Recent content by iamkristing

Thank you...My 11 looked like a 4 in my notes...simple mistakes can kill you! haha I got a very large velocity now so the answer makes more sense.

[SOLVED] speed of two protons (I think an easy question) Homework Statement If you release two protons from rest 1.500nm apart, calculate the top speed, relative to you, that either proton will achieve. Homework Equations F=ma ke^2/r=mv^2 where k=9.0e9 Nm^2/C^2 and e is the charge...

[SOLVED] speed of electrons Homework Statement In the Bohr model of the hydrogen atom, an electron circles a proton at a radius of 5.3e-11 m. How fast must the electron be moving if the centripetal acceleration is to be supplied by Coulombic attraction? Homework Equations L=n(h/2pi)...

I corrected the units and still am off. Is the theory/formulas I used correct?

Thanks I did mess up on the units. And ill make sure to write it out next time!

Homework Statement The Mars Odyssey spacecraft was launched on April 7, 2001. It underwent orbital insertion. To minimize the amount of fuel required for the insertion process, a highly elliptical orbit was chosen, but circular orbits are far superior for the type of mapping work in...

Homework Statement Beverage Engineering. The pull tab was a major advance in the engineering design of beverage containers. The tab pivots on a central bolt in the can's top. When you pull upward on one end of the tab, the other end presses downward on a portion of the can's top that has...

Homework Statement A rocket with a mass M moves along an x-axis at the constant speed vi=40 m/s. A small explosion separates the rocket into a rear section (of mass m1) and a front section; both sections move along the x axis. The relative speed between the rear and front sections is 20 m/s...

or would you use the conservation of momentum? M(40m/s)=m1fv1f+m2fv2f which simplifies to v2f=(40M+20mi)/M Now there is three unknowns...i think its asking for a value though...

ok thanks I got it!

Would the rotational KE be .5Iwf^2? Where I=(1/12)ML^2 and then you just add that on to the final kinetic energy and solve for vf?

Homework Statement A rocket with a mass M moves along an x-axis at the constant speed vi=40 m/s. A small explosion separates the rocket into a rear section (of mass m1) and a front section; both sections move along the x axis. The relative speed between the rear and front sections is 20...

[SOLVED] rotational dynamics Homework Statement A thin uniform rod has length 2.0 m and can pivot about a horizontal, frictionless pin through one end. It is released from rest as angle theta=40 above the horizontal. Use the principle of conservation of energy to determine the angular...

i adjusted that term by a million. and now that term is too large. I plugged in the correct answer of 90, hoping that the entire term will go to zero. But it goes to a number greater than -6 million. I am supposed to be solving for the x^2 and the x in the equation correct?

im still getting an answer of about 6 million...when the answer is 90...