replies 1 ·
Motion problem with constant velocity then deceleration
- TrionHost
- · Replies 22 ·
Frequency of Oscillations of Two Joined Springs and Block of Mass 0.245 kg
- apchemstudent
- · Replies 2 ·
Total resistance of 3 parallel resistive heating strips at 12V
- goan
- · Replies 5 ·
Torque on a see-saw type object
- Captain Zappo
- · Replies 1 ·
Hoop rolling up a ramp and bucket lifted by a crank
- ryomaechizen
- · Replies 7 ·
Egg scrambler device powered by falling mass over 8-12 meters
- KbCs2006
- · Replies 6 ·
Can a Time Machine Reverse the Universe Instead of Time?
- runicle
- · Replies 17 ·
Understanding Ohm's Law and the Relationship between Resistance and Current
- runicle
- · Replies 4 ·
Calculating Charge and Force of Attraction for Two Charged Coins on a Lab Table
- Blink691
- · Replies 2 ·
Finding velocity and position for a spring with F = -6x
- PrudensOptimus
- · Replies 8 ·
Newton's second law and D'Alembert's principle
- jrm2002
- · Replies 12 ·
Average Velocity of Particle in Solution at RTP
- PhiJ
- · Replies 9 ·
When Does the Nonlinear Stress-Strain Equation Apply?
- tandoorichicken
- · Replies 4 ·
Magnitude and direction of the resultant force
- Klutch
- · Replies 2 ·
Internal energy decreases 500 J with 220 J work on system
- robobot4
- · Replies 9 ·
Approaching Simple Harmonic Motion Amplitude Calculation
- sopi
- · Replies 1 ·
Design egg transport device powered by falling mass for 8-12 meter track
- KbCs2006
- · Replies 2 ·
Why is ionization energy exactly 10.4 eV if ground state is -10.4 eV?
- m00c0w
- · Replies 2 ·
Pulse power of a flashlamp-pumped Nd:YAG laser
- T7
- · Replies 3 ·