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.
Flux through a cylindrical surface enclosing part of a sphere
  • · Replies 9 ·
Replies
9
Views
1K
Specific heat capacity and latent heat
  • · Replies 2 ·
Replies
2
Views
844
Calculating the Planck Length
  • · Replies 3 ·
Replies
3
Views
857
Can a dipole be modeled as a point charge?
  • · Replies 10 ·
Replies
10
Views
1K
Calculate the radius of gyration for a plane figure
  • · Replies 6 ·
Replies
6
Views
753
Dynamics of Circular Motion
  • · Replies 12 ·
Replies
12
Views
998
Calculating acceleration of a prism and block connected to a wall through a rope and pulley
  • · Replies 4 ·
Replies
4
Views
868
Block drifts off between two moving planes through friction
  • · Replies 21 ·
Replies
21
Views
1K
The sign of the change in potential
  • · Replies 7 ·
Replies
7
Views
899
How come violet, with the shortest wavelength, is refracted the most?
  • · Replies 3 ·
Replies
3
Views
683
Calculating the time needed until a known velocity for a vehicle with friction as a function of velocity
  • · Replies 3 ·
Replies
3
Views
721
Question About homework on Coulomb's Law
  • · Replies 8 ·
Replies
8
Views
966
Variable Mass system : Sand falling into a Freight car
  • · Replies 6 ·
Replies
6
Views
842
Spherical conducting shell enclosing a non-conducting core
  • · Replies 5 ·
Replies
5
Views
679
Concentric conducting cylinders
  • · Replies 7 ·
Replies
7
Views
856
Slight Confusion in Introductory Mechanics (Dynamics Problem)
  • · Replies 15 ·
Replies
15
Views
1K
The flux through a cylinder from a charge at the origin
  • · Replies 5 ·
Replies
5
Views
650
Writing a vector parallel and normal to a unit vector ##\hat n##
  • · Replies 26 ·
Replies
26
Views
2K
Equilibrium Position of a Hanging Candy Cane
  • · Replies 17 ·
Replies
17
Views
1K
An interesting GCSE question: Why are electric lamps connected in parallel in house wiring?
  • · Replies 14 ·
Replies
14
Views
723
LC oscillations - two capacitors and an inductor
  • · Replies 15 ·
Replies
15
Views
905
Angular motion of a car wheel traveling at certain speed
  • · Replies 12 ·
Replies
12
Views
1K
5 charges within a square boundary
  • · Replies 7 ·
Replies
7
Views
802
Newton's law of gravitation, energy and centre of mass question
  • · Replies 6 ·
Replies
6
Views
743
Acceleration of an Electron in a Uniform Electric Field
  • · Replies 2 ·
Replies
2
Views
668
Two charged spheres connected to walls by two springs
  • · Replies 7 ·
Replies
7
Views
758
Measurement technology textbook problems
  • · Replies 1 ·
Replies
1
Views
754
Ice Core Density Problem (Inspired by NEEM)
  • · Replies 6 ·
Replies
6
Views
696
Finding the charge on pith balls
  • · Replies 9 ·
Replies
9
Views
869
2D rigid body mechanics: force applied on sliding cart
  • · Replies 14 ·
Replies
14
Views
1K
Cutting the Dose Rate in half with shielding
  • · Replies 5 ·
Replies
5
Views
735
🔹RC Circuit with Series Capacitors — One Pre-Charged, One Uncharged
  • · Replies 11 ·
Replies
11
Views
1K
Measurement technology textbook problems
  • · Replies 2 ·
Replies
2
Views
666
What is the Final Temperature When Mixing Water and Ice, Assuming All Ice Melts?
  • · Replies 12 ·
Replies
12
Views
1K
Projectile motion with ##N## bounces on the ground
  • · Replies 21 ·
Replies
21
Views
1K
How to calculate freezing time for a moist food by-product (75% water)
  • · Replies 6 ·
Replies
6
Views
935
A lead bullet gets embedded in a lead block
  • · Replies 17 ·
Replies
17
Views
812
Can the braking force be significantly greater than the force acting on the brake structure?
  • · Replies 25 ·
Replies
25
Views
1K
Question on magnetism: Circular motion of charged particle in a Magnetic Field
  • · Replies 34 ·
2
Replies
34
Views
2K
A question about a wheel rolling without slipping while tied to a cube
  • · Replies 11 ·
Replies
11
Views
997
Thermally insulated container with alternating series of walls
  • · Replies 49 ·
2
Replies
49
Views
3K
Can somebody explain what is happening here? (sunlight refracting in Earth's atmosphere)
  • · Replies 12 ·
Replies
12
Views
924
An exploding cannon shell
  • · Replies 4 ·
Replies
4
Views
911
How to Calculate Amplitude Decrease in Damped Harmonic Motion After 10 Cycles?
  • · Replies 3 ·
Replies
3
Views
854
Minimum angular velocity of a point mass on a rotating rod
  • · Replies 5 ·
Replies
5
Views
864
Roller coaster mock Lab Report
  • · Replies 9 ·
Replies
9
Views
875
Faraday's Law and magnetic flux
  • · Replies 3 ·
Replies
3
Views
787
Physics exercise: Pressure in this Fresh Water Tank
  • · Replies 3 ·
Replies
3
Views
763
Finding displacement from position time graph
  • · Replies 4 ·
Replies
4
Views
763
Acceleration of beads on a ring
  • · Replies 5 ·
Replies
5
Views
905
Rope between inclines with maximum length of hanging middle portion
  • · Replies 46 ·
2
Replies
46
Views
5K
What is the derivation of the second equation for area velocity?
