Recent content by Traced

Alright thank you. This is what I've done now: Let West be the positive direction v1f = V1 (m1 - m2) / (m2 + m1) = (3.0)(0.6-0.8) / (0.8-0.6) = -0.44 m/s v2f = 2m1(v1) / (m2+m1) = 2 (0.6) (3.0) / (0.8 + 0.6) = 2.57 m/s So if this is done properly the answers would be v1 = 2.44 m/s [W]...

This is what I did in my first attempt but in my lesson it shows an example like this: Which is why in my attempt above I added the 2.0m/s onto the 5.0 m/s. Am I misunderstanding this?

The way I learned to solve this was to switch to a frame of reference where one object is stationary. given: m1 =0.6kg v1 = 5.0m/s [W], m2 = 0.8kg v2 = 2.0 m/s [E] Setting v2 to rest by adding 2.0 m/s W to each object New velocities are v1 = 7.0 m/s [E] and v2 = 0.0m/s Then using the...

Okay. Could you show me the steps I need to take to arrive at that equation? Or help me get started please! Would I be using mv^2/r = mg?

I saw someone online calculate the minimum speed at the bottom of the circle like this: v=√v^2_top + 2gr = √3 * v_top = 2.71 m/s. I don't really understand this equation, and I don't know what it's called or why it was used. After this, to solve for the tension they did Ft = mg + mv^2 / r Ft...

I just re-read through all of my lessons and I couldn't find any conservation laws. Is there another way to solve this question? The law of conservation of energy maybe? I just haven't seen that get used in any examples in my textbook for questions like this.

a)Determine the slowest speed that the keys can swing and still maintain a circular path. Fnet = Fg + Ft Fc = Fg + Ft When Ft = 0, Fc = Fg So, Fc = mv^2 / r and Fg = mg mv^2/r = mg v = √gr v = √9.81 * 0.25 v = 1.56 m/s Therefore, the slowest speed that the keys can swing and still maintain...

I know what K does, what can change K, and I know about the equilibrium equation. I don't know how to use that to answer this problem. I'm not given any chemical reactions or their K values. How should I start this problem?

My answer is -0.40 kJ/mol. I'm having trouble understanding why the molar enthalpy of the solution is a negative number. Wouldn't this mean that the solution is losing energy? If the temperature of the water heats up from 20 degrees Celsius to 36 degrees Celsius shouldn't the final answer be...

Do you mean like this? l>=3w+1 and h>=2w-5? This way the length and the height have the constraints.

Sorry I'm still confused. I'm just not really understanding this.

I'm still confused. Could you explain it a bit more please? Right now I have 3 dimensions, l=37, w=12 and h=19. The dimensions I have the minimum dimensions that will give a box of ##8436m^{3}##. I'm confused by I guess I could do something like this? w>=12 l>=37 h>=19 I don't know if that...

I understand how to get the dimensions that equal 8436m^3. What I don't understand is how to find the range of all possible dimensions. I solved the inequality to get ##6w^{3}-13w^{2}-5w-8436## Using systematic guessing I found the root is x=4, so the factor is x-4. Dividing (x-4) into...