Un globo aerostático asciende con velocidad constante de 2.45 m/s. Cuando el globo aerostático está subiendo y se encuentra a 350 m de altura, un pasajero suelta un paquete. ¿Con qué rapidez llega el paquete al suelo?

Plss anybody know how to do this? ? i need the answers from a through d

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?