Recent content by alingy2

You want to have a ph of 9.55 with a buffer. How many grames of CH3NH3ClO4 would you add to 800 ml of 0.258 M CH3NH2 to do this. Assume volume remains constant. Kb for methylamine is 4.2x10^-4. My answer is 320g. Can anyone check this please? I have an exam on buffers very fast. You would do...

Can the skier ever land without losing some velocity?

One doubt remains: even the skier lands parallel to the ground, there is still a collision, a loss of velocity, no?

Please look at attached picture. Why did my teacher assume that vf does not change upon landing in the last sub-question? This makes no sense to me. Is there such a way that the skier can change direction of vf without changing the magnitude of it? Otherwise, the skier will collide in an...

Hello, My textbook says that if two equal masses, with the second one of them at rest initially, collide in an elastic collision. The first mass will stop and the second one will have the initial speed of the first mass. WHY? This makes no sense to me. Elastic collision only means momentum...

A cylindrical container of height 1 m and diameter 0.5 m is partially filled with apple juice. When the container is lying on its side, the juice level at the deepest point is 37.5 cm (three eighths of a meter from the bottom of the cylinder is full). What is the liquid level after the container...

There is a graph associated to it. Please look at the screenshot. Ok, so, here is my process. I modeled the three functions. y=x y=1/a^2 x and y=1/x Then, I calculated A using calculus. (Integrals) Integral of x-1/a^2 x from 0 to 1 + integral of 1/x-1/a^2 x from 1 to a A=1-1/a^2...

Should I need more info than just the formula to know if acid or base? Why? I am really confused. What does R stand for? SORRY, I MEANT NR3. PLEASE IGNORE CH3NH3ClO2.

Hello, I solved the arc length for a particular problem. However, what is the unit of arc length if the units of the velocity vs time graph are m/s vs s? I am really confused.

Imagine that a single bead has a hole in it. It is passed inside a " vertical " circle with no friction. Imagine that the "vertical"circle moves by spinning around its vertical axis and that the bead is, AT THE BEGINNING, on the bottom of the vertical circle. We had another problem related to...

This is really a tough problem. I was able to solve it using partial fractions at first, completing the square, and several substitutions. I get the same answer as Wolfram Alpha. I feel as though there is an easier way. Any hints?

What initial concentration of HF (aq) in water would give a solution with a pH = 1.5? I think the K value is missing... How could we solve this problem?

Cwatters: experimental data of course! But how does that link to W=Ffriction* delta s not being usable? I am so lost :(

I just don't get why they say we can't use W=Ffriction*delta s. This would allow us to find change in thermal energy.

Sorry! I posted on my brother's account "alingy2".