  • · Replies 3 ·
Replies
3
Views
2K
Find in terms of ##h## when ##P## comes instantaneously to rest
  • · Replies 36 ·
2
Replies
36
Views
3K
A stone is dropped from an ascending balloon...
  • · Replies 10 ·
Replies
10
Views
1K
Any Edexcel A Level Physics Teachers Here - Paper 1 Q13?
  • · Replies 13 ·
Replies
13
Views
1K
Coulomb’s Law Problem: Electrostatic Forces Between Charges
  • · Replies 6 ·
Replies
6
Views
941
Calculating flux through a plane cutting two concentric cylinders
  • · Replies 26 ·
Replies
26
Views
1K
Identical cones rotating while in contact with each other
  • · Replies 12 ·
Replies
12
Views
1K
Ford Nucleon -- Fission Powered Car Calculation
  • · Replies 3 ·
Replies
3
Views
741
Collision between snooker balls
  • · Replies 3 ·
Replies
3
Views
938
Introductory Physics: Connection of Resistors ...
  • · Replies 15 ·
Replies
15
Views
1K
Friction on a spinning wheel when it is dropped onto the ground
  • · Replies 30 ·
2
Replies
30
Views
1K
Frequency to wavelength question (thermal Doppler broadening)
  • · Replies 3 ·
Replies
3
Views
920
Acceleration of a Block Sliding Down a Wedge
  • · Replies 3 ·
Replies
3
Views
1K
Calculating velocity of a particle if distances are constant
  • · Replies 11 ·
Replies
11
Views
1K
How to find motional emf w/o an equation for mag field?
  • · Replies 7 ·
Replies
7
Views
798
Calculating the voltage across capacitors and resistors with switches
  • · Replies 2 ·
Replies
2
Views
931
Find V-I characteristic for this circuit with ideal diode
  • · Replies 2 ·
Replies
2
Views
2K
Purcell Electromagnetism p.301-303: "the longitudinal current I flows, in effect, on the cylinder itself"?
  • · Replies 1 ·
Replies
1
Views
851
Acceleration of the midpoint of a light rod
  • · Replies 3 ·
Replies
3
Views
984
Work Done in slowly pulling a thread
  • · Replies 28 ·
Replies
28
Views
2K
Field of contact forces
  • · Replies 6 ·
Replies
6
Views
1K
Determine the Thevenin equivalent circuit
  • · Replies 2 ·
Replies
2
Views
2K
Angular Momentum Problem: Mouse walking on a rotating turntable
  • · Replies 5 ·
Replies
5
Views
1K
Earthing of two parallel conducting plates
  • · Replies 11 ·
Replies
11
Views
1K
Purcell 1.77 Electron jelly
  • · Replies 2 ·
Replies
2
Views
998
How can voltage between unlike charges decrease with proximity?
  • · Replies 4 ·
Replies
4
Views
918
Wave interference, "beats" problem
  • · Replies 19 ·
Replies
19
Views
1K
Aerodynamics of a helicopter blade
  • · Replies 4 ·
Replies
4
Views
1K
Which pairs of these diagrams represent equivalent circuits?
  • · Replies 4 ·
Replies
4
Views
885
I want to know if the sketch I've drawn of the catenary suits the exercise
  • · Replies 11 ·
Replies
11
Views
1K
Trying to study for my exam but got stuck on exercise
  • · Replies 7 ·
Replies
7
Views
993
Direction and magnitude of electric field produced by current change
  • · Replies 8 ·
Replies
8
Views
1K
Average battery current in battery charger
  • · Replies 7 ·
Replies
7
Views
1K
Electrostatics: Gauss' Law Problem Finding the Flux through a Conducting Spherical Shell
  • · Replies 9 ·
Replies
9
Views
2K
Questions about a capacitor with 4 parallel plates
  • · Replies 14 ·
Replies
14
Views
1K
Drop of voltage between terminals while conductive rod is rotating
  • · Replies 5 ·
Replies
5
Views
1K
Motion puzzle: Bird flying between a train and a platform
  • · Replies 84 ·
3
Replies
84
Views
5K
Debugging a Kelvin Water Dropper
  • · Replies 10 ·
Replies
10
Views
2K
Electric displacement field density equation
  • · Replies 1 ·
Replies
1
Views
969
Calculating of currents in a circuit
  • · Replies 2 ·
Replies
2
Views
834
Force to move a 24 tonne truck one foot in one second
  • · Replies 10 ·
Replies
10
Views
1K
Why does the propagation constant in the Helmholtz equation include j?
  • · Replies 3 ·
Replies
3
Views
1K
Record Player Physics
  • · Replies 7 ·
Replies
7
Views
1K
Dielectric boundary value problems
  • · Replies 2 ·
Replies
2
Views
897
Polarisation of dielectric materials
  • · Replies 5 ·
Replies
5
Views
830
Capacitors, equipotentials, and electric fields
  • · Replies 5 ·
Replies
5
Views
1K
How do you calculate the pull of this piston?
  • · Replies 27 ·
Replies
27
Views
1K
Coin sliding on a table slides across an expanding fabric tape
  • · Replies 1 ·
Replies
1
Views
784
Combined tensions of an RLC series circuit with AC current
  • · Replies 3 ·
Replies
3
Views
1K