Introductory Physics Homework Help Forum

Post thread
Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
How Does Cooling Bricks Affect the Entropy Change of the Universe?
  • · Replies 20 ·
Replies
20
Views
3K
Centripetal Force of swung keys Problem
  • · Replies 5 ·
Replies
5
Views
2K
What is the direction of rolling friction?
  • · Replies 2 ·
Replies
2
Views
3K
How to control velocity in a conical pendulum
  • · Replies 1 ·
Replies
1
Views
1K
Velocity of a planet around the sun
  • · Replies 4 ·
Replies
4
Views
2K
Hooke's Law: Find x (How much will the spring stretch)?
  • · Replies 8 ·
Replies
8
Views
3K
Tangental Velocity and Bicycle Wheel Radii
  • · Replies 2 ·
Replies
2
Views
5K
Find the equivalent resistance (Req) of the simple circuit.
  • · Replies 4 ·
Replies
4
Views
4K
How do I determine the resultant vector R from R = A + B ?
  • · Replies 13 ·
Replies
13
Views
9K
Moment of Inertia for Composite Object
  • · Replies 4 ·
Replies
4
Views
1K
C is incorrect. Work and Friction: A, B, & D True
  • · Replies 4 ·
Replies
4
Views
2K
Power Problem regarding elavator
  • · Replies 3 ·
Replies
3
Views
790
Magnetic field produced by a current
  • · Replies 8 ·
Replies
8
Views
1K
Electrostatic Field and Particle Motion: Homework Solution and Explanation
  • · Replies 1 ·
Replies
1
Views
1K
Work, Force, Energy and power question about moving car.
  • · Replies 7 ·
Replies
7
Views
3K
Net flux through a cylinder from a point charge
  • · Replies 1 ·
Replies
1
Views
3K
What are the tensions on two cables holding a girder hanging from a crane?
  • · Replies 14 ·
Replies
14
Views
3K
How to Obtain a Magnification of -2 from a Convex Lens?
  • · Replies 3 ·
Replies
3
Views
3K
An electron moving through a uniform magnetic field
  • · Replies 7 ·
Replies
7
Views
11K
Confusion regarding signs in SHM problem
  • · Replies 15 ·
Replies
15
Views
3K
Solving Simple Work Problem: 515J
  • · Replies 1 ·
Replies
1
Views
1K
Introductory problem about force (N)
  • · Replies 3 ·
Replies
3
Views
10K
Hydrostatics on plane surface (basic fluid mechanic Q)
  • · Replies 1 ·
Replies
1
Views
2K
Astronomy: Sun azimuth from altitude, hour angle, and declination
  • · Replies 3 ·
Replies
3
Views
3K
Statistical Physics: Cubic lattice of two molecules
  • · Replies 1 ·
Replies
1
Views
1K
Angular motion-centrifuge problem .
  • · Replies 3 ·
Replies
3
Views
2K
Calculating Kinetic Energy of a Rotating Grinding Wheel
  • · Replies 13 ·
Replies
13
Views
2K
Why Are There Different Results in Young's Double-Slit Experiment Calculations?
  • · Replies 1 ·
Replies
1
Views
2K
Effusion in Uranium Enrichment: Calculating Concentration and Number of Repeats
  • · Replies 12 ·
Replies
12
Views
2K
A homemade capacitor question, Vf/2
  • · Replies 1 ·
Replies
1
Views
1K
A 3500-pF air-gap capacitor question
  • · Replies 2 ·
Replies
2
Views
4K
Mechanical advantage ideal systems
  • · Replies 2 ·
Replies
2
Views
2K
What is the normal force on a block at the top of a loop?
  • · Replies 3 ·
Replies
3
Views
3K
Finding Magnitude Homework: Inequality for Moving Blocks Together
  • · Replies 2 ·
Replies
2
Views
1K
Circuit analysis complex numbers
  • · Replies 2 ·
Replies
2
Views
1K
Conservation of Energy for Parallel Wires
  • · Replies 3 ·
Replies
3
Views
1K
Ping-Pong Ball Submerged in Water and then Released
  • · Replies 12 ·
Replies
12
Views
8K
De Broglie wavelength of nitrogen molecules
  • · Replies 3 ·
Replies
3
Views
6K
Equations for total internal reflection
  • · Replies 9 ·
Replies
9
Views
3K
Find the magnitudes of all of the forces acting on the sled
  • · Replies 5 ·
Replies
5
Views
2K
Electron revolutions in Bohr model
  • · Replies 6 ·
Replies
6
Views
6K
My temperature after dropping ice in tea isn't adding up
  • · Replies 14 ·
Replies
14
Views
2K
How Do You Calculate Tension and Acceleration in a Constrained Pulley System?
  • · Replies 4 ·
Replies
4
Views
1K
Astronomy: Speed at the edge of the galaxy
  • · Replies 4 ·
Replies
4
Views
1K
Flux of Circuit made from Metal Bar on Parallel Rails
  • · Replies 4 ·
Replies
4
Views
2K
Using force vector to integrate work in xy-plane
  • · Replies 8 ·
Replies
8
Views
3K
Calculate the magnitude of the induced EMF in the loop
  • · Replies 1 ·
Replies
1
Views
6K
Find angle required for total internal reflection of a beam of light
  • · Replies 4 ·
Replies
4
Views
8K
Average Dose Rate of 1.11x108 Bq 131I in Thyroid
  • · Replies 1 ·
Replies
1
Views
2K
Thermodynamics: finding work done
  • · Replies 4 ·
Replies
4
Views
1K
How do I find the specific heat of a hot object in water?
