Recent content by Thiendrah

Homework Statement Hot CO₂ gas enters a pipe at pressure P₁ and exits at atmospheric pressure (P₂ = 1 bar) and T₂ = 0°C. The pipe has a constant diameter D = 1 cm. The input temperature is T₁ = 100°C and the mass flow rate ṁ = 0.5 g/min. There is a significant change in mechanical energy due...

Is there any exception where I can't use wronskian rule to see if given functions are linearly independent or dependent? Thanks...

minifhncc, that's the same thing. You still get the same result. 0^2=14.5^2+2.(-9.8).S S=10.727 10.727 + 12 = 22.727... this doesn't make sense tho. The object is thrown vertically upward off a roof that's 30meters above the ground. Am i doing anything wrong?

Homework Statement A ball is thrown vertically upward with an initial velocity at the edge of the roof of a building which is 30m above the ground. The speed of the ball is 14.5 m/s when the ball is 12m above the ground. How long does the ball take to reach maximum height? Homework...

oh, I think i got it. So we got our force FnXsinQ=m.a=m.(vXv)/r, also the other component is "mg", so when you divide those two, you will get mvv/gr. thanks a lot.

Homework Statement A pilot with mass m fles an airplane at a speed of v in a turn of radius r. Prove that angle of the wings of the airplane to the horizontal is tanQ=(VxV)/gr Homework Equations The Attempt at a Solution This was asked on my first exam last week. Since it's...

1n=2e 4n=8e 8e+6e=14e

that's the displacement vector for part b.

Homework Statement A city's streets are laid out with its north-south blocks twice as long as its east-west blocks. You walk 6 blocks east and 4 blocks north. Part A Determine the total distance you've walked. Express answers in units of east-west blocks. Part B Determine the magnitude...

Yeah, your answer is correct too. Only thing i did wrong was converting units. Everytime i did this problem, I'd have numerator and denominator in different units for the first equation. Thanks both.

Ok, here is a weird thing. The site you gave me. I found the average velocity. Then that times with 6s gave me the displacement. which is the answer. But the thing is i can't find the answer with those equations. It's basically the same thing. Still can't find it.

you kinda confused me. That's what i did. I found the acceleration from the first equation. V=V(0)+at. I mean we know V=80km/h, V(0)= 70km/h, and t=6. Only thing left is a, right?. If i plug the acceleration i found with this in second equation. The answer isn't correct.

Homework Statement You're driving at 70 km/h when you accelerate with constant acceleration to pass another car. Six seconds later, you're doing 80 km/h. How far did you go in this time? Express your answer using two significant figures.Homework Equations V= V(0)+at V^2- V(0)^2 = 2a (...