A smoke plume is rising through an atrium at the rate of a metre per second. Calculate its momentum, if its density is 0.77 kg/m3.
Momentum (M) of smoke plume will be given as:
M=m*u
where m=mass flow rate of smoke plume=density×Volume flow
rate=0.77×1=0.77 kg/s per m3/s (assuming unit volume flow
rate)
u=Velocity of rise=1 m/s
Therefore,
M=0.77×1=0.77 kg*m/s per m3/s
A smoke plume is rising through an atrium at the rate of a metre per second....
What volume of the water per second can flow through a pipe 5.02 cm in diameter before turbulent flow will occur? Assume that density of the water is 1000 kg/m3 and viscosity of the water 0.972 mPas. Give your answer to two decimal places and you don't have to add unit cm3/s after your numerical value.
Water flow a rate of 0.5 m3 /s rising through a 50 o contracting pipe bend. The diameter at the bend entrance is 700 mm and at the exit 500 mm as shown in Figure 1. If the pressure at the entrance to the bend is 200 kN/m2 , determine the magnitude and direction of the force exerted by the fluid on the bend. The exit entrance of the bend is 0.4 m higher than the entrance and the bend...
Calcutate the mass of air passing through the circular area per second on this day (b) On another day, the wind speed is hailf that in (a). (0 Mass- (W) Calculate the power output of the wind turbine on the second day as a fraction of that on the first day Fraction a ball player bounces a ball of mass 0.60 kg. Its centre of mass moves down through a distance of 0.90 m, as shown in Fig. 1.1. Ignore...
Q 3 Ninety-eight per cent sulphuric acid is pumped at 4.5 tonne/hour through a 25 mm diameter pipe, 30 m long to a reservoir 12 m higher than the feed point. Calculate the pressure drop in the pipeline. It is given that the viscosity of acid is 25 mN.s/m2 and the density of acid is 1840 kg/m3 and the roughness of the pipe is 0.05mm. Recalculate the pressure drop if the roughness of the pipe is 0.5 mm. Q 3...
At a resting pulse rate of 77 beats per minute, the human heart typically pumps about 71 mL of blood per beat. Blood has a density of 1060 kg/m3. Circulating all of the blood in the body through the heart takes about 1 min for a person at rest. Approximately how much blood is in the body? volume of blood in body On average, what mass of blood does the heart pump with each heart beat? kg mass per heart...
All edges of a cube are expanding at a rate of 7 centimeters per second. (a) How fast is the volume changing when each edge is 1 centimeter(s)? m3/sec (b) How fast is the volume changing when each edge is 13 centimeters? cm m3/sec
what is the volume flow rate through the pipe? the water density is 1000 kg/m3. The pressure above the water in the tank is 250 kPa. The pressure of the atmosphere is 100 kPa. Air 250 kPa (sluten tank med "lock") 2.5 m 10 cm
A fan draws air from the atmosphere through a 0.3 m diameter round duct that has a smoothly rounded entrance. A differential manometer connected to an opening in the wall of the duct shows a vacuum pressure of 2.5 cm of water. The density of air is 1.22 kg/m3. (a) Determine the volume rate of air flow in the duct in cubic feet per second. (b) What is the power of the fan? Fan 0.30 m 2.5 cm Fan 0.30...
An iron wire has a cross-sectional area of 5.80 ✕ 10−6 m2. Carry out steps (a) through (e) to compute the drift speed of the conduction electrons in the wire. (a) How many kilograms are there in 1 mole of iron? kg/mol (b) Starting with the density of iron and the result of part (a), compute the molar density of iron (the number of moles of iron per cubic meter). mol/m3 (c) Calculate the number density of iron atoms using...
A spherical raindrop 1.9 mm in diameter falls through a vertical distance of 4150 m. Take the cross-sectional area of a raindrop = πr2, drag coefficient = 0.45, density of water to be 1000 kg/m3, and density of air to be 1.2 kg/m3. (a) Calculate the speed a spherical raindrop would achieve falling from 4150 m in the absence of air drag. _________ m/s (b) What would its speed be at the end of 4150 m when there is air...