Recent content by helpmeplzzz

So how would you do it for the probability of Joe contracting an STD twice out of those 4 occasions? I think you would have to do a combination for this?

1-(.75*.75*.75*.75) = my answer?

Homework Statement There is a 1 in 4 chance that on any given sexual encounter, Joe will contract an STD. If Joe has sex 4 times, what are the chances of him having an STD? Homework Equations Something with combinations maybe? The Attempt at a Solution I thought you would just...

There is a 1 in 4 chance that on any given sexual encounter, Joe will contract an STD. If Joe has sex 4 times, what are the chances of him having an STD?

OK, I think that's where my confusion was. Thanks for clearing it up.

The question describes a scenario in which three balls of equal mass are launched from a cannon on top of a 100m cliff at the same speed (50 m/s) but at different angles (0, 30, and 60 degrees). The question asks which of the following balls hits the ground with the greatest kinetic energy. The...

YES! Thanks so much! That's exactly what I did before, but I didn't FOIL the Δv2, I just had vf2-vo2.

Homework Statement I'm studying for my MCAT and currently on translational motion. Rather than memorize the formulas, which would be useless for this type of test, I'm trying to learn and understand where the formulas come from, which requires knowing how to derive them. I need help with...