2001 Dodge Intrepid Water Pump Tensioner Issue?

I just purchased this vehicle from a friend of a friend. Runs nice, 185, xxx miles. Paid less than I expected so no complaints.

I noticed the engine had a rattle though when I started it with the hood open. I'm definitely no mechanic, so my first thought was "oh no, it's a rod." But it's not loud… Barely audible with the hood shut, recognizable with the hood open for sure. And it knocks in time with the engine cycle (it rattles faster when I accelerate, etc)

I searched YouTube for similar issues and I heard a video of a newer model Honda engine producing almost the same exact sound. It turned out that the issue of that car was the Water Pump Tensioner. I have no idea what that is, if that would be my issue for sure or how bad it is to continue driving the vehicle in that state if that IS the problem.Anyone want to shed some light on this? Say that the water pump is the problem. Stop driving it? And if it isn't the water pump tensioner, what else?

Added (1). This is the closest sound to what my car makes:

And like I said, it "knocks" faster when giving it some gas.

Which is the better Indian Gear less Scooter. HONDA Activa / TVS Jupiter / YAMAHA Alpha / SUZUKI Lets?

I'm planning to buy a scooter and confused among HONDA Activa / TVS Jupiter / YAMAHA Alpha / SUZUKI Lets.
My Criteria is
1. Concerned about mileage than Power.
2. Should have long run engine than any other features, bcos not plan to change scooter for next 10 years.
3. Price of scooter not a problem
4. Metal body preferred than Fiber.
Friends from your experiences please advise for a decision.Which is the better Indian Gear less Scooter. HONDA Activa TVS Jupiter YAMAHA Alpha SUZUKI Lets

World problem for physics?

A 1255 kg Honda is going through a school zone at 5.0 x 101 km/h and then the driver quickly
steps on the brakes to make the car come to a complete stop by skidding 3.0 x 101 m. What is
the work done on the car by the frictional forces? (Hint: the answer is negative because the
force and the displacement are in the opposite directions.)

Paint job help and recommendations needed?

I don't know what happened? I went to a friends house to hang out and this was last night. There house was gated so I had to dial in so I could get through. I was trying not to scrape my car against the security box, but somehow I did. The only area of the car that has been affected was the drivers side back door. I drive a 2004 Honda Element ex. I live in maple valley Washington and looking for a cheap paint job.

Brake caliper pistons won't release?

I had to take my front wheel of my Honda Ruckus, and upon reassembling, I had to use a screwdriver to move the pads apart a little for it to go on the disk. Now each time I hit my brakes, the pistons come out just a little more, until they're all the way out and I can't move the Ruckus. Why aren't my positions releasing properly? Or at all?

Can I give my car back? How does that work?

I just got a 2014 Nissan Versa. I got it through my credit union, but my grandparents are giving me money to get the 2015 Honda PCX 150 scooter for college. I won't have to make payments on the scooter besides the Insurance. So, I was wondering if I could give the Versa back. How does that work? Will it hurt my credit score? If I can't then that's fine. I'll just hold off on the scooter.