What subatomic particle has a nuetral charge?

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

Why don't you see your reflection in water with waves or repples

How does an observation about an object differ from an inference about that object