Recent content by buttermellow

Homework Statement The problem states: "Draw the chemical structure of ATP at a pH of 7. Homework Equations The Attempt at a Solution The textbook diagrams the phophate groups as unprotonated, but since H3PO4 has a pKa of <7, I was thinking that maybe each phosphate group would have lost one...

Say you had an equation like E = .5mv2. If in an experiment the velocity is measured, but has an error of 10%, what would be the total error in calculating E?

The question is from a lab, and yes, it was worded poorly. The frequency was set and the length changed until a standing wave at the first mode was attained. After doing that for each frequency, a graph of frequency vs. 1/L was constructed (not recorded, as I said earlier). From this graph...

Homework Statement The frequency of a vibrating string is set to 15, 20, 25, 30, or 35 Hz and the length needed to attain a standing wave (mode 1) is recorded. A graph of frequency versus 1/L is recorded. Calculate the mass per unit length of the string. The resulting graph has the...

Oh my, I was making that much harder than it needed to be. What I got: .5mHe(vHe)2=2mHe(vO)2 mHe cancels to give (vHe)2=4(vO)2 (vHe)2/(vO)2=4 vHe/vO=\sqrt{}4=2

Homework Statement An oxygen atom is four times as massive as a helium atom. In an experiment, a helium atom and an oxygen atom have the same kinetic energy. What is the ratio vHe /vO of their speeds? Homework Equations K=.5mv2 The Attempt at a Solution...

Alright, I actually figured it out myself. v= \sqrt{}Gm/r and v=\omega*r so the mass of Mars is 6.5*10^23 kg!

Homework Statement Given data: A moon of Mars orbits with a period of 459 minutes. The radius of the moon's orbit is 9.4x10^6 m. What is the mass of mars? Homework Equations The Attempt at a Solution The only relevant equation I could find was Fmars on moon= (G*m1*m2)/(r2)...