Recent content by McDonell

Homework Statement A 1kg of ice at -30° C is added to 10 kg of steam at 500°C. answer the following questions: a) What is the final phase of the system of ice + steam if no heat escaped from it. b) What is the final temperature when the equilibrium is established Homework Equations...

No they do not

well P is the same thing as in my original post. P = usFgSecθ / (1 - usTanθ) Now I don't know how to find the minimum value of P

Homework Statement A crate of weight Fg is pushed by a force P on a horizontal floor. (a) If the coefficient of static friction is μ s and P is directed at angle θ below the horizontal, show that the minimum value of P that will move the crate is given by P = usFgSecθ / (1 - usTanθ)...

for your Quadratic Equation did you get 660.2Tan2θ + 3250Tanθ - 1489.8

Ok I understand how you formulated this equation. Now I can plug my numbers in and I get y=xTanθ+1/2 a(x/vCosθ)2 2150 = 3250Tanθ + 9.8(3250)2) / 2(280)2cos2θ How do I get rid of the tan and cos?

azizlwl can you please elaborate?

I solved the question for myself, but I am wondering if I have done it properly. Mind if I ask what your answer was? I got 48 degrees

What equation did you use to start?

I am working on the same problem. When you do the problem, did you have to solve for time in order to be able to move forward in the question?

Homework Statement Find the angle of the projection for which the maximum height is equal half of the range. Homework Equations Kinematic and Projectile motion equations