Homework Statement
Find h so that:
8x + 7y = 7
16x + hy = 14
has infinitely many solutions (solve this exercise with matrices).
Homework Equations

The Attempt at a Solution
I converted the system to matrix form, but when I try to convert it to echelon form, I get the...
Homework Statement
Does lim x> 2 (3x2+ax+a+3)/(x2+x2) exist?
If so, find the limit.
Homework Equations

The Attempt at a Solution
I've tried factorizing the denominator to (x+2)(x1), but then I don't know how to proceed on the exercise. I have seen that the limit exists...
Homework Statement
I was wondering, how can i measure the specific heat capacity of a solution? Not the exercise, just doing an experimental work to measure it.
Homework Equations
q=mct
The Attempt at a Solution
I'm lost.
Homework Statement
In the picture.
Homework Equations
I guess λ=cv? I'm not sure on this one.
The Attempt at a Solution
I don't know how the velocity and the displacement are related in this exercise. However, i do recall the graphs of displacement, velocity and acceleration in SMH.
Homework Statement
In the picture.
Homework Equations
Right/left hand rule?
The Attempt at a Solution
I have tried applying the right hand rule to this situation, but they only give me the current and nothing else, so i can't determine the direction of the magnetic field in the point P.
Hello! My second time here, and this forum has really been helpful.
I got a question:
How could i do an experiment to study the SHM of a mass between two springs? I've tried doing it, but the mass can't complete one cycle, and friction is always a problem. Is there a way to reduce it...
Homework Statement
A student has six books, all of them with a 4cm thickness and a weight of 30N. ¿What would be the minimum work to put the books in one pile, if the six books are in a table?
Weight: 30N
Thickness: 4cm.
Gravity: 9.81ms2
Homework Equations
Ep=mgh
Ec=(mv2)/2...
I need help on this proble:
A student has six books, all of them with a 4cm thickness and a weight of 30N. ¿What would be the minimum work to put the books in one pile, if the six books are in a table?
Need help on this problem:
10. A fireman is holding a hosepipe so that water leaves the pipe horizontally. The hosepipe has a constant crosssectional area. The magnitude of the force that the fireman exerts to hold the hosepipe stationary is F.
The volume of water delivered by the hose per...
Hello, our teacher told us that how could we find the gravitational force of the Earth, and i wanted to do it with falling objects (Only option i got, no pendulums).
Does anyone have an idea what is a freefall apparatus? I wanted to measure it just with a cronometer, but i need more precise...