1. W jaki sposób można pokazać kształt linii pola magnetycznego mając do dyspozycji magnes sztabkowy, opiłki żelaza, szklaną szybkę. Zapisz przebieg, obserwację , wniosek.

2. Dlaczego wokół Ziemi istnieje pole magnetyczne? Opisz ziemskie pole magnetyczne.

3. Jak działa kompas?
Dziękuję))​

Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.