An ice with a mass of 0.9 kg is freely floating in water. The buoyant force exerted by water in Newton is nearest to,

The surface tension of water in air is approximately 0.0756 N/m. If the atmospheric pressure is 101 kPa (abs), what is the pressure inside a droplet 0.254 mm in diameter?

The average density of a human body is 980kg/cu.m. What percent of the human body will float in fresh water?

A cylinder weighs 150 lbf. Its cross-sectional area is 40 squares inches. When the cylinder stands vertically on one end, what pressure does the cylinder exert on the floor?

A solid steel ball has a weight of 50,000 dynes in air, 42,000 dynes in water and 36,000 dynes in an unknown liquid. What is the specific gravity of the unknown liquid?

A Pitot-static tube is placed into an air duct and the deflection of the gage is 1.6 inches of water. What is the velocity of the air in ft/s in the duct? Assume that the density of air is 0.0751b/cu.ft.

Given is an orifice with coefficient of velocity Cv = 0.6. If the head above the orifice is 4m, the actual velocity of the jet issuing from the orifice in m/s is nearest to,

A pump has an efficiency of 65%. It is driven by a 0.75 horsepower motor. The pump produces a pressure rise of 120 Pa in water. What is the required flow rate?

The pressure drop across a turbine is 200 kPa. The flow rate is 0.25 m³/min. What is most nearly the power output of the turbine?

The position of a vertical piston-cylinder device containing a gas has a mass of 60 kg and a cross-sectional area of 0.04 sq. m. The local atmospheric pressure is 0.97 bar, and the gravitational acceleration is 9.81 m/sec^2. Determine the pressure in bar inside the cylinder.

A piece of metal weighs 350N in air and when it is submerged completely in water it weighs 240N. Find the volume of the metal.

A 0.15 mdi meter pipe discharges into 0.10-m diameter pipe. Determine the velocity head (meter/s) in the 0.10-m diameter pipe if the pipes are carrying 0.12 m^3/s of kerosene.

A reservoir dam holds an 8 sq. km lake behind it. Just behind the dam, the lake is 12 m deep. What the water pressure at the base of the dam?

How much work is done when lifting 5 m³ of water to a height of 20m and forcing it into a main at a gauge pressure of 150 kPa?

Determine the atmospheric pressure in kPa at a location where the barometric pressure is 740 mm Hg and the gravitational acceleration is 9.81 m/sec². Assume the temperature of mercury to be 10 degree C at which its density is 13,570 kg/cu m.

In a hydraulic press, the small cylinder has a diameter of 8cm, while the larger piston has a diameter of 22cm. If a force of 800N is applied to the small piston, find force on the larger piston if there is no friction.

Two tubes are mounted to the roof of a car. One tube points to the front of the car while the other points to the rear. The tubes are connected to a manometer filled with a fluid of specific gravity 0.62. The density of air is approximately 1.202 kg/m³. When the height difference is 75mm, what is the cars speed?

Calculate the Reynolds number for water at 20°C flowing in an open channel. The water is flowing at a volumetric rate of 0.8 m³/s. The channel has a height of 1.2m and a width of 2.5m. At this temperature, water has a kinematic viscosity of 1.02 x 10-6 m²/s.

The Reynolds number of sphere falling in air is 1x10^6. If the sphere’s radius is 0.5m, what is most nearly its velocity? (ρair = 1.225 kg/m³, µair = 1.789 x 10^-5 Pa.s)

What is most nearly the friction factor for flow in a circular pipe where the Reynolds number is 1000?

The flow rate of water through a cast-iron pipe is 20m³/min. The diameter of the pipe is 0.3m and the coefficient of friction is f = 0.0173. What is most nearly the pressure drop over a 30m length of pipe?

The Poisson’s ratio for a homogeneous bar is 1/3. If the bar is subjected to a tensile load, the strain developed is 1/800. Find the change in volume per unit in the material. Air flows past a 50mm diameter sphere at 30 m/s. What is most nearly the drag force experienced by the sphere? The sphere has a coefficient of drag of 0.5. The density of the air is 1.225 kg/m³.

What is most nearly the minimum required force per unit width of the dam due to 3m of water acting on the vertical face of the dam to prevent the dam from sliding?

A jet of water is discharged through a 1-inch diameter orifice under a constant head of 2.1 ft. The jet is observed to pass through a point 2 ft downward and 4 ft away from the vena contracta. Compute the coefficient of velocity.

A reservoir dam holds an 8 sq. km lake behind it. Just behind the dam, the lake is 12m deep. What is the water pressure at the base of the dam?

A 0.15 m diameter pipe discharges into a 0.10 m-diameter pipe. Determine the velocity head (meter/s) in the 0.10 m-diameter pipe if the pipes are carrying 0.12 m³/s of kerosene.

A garden hose fills a 32 L wastebasket in 120 seconds. The opening at the end of the hose has radius of 1cm. How fast is the water traveling as it leaves the hose in m/s.

A sphere of radius 5 x 10 to the negative two cm and density of 1.1 gm/cc falls at a constant velocity through a liquid density of 1.00 gm/cc and viscosity of 1.00 poise. What is the velocity of the falling sphere in cm/sec?

Modern airplane design calls for a lift of about 1000N per sq.m. of wing area. Assume that air flow past the wing of an aircraft with streamline flow. If the velocity of flow past the lower wing surface is 100 m/s, what is the required velocity over the upper surface to give a lift of 1000N per sq. m? The density of air is 1.3 kg/cu.M.

A calibrated flask has a mass of 30g when empty, 81g when filled with water, and 68g when filled with an oil. Find the density of the oil.