Ask your teacher the magnetic flux through a metal ring varies with time t according to φb = at3 − bt2, where φb is in webers, a = 6.00 wb s−3, b = 18.0 wb s−2, and t is in seconds. the resistance of the ring is 2.50 ω. for the interval from t = 0 to t = 2.00 s, determine the maximum current induced in the ring.

Um vetor representa um deslocamento cujo módulo é 20 m. se v faz um ângulo de 60 graus com a horizontal, qual é o valor das componentes horizontal e vertical deste vetor?

Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?

If a hiker that weighs 600 newtons climbs a 50 meter hill, how much gravitational potential energy has the hiker gained?