How much weight should I have in my 1999 rear wheel drive Grand Marquis?

I have brand new snow tires in the back, decent tread in the front, tire pressure is good and 300 pounds in the trunk. New upper & lower ball joint and front end alignment...and it still feels like I am hydroplaning! Do i have too much weight & it is pulling the front end up? Any ideas what else could be causing this feeling? Only 110,000 miles. I have had the car since 48,000 miles & it spent 14 of its year in Florida (now in Michigan) so pretty much rust free.I feel panicky driving and need to figure something out before I crash into another car!

How much trouble am I going to be in?

So I'm a fairly new driver (got my license in CA about 4 of weeks ago) and have been a good driver, not even been honked at. But the other day it was raining and I was driving somewhere I shouldn't have been (It was actually IHOP but I didn't tell my parents so I would have been in trouble if they found out) and I stopped too short and barely hit the bumper of the car in front of me. We pulled over and saw no damage (but it was also dark) and she was really nice but said she was leasing the car so she needed my info and I was so nervous but I gave it to her and apologized over and over and she said she would call today if there was any damage. it's around 5:30 and she hasn't called yet, but if there was any damage to the car it would be on what looked to be a rubberized bumper, and I want to know what could happen if she calls really late and there is any damage. I'm hoping she doesn't call, she said she probably wouldn't, so I also didn't tell my parents. But if anybody could help me figure this out I'm really nervous and could use some input. I know I messed up and I am really sorry, but thanks to anyone who could help answer my question.

My car is making a whining sound, what could it be?

My car is has been making a whining sound for a while now, at first i thought it was because i hade low power steering fluid so i filled it off, but it keep making the sound, then my uncle said it was the alternator so i changed it, but its still making that sound, now in frustrated, what could it be?

how can i hook up a 20w striplight growlight to a battery?

car battery or other battery. how would this connect as the light you would usually just plug into the wall, and how long would it run for flat out, I need to be able to recharge a battery so when the other is ran out the other is good to go