Tres fuerzas actúan simultáneamente sobre una masa de 20 kg. Los valores de las fuerzas de P y Q son de 5 N y - 10 N respectivamente. Debido a las fuerzas el valor de la aceleración que adquiere el cuerpo es de -0,5 m/s2, por lo tanto el valor de la fuerza R es: a) 10 N
b) 5 N
c)-5 N
d)-10 N
e)-15 N

Avertical clean glass piezometer tube has an inside diameter of d = 1 mm and is used to measure pressure in a horizontal pipe carrying water as shown. due to pressure in the pipe, the water at 20c rises into the tube to a height h. if the water pressure in the pipe is p = 500 pa gauge, estimate the height h: (a) without considering surface tension (b) with surface tension (capillary) effects. the contact angle  can be assumed at 30 deg

Ablue car pulls away from a red stop-light just after it has turned green with a constant acceleration of 0.5 m/s 2 . a green car arrives at the position of the stop-light 6.5 s after the light had turned green. if t = 0 when the light turns green, at what time does the green car catch the blue car if the green car maintains the slowest constant speed necessary to catch up to the blue car? answer in units of s.

Ionic compounds can be readily dissolved in water because the high dielectric constant of water screens and decreases the force between the oppositely charged ions.