Un carro inicia su recorrido con una velocidad de 90m/s, luego de avanzar por un tiempo de 0.5 minutos cambia la velocidad a 50m/s. Hallar el cambio de velocidad.

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Atomic nuclei of almost all elements consist of

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .