a)

b)

Calculate the approximate force on a sail (in Newtons), given the horizontal velocity of the wind is 6.36 m/s parallel to its front surface and 3.89 m/s along its back surface. Take the density of air to be 1.29 kg/m3. The sail has a surface area of 23.9 m2. Note: A sail has lower air pressure on the front (leeward) side and more pressure on the rear (windward) side. Report answer to nearest whole number (no decimal). Determine the pressure drop due to the Bernoulli effect (in Pascals) as water goes into a 3-cm-diameter nozzle from a 9-cm-diameter fire hose while carrying a flow of 35 L/s? Take the density of water to be 998 kg/m. Report the final answer to the neatest whole number. Convert your final answer into kPa