Adog chasing a cat has 0.55 times the kinetic energy of the cat, which has 0.45 times the weight of the dog. the dog speeds up by 0.91 m/s and then has the same kinetic energy as the cat. what was the original difference in speed of the dog and cat? in other words, what is v_sub_cat - v_sub_dog initially (before the dog speeds up)?

Julia would be observing a. static electricity was caused by her sweater rubbing against her shirt and transferring electrons. she didn't touch anything metal, so that would cancel out b.she most likely didn't rub her sweater against her hair either, so that cancels out c.she also didn't scoot across the carpet while trying to take her sweater off, that cancels out d.so that leaves a.a. is correct.