Recent content by david98999

----------- My apologies . Q refers to the heat of transformation . I said that the net heat in this internal ice/container/water system is equal to zero .My textbook is Physics for scientists and engineers . Randall Knight 3rd edition

Good day members of physics forums . I am a university student currently studying thermodynamics and I just am a bit confused about a heat transfer problem. If you have the following items: 1 metal container which is well insulated from the outside ; ; 1 quantity of water and an icecube ...

thank you for your help doc al and mfb .I really appreciate it

my textbook is physics for scientists and engineers Pearson Randall D Knight 3rd edition

I am new here and I hope I posted this in the right place. I understand that Hooke's Law is F=-ks which states that the spring force is directly proportional but opposite to the difference of the distance from the stretched length of the string and the equilibrium length of the string. I just...

You are right I did as you said √(2p/m)*√t a=dv/dt=(2p/m)^(1/2) x t^1/2 = 2^(-1) x (2p/m) ^(1/2) x t^(-1/2) = √(2p/(m(2)^2)t)= √(p/2mt) I had a feeling it was a simple error , I'm sorry I wasted every ones' time. Thank you for your help

sorry the function is to find the velocity of an alfa romero car , p= the power in watts , m is the mass and t is the time , the question wants me to derive the velocity as a function of time

Homework Statement Derive the function for the acceleration from this function v=√(2P/M)(√T) The answer is √(P/2MT) I have tried many different attempts but I am still unable to reach this answer. [/B] I am sure the process to get to the answer is a simple one but for some reason I am...

i solved it , { 40x(1/2x120^2)-(20x40^2) } / {1/2 x 120^2)-(40^2)} =45.71 I took the moments of the square and the triangle from right to left and then took the difference of them and divided it by the area of the shape and my answer is 120-45.71=74.29 = 74.3 , I'm so thankful for...

in this book integration has not been covered yet so i believe i must solve it by using the whole area for one moment and the square as a separate area which has a moment in the opposite direction , the triangle is equilateral if i have to go by measurements alone.I will do as you have said

the object is symmetrical about A which cuts the object into two equal parts horizontally , the total area is equal to the area of the triangle minus the square 120x120/2 - 1600= 14400/2-1600=7200-1600=5600 , I then divide it by half because this is the area the shape =2800, the centroid is the...

I took the perpendicular bisectors and found the centroid of the triangle and measured from the right(bottom right point A) to the centerand measured 74 mm, is that all I had to do? I have been so overworked lately that I think I may have overthought the question.I want to thank you for your...

do I measure from the right hand boundary line to the vertices of the triangle or to the centroid of the triangle and what formula do I apply, I appreciate your advice but I can't answer post 6 because I don't have the formula to do so , should I do a scale drawing? are there any resources you...

I am unsure how to measure the centroid when the square is still there because I know the center of gravity has changed , I have no idea how to solve this or what formulas to apply because my book didn't provide them . However, I do know how to calculate the centroid of a rectangular mass ,if...

thank you , it is a study guide for my university so it doesn't state the author, I am in my first year of university and I have studied about one third of my coursework so I will understand any explanation of this problem, I just have no idea as to how to calculate the centroid when the...