A horizontal board of negligible thickness and area 2.0 m2 hangs from a spring scale that reads 80 N when a 4.0 m/s wind moves above the board. The air below the board is stationary. When the wind stops, the scale reads AnswerN. The density of air is 1.25 kg/m3 and treat the air as an ideal fluid

A 1.52 m wide by 2.03 m long mattress weighs 294 N. Find the pressure that the mattres exerts on the bed frame. Assume the entire lower surface of the mattress makes contact with the bed frame.   441 Pa   907 Pa   95.3 Pa   219 Pa

A 1.0 mL syringe has an inner diameter of 4.0 mm , a needle inner diameter of 0.24 mm , and a plunger pad diameter (where you place your finger) of 1.2 cm. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. Assume the liquid is an ideal fluid. a) What is the minimum force the nurse needs to apply to the syringe? Express your answer in newtons. b) The nurse empties the syringe in 2.2 s. What is the flow speed of the medicine through the needle? Express your answer in meters per second.

While taking a shower, you notice that the shower head is made up of 44 small round openings, each with a radius of 2.00 mm. You also determine that it takes 5.00 s for the shower to completely fill a 1.00-liter container you hold in the water stream. The water for the shower is pumped by a pump that is 5.50 m below the level of the shower head. The pump maintains an absolute pressure of 1.50 atm. Use g = 10 m/s2, and assume that 1 atmosphere is 1.0  105 Pa. (a) At what speed does the water emerge from the shower head? (b) What is the speed of the water in the pipe connected to the pump? (c) What is the cross-sectional area of the pipe connected to the pump?