Una bala es disparada con una velocidad de 30 m/s, formando un ángulo de elevación de 30º, respecto a la horizontal. Calcule a) en cuanto
tiempo alcanza la bala su altura máxima? b)a los 3 s, que velocidad
vertical lleva? C) a los 3 s, a que altura se encuentra? D) cual es la
altura alcanzada? E) a que distancia cayó del punto de lanzamiento?

Dalton’s model of an atom is the best described as a) a solar system b) a solid sphere c) a cloud d) a scoop of chocolate chip ice cream

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)

What causes the formation of ocean currents?