Water at 20 c flows steadily through the box in fig. p3.56, entering station (1) at 2 m/s. calculate the (a) horizontal and (b) vertical forces required to hold the box stationary against the flow momentum. water at 208c flows steadily through the box in fig. p3.56, entering station (1) at 2 m/s. calculate the (a) horizontal and (b) vertical forces required to hold the box stationary against the flow momentum.

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87