Un barco pequeño sale de un puerto y se mueve a 36 km/h en línea recta a 30º al noroeste durante 40 min. Luego de eso se detiene, pero aparece una pequeña corriente que mueve el barco a 5 km/h hacia el oeste. La tripulación del barco se entera de la corriente 3 horas después de que empezó a actuar, en ese momento deciden volver al puerto con la misma rapidez de 25 km/h y viajando en línea recta

If steel is more dense that lake water, why can a boat float

True or false graphs must include scales that increase by the same amount

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants