Recent content by Ly444999

Thanks for your help!

I'm not sure if I'm following but, since the magnetic field is applied perpendicularly to the plane of the coil, the angle is actually 0 instead of 90?

So would no angle at all be used in this case?

Homework Statement A coil with 200 turns of wire is wrapped on an 18.0 cm square frame. Each turn has the same area, equal to that of the frame, and the total resistance of the coil is 2.0Ω . A uniform magnetic field is applied perpendicularly to the plane of the coil. If the field changes...

Homework Statement http://imgur.com/a/FDfAp What is the phase constant? Homework Equations x(t) = A*cos(ωt+Φ) The Attempt at a Solution If I'm not mistaken at t = 0 the graph starts at half the amplitude or 5. Also the amplitude of this graph is 10, and at t = 0 angular velocity is also 0. 5...

I'm fairly certain the 512 J considering the question asked about the child in the potato sack and this is calculated by using the mass of the child and the potato sack.

I already added the masses in the calculations in my post but calculating the thermal energy with just the mass of the child I end up with 492 J.

I just wanted a second opinion on whether or not my thinking was correct, since I was not sure if my reasoning and calculations was wrong in any way. Also 3 sig figs should be kept so the answer is really 512 J. Thank you very much though.

Homework Statement A 26.2 kg child rides a 1.00 kg potato sack down a 2.05 m high slide. If the child starts from rest and has a speed of 1.60 m/s at the bottom of the slide, what is the change in thermal energy of the child on their potato sack and the slide? Homework Equations KE = (1/2)mv2...

Homework Statement In the figure provided, two suitcases are on a 6.36 m high ramp to passengers waiting in a baggage terminal. The top suitcase is released from rest, and it slides down the ramp and hits the second suitcase. If the suitcase at the top has a mass of 11.8 kg and the other...

****, ok I'm very unintelligent, for some reason in my calculations I'm using 21.5 as my degrees I don't know why, thank you for pointing out my obvious mistake though lol. Edit: I got right answer thank you lol.

Homework Statement A 259 g textbook slides up a 22.1° incline that is 2.55 m long. Using conservation of energy and assuming the incline is frictionless, what minimum initial speed is needed to accomplish this? mass = 0.259 kg Θ = 22.1° length of incline = 2.55 m Homework Equations KE =...

So I just had a question about calculating moles atomic iodine when you have the moles of molecular iodine. In the chemical equation IO3-(aq) + I-(aq) + H+(aq) = I2(aq) + H2O(l) Would the moles of atomic iodine be equal to the moles of the molecular iodine? or would the moles of atomic iodine...

Oh so the radius isn't half the length of the rope? Edit: Ok I see why radius isn't half the length never mind and thank you for pointing that out

Homework Statement A hockey puck with mass 200 g is attached to a rope of length 62.0 cm and swung in a horizontal circle against the ice at a rate of 58.0 rpm. Assuming the ice is frictionless, what is the tension in the rope? Homework Equations FT = mω2r The Attempt at a Solution 58rpm =...