Recent content by Kratos321

Hi everyone, I have attached an image of the op-amp configuration (all op-amps are ideal). Basically, the question asks to calculate the resistance seen through the voltage source. The answer is 3 kΩ but I just don't understand how this is found. If someone could assist me, I would really...

Hmm, I see. Is this right so far? x(t) = 0.2cos(ωt) v(t) = -0.2ωsin(ωt) 3/4 m*v^2 + mgx = 1/2*k*x^2

I've been thinking about your questions and I am extremely confused. Please expand?

Okay, here's a start. The spring starts out unstretched, so it has zero potential energy. Nothing is moving, so there's no kinetic energy. All the energy of the system is gravitational potential energy. As the weight falls a distance x, some of that energy is converted to potential energy in...

Hello everyone! Here is the link to the problem: http://i.imgur.com/2HNrQ.jpg I don't even know where to start. Any help to get started would be greatly appreciated. Thank you so much. Cheers

THIS ISN'T THE SAME AS MY PREVIOUS QUESTION ALTHOUGH IT HAS THE SAME TITLE Homework Statement The Moon is satellite of Earth with a diameter equal to a quarter of Earth's diameter and a mass equal 1/81 of Earth's mass. The period of the moon's rotation about the Earth is 27d 7h 43.1 min...

Homework Statement An imaginary planet has a diameter twice that of our earth. The planet has one moon with an orbital radius of 5.0x10^7 km and orbital period of 10 Earth days. Determine the strength of the gravitational field at the surface of the planet. Radius of Earth = 6.38 x 10^6m...

An object moves along the x – axis and the position of the object at is given by x(t) = 2 + (3/pi) - (3/pi)(cos(pi/3)t) How do I find the total distance traveled by the object over the time interval 0≤t≤4.5 any help pls? I don't even know where to start. PLEASE!

yeah that's what i figured but is there a reason or explanation for it?

okay so I just have a question about using substitution when solving limits. Say I have the function sinx/x, if i want to find the limit when x--> 0 using approximation ( i know how to prove it with the pinching theorem by the way). So if I substitute 0.0000000001 rad into the function i get...

Hello, Is the force experienced by a charge at any point between two charged parallel plates the same? Just a preliminary step to my homework question, Let's say I have two parallel charged plates. (positive on top and negative on bottom with field lines going downwards.). Would all positive...

just a question on our test today. what's the right answer? a) the mass to charge ratio of an electron is very small. b) the speed of electrons is very great c) the electron has a negative charge d) the proton has a negative charge e) there exists a smallest fundamental negative charge...

Homework Statement In a large water tank experiment, water waves are generated with straight, parallel wave fronts, 3.0m apart. The wave fronts pass through two openings 5.0m apart in a long board. The end of the tank is 3.0m beyond the board. Where should you stand, relative to the...

hello. ok so i know that if you have two tuning forks of the same natural frequency, one can stimulate the same frequency to another and resonance is achieved. but what if I have a 100 Hz tuning fork and say maybe a 180 Hz tuning fork. If a strike the 100 Hz one, how will the other one be...

In thermodynamics, a heat engine is a system that performs the conversion of heat or thermal energy to mechanical work. It does this by bringing a working substance from a high temperature state to a lower temperature state. A heat "source" generates thermal energy that brings the working...