A rocket engine shoots exhaust gas at 5.0E8 Pa of gas pressure through a nozzle whose area is 0.3 m 2. What is the force pushing the rocket forward?

I got 680 N is this correct?

B5

Water (density = 1000 kg/m3) flows through a fire hose with a velocity of 5.0 m/s and a pressure of 150,000 Pa. At the nozzle, the pressure is 101,300 Pa, and there is no change in height. What is the velocity of the water exiting the nozzle?

A storage tank contains water to a height of 25m. The air above the water  inside the tank has a gauge pressure of 4.5 atm . How fast will the water flow out of a hole that is located at the bottom of the tank?

A metre long narrow bore held horizontally (and closed at one end) contains a 66 cm long mercury thread, which traps a 18 cm column of air. What happens if the tube is held vertically with the open end at the bottom ?

A garden hose having with an internal diameter of 1.7 cm is connected to a (stationary) lawn sprinkler that consists merely of an container with 23 holes, each 0.20 cm in diameter. If the water in the hose has a speed of 0.93 m/s, at what speed does it leave the sprinkler holes? m/s

Three liquids that will not mix are poured into a cylindrical container. The volumes and densities of the liquids are O.664 L, 3.39 g/cm3; 0.127 L, 1.24 g/cm3; and 0.494 L, 0.690 g/cm³. What is the force on the bottom of the container due to these liquids? One liter = 1L = 1000 cm3. (Ignore the contribution due to the atmosphere.) Number i 28.05408 Units N

A company needs to pump coconut oil (den: 924 kg/m^3) from the import truck to its holding tank 17 meters above the ground.  If the pump that is used is able to create 3 ATM of pressure, what will be the velocity of the oil as it enters the tank?