  • · Replies 14 ·
Replies
14
Views
3K
Frequency difference to find a 20m whale
  • · Replies 1 ·
Replies
1
Views
1K
One dimensional Kinematics help
  • · Replies 5 ·
Replies
5
Views
3K
How much the gas has increased the speed of the plug?
  • · Replies 7 ·
Replies
7
Views
1K
Thomson and Rutherford's experiments
  • · Replies 3 ·
Replies
3
Views
3K
Time it takes for electron to travel through a solenoid.
  • · Replies 7 ·
Replies
7
Views
3K
Plotting Kinetic Energy of Mass Against Time and Distance
  • · Replies 31 ·
2
Replies
31
Views
43K
Procedure for an Inclined Plane Lab
  • · Replies 3 ·
Replies
3
Views
3K
Conservation of momentum question - elastic collisions
  • · Replies 6 ·
Replies
6
Views
5K
How Are Proton Energies Quantized in a Nano-Scale Box?
  • · Replies 1 ·
Replies
1
Views
4K
Scale Reading in Elevator: Mass, Acceleration, and Velocity Calculations
  • · Replies 6 ·
Replies
6
Views
3K
Question about work, energy and the work energy theorem.
  • · Replies 4 ·
Replies
4
Views
2K
How to know when to relate the tangents (Divide components)
  • · Replies 4 ·
Replies
4
Views
1K
How Does Energy Transfer Affect Entropy in a Water-Ice System?
  • · Replies 3 ·
Replies
3
Views
2K
How can the momentum of a thrown rock be calculated with given parameters?
  • · Replies 1 ·
Replies
1
Views
1K
Calculating Torque around moving Centre of mass
  • · Replies 3 ·
Replies
3
Views
3K
Calculating Volume Charge Density: Simplified Earth Model
  • · Replies 2 ·
Replies
2
Views
2K
How Is Heat Calculated in a Diesel Cycle Using Volumes and Temperatures?
  • · Replies 4 ·
Replies
4
Views
2K
Equilibrium Question with water and ice
  • · Replies 6 ·
Replies
6
Views
2K
Rutherford scattering - electromagnetic form factor
  • · Replies 3 ·
Replies
3
Views
1K
Spring mass pulley system frequency equation
  • · Replies 7 ·
Replies
7
Views
15K
Energy of a Forced, Damped Oscilator
  • · Replies 6 ·
Replies
6
Views
2K
Rotational motion - finding tangential acceleration
  • · Replies 1 ·
Replies
1
Views
2K
Tank of pressurized air to loosen bolts
  • · Replies 5 ·
Replies
5
Views
2K
Eq. for displacement of current-carrying wire due to magnet
  • · Replies 2 ·
Replies
2
Views
5K
Electric charge inside a uniformly distributed sphere
  • · Replies 5 ·
Replies
5
Views
2K
Block and spring on a weird track (roller coaster)
  • · Replies 9 ·
Replies
9
Views
2K
How to Determine Electric Potential for Coaxial Charged Cylinders?
  • · Replies 23 ·
Replies
23
Views
5K
Magnetic Force Between Current-Carrying Wires
  • · Replies 2 ·
Replies
2
Views
10K
Current on a spring to withstand a weight.
  • · Replies 5 ·
Replies
5
Views
2K
Calculating Horizontal Distance for a Falling Object Without an Angle
  • · Replies 7 ·
Replies
7
Views
2K
Electromagnetic induction of a closed circular wire
  • · Replies 2 ·
Replies
2
Views
1K
Mix steam with colder water, what is final temp?
  • · Replies 2 ·
Replies
2
Views
6K
How to Solve the Twin Paradox Problem Using Lorentz Transformations
  • · Replies 1 ·
Replies
1
Views
2K
Heat transfer from body through layers, using h, T, d, A
  • · Replies 1 ·
Replies
1
Views
2K
Finding the coefficient of static friction on an inclined pl
  • · Replies 1 ·
Replies
1
Views
2K
I understanding this nuclear fission process
  • · Replies 1 ·
Replies
1
Views
2K
Calculate Linear Velocity: Aircraft Direction Vector
  • · Replies 10 ·
Replies
10
Views
2K
Potential of a Charged Spherical Shell
  • · Replies 3 ·
Replies
3
Views
3K
Is Momentum Conserved in Both Collision Scenarios?
  • · Replies 5 ·
Replies
5
Views
5K
Why Won't the Lightbulb Light Up?
  • · Replies 22 ·
Replies
22
Views
3K
How Do You Calculate Forces in a Multi-Block System with Friction?
  • · Replies 7 ·
Replies
7
Views
3K
Help with circular velocity question (unit conversions?)
  • · Replies 2 ·
Replies
2
Views
2K
Closest stable orbit of a body around earth
  • · Replies 2 ·
Replies
2
Views
1K
Nodal lines and single slit experiment
  • · Replies 8 ·
Replies
8
Views
3K
Induced EMF Problem 6.6 Solution Help
  • · Replies 4 ·
Replies
4
Views
1K
Buoyant Force of a block in water
  • · Replies 2 ·
Replies
2
Views
6K
Calculating magnetic flux density using Biot-Savart law.
  • · Replies 3 ·
Replies
3
Views
3K
Potential Step and Wave Functions
  • · Replies 2 ·
Replies
2
Views
2K
Solve Electricity & SHM Homework: Equilibrium Position of Combined Mass
  • · Replies 4 ·
Replies
4
Views
2K