Recent content by karobins

here is the figure

Homework Statement Suppose an asteroid of mass 1 1019 kg is nearly at rest outside the solar system, far beyond Pluto. It falls toward the Sun and crashes into the Earth at the equator, coming in at an angle of 30 degrees to the vertical as shown, against the direction of rotation of the...

Homework Statement what is the charge of a deutrium? Homework Equations Uelec. = (q1*q2)/r The Attempt at a Solution is it the same as a proton charge? 1.6e-19

no idea...I've thought about potential and kinetic energies but then it always ends up with me having two variables...

Homework Statement For some isotopes of some very heavy nuclei, including nuclei of thorium, uranium, and plutonium, the nucleus will fission (split apart) when it absorbs a slow-moving neutron. Uranium-235, with 92 protons and 143 neutrons, can fission when it absorbs a neutron and becomes...

thanks much for the help!

Homework Statement A spring has a relaxed length of 7 cm and a stiffness of 150 N/m. How much work must you do to change its length from 12 cm to 15 cm? Homework Equations F=-kx, W=F(delta)x The Attempt at a Solution ?? ((.12 m)-(.07 m) * (150 N/m)) = 7.5 N ((.15 m)-(.07 m) *...