Actividad: Sitúese en el siglo III a. c. el rey de Siracusa, Hierón II, le pide determinar si una corona que ha mandado hacer consiste de oro puro.
Suponga que lectura en la balanza es 7.84 N cuando la corona estaba en
aire y 6.84 N cuando estaba en agua. ¿Qué le responderías al rey?
Nota: la densidad del oro es de 19.3 × 103 kg/m3

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

Auniform crate c with mass mc is being transported to the left by a forklift with a constant speed v1. what is the magnitude of the angular momentum of the crate about point a, that is, the point of contact between the front tire of the forklift and the ground

You are standing on a boat. which of the following strategies will make the boat start moving? a. pushing the mast b. throwing some cargo out of the boat c. pushing the front ofthe boat d. pushing another passenger