La velocidad de un vehículo aumenta uniformemente desde 15 km/h hasta 60 km/h en 20 seg. calcular:
a) la velocidad media en km/h y m/s
b) la aceleración
c) la distancia, en metros, recorrida durante este tiempo.

70 give a real life example showing how sensory neurons work with the motor neurons

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?

The horizontal blue line through the middle of the lens is called the optical axis. as the lamp is moved above or below the axis, keeping the horizontal distance to the center of the lens constant, how does the horizontal distance from the lens to the image change?