Desarrolla y justifica cada una de las siguientes preguntas:

1. Cuando se habla de la velocidad media, nos referimos a un movimiento:
a) Uniforme
b) Variado y uniforme.
c) Variado.
d) Son falsas las anteriores afirmaciones
¿Por que ?
2. La línea que dibuja un móvil en su movimiento se llama:
a) Línea del movimiento.
b) Trayectoria.
c) Camino recorrido
d) Vector de posición.
¿Por que?
3. Para que un sistema de referencia sea válido tiene que estar:
a) Siempre en reposo.
b) Siempre en movimiento.
c) En reposo para movimientos terrestres.
d) Ninguna de las anteriores.
¿Por que?

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

Avoltaic cell converts chemical energy to