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Consider a building 160 m high and 80 m wide. The velocity profile of the wind...
Superman is standing on top of a 160-m high building threw a villain upwards with an...
Superman is standing on top of a 160-m high building threw a villain upwards with an initial velocity of 50 m/s. Assume g= -9.80 m/s2. What is the speed, in m/s, of the villain after 6.5 seconds?
. max A small round object is tested in a 0.75-m diameter wind tunnel. The pressure...
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max A small round object is tested in a 0.75-m diameter wind tunnel. The pressure is uniform across sections 1 and 2. The upstream pressure is 30 mm H2O (gage), the downstream pressure is 15 mm H20 (gage), and the mean air speed is 12.5 m/s. The velocity profile at section 2 is linear; it varies from zero at the tunnel centerline to a maximum at the tunnel wall. V Calculate a) the mass flow rate in the wind...
A 4 m high noise barrier is to be installed at the side of a major road, and concern is raised about its stability...
A 4 m high noise barrier is to be installed at the side of a major road, and concern is raised about its stability in high winds. It is supported by concrete posts every 20 m, and the maximum base shear force that each post can withstand is 75 kN. Wind tunnel tests reveal that the maximum pressure coefficient, based on the mean wind velocity at the top of the barrier, on the windward face of the barrier is 1.5,...
-1. Consider a wind turbine of diameter 52 m. At a wind speed 16 m/s, the...
-1. Consider a wind turbine of diameter 52 m. At a wind speed 16 m/s, the wind turbine reaches is maximum power output of 850 kW. What is the coefficient of performance at this wind speed?
A ball is launched from the top of a building 80 m high at an angle...
A ball is launched from the top of a building 80 m high at an angle of above the horizontal with a speed of 63 in/s. How long does it take before the ball reaches its highest point? What is the maximum height of the ball above the ground? How long is the ball in the air before it hits the ground? How far does the ball travel horizontally before it hits the ground? What is the acceleration of the...
7marks t has a drag, F, given by F-a.w , where F is in newton's, W is the velocity of t with respect to the wat...
7marks t has a drag, F, given by F-a.w , where F is in newton's, W is the velocity of t with respect to the water (n m/5), and a -80 kg/m. The salil of the boat has a 10 m2 area and a drag coefficient of 1.2 when sailing before the wind (i.e., with a tailvi speed is 40 km/h. When saliling before the wind, calculate the Welodiy ofh boar s marke
7marks t has a drag, F, given...
An object with cross section A is shot horizontally across frictionless ice. Its initial velocity is v0x at t0=0s. Air resistance is not negligible. A 1.8 m wide, 1.5 m high, 1700 kg car with a drag c...
An object with cross section A is shot horizontally across frictionless ice. Its initial velocity is v0x at t0=0s. Air resistance is not negligible. A 1.8 m wide, 1.5 m high, 1700 kg car with a drag coefficient of 0.35 hits a very slick patch of ice while going 24 m/s . Air resistance is not negligible. If friction is neglected, how long will it take until the car's speed drops to 11 m/s ? To 5.0 m/s ?
The average wind speed is 6 m/s at a 10-m-high anemometer. Estimate the average power density...
The average wind speed is 6 m/s at a 10-m-high anemometer. Estimate the average power density in the wind at a height of 80 m. Assume Rayleigh statistics, a standard friction coefficient α = 1/7, and standard air density ρ = 1.225 kg/m3.
A ball is thrown from the top of a building 25 m high reaching a maximum...
A ball is thrown from the top of a building 25 m high reaching a maximum height of 50 m above the ground. The ball strikes the ground at a point 80 meters from the base of the building. what is the initial velocity of the ball. (magnitude and direction)
A trapezoidal masonry dam with vertical upstream face is 4.6 m high, 0.5m wide at the...
A trapezoidal masonry dam with vertical upstream face is 4.6 m high, 0.5m wide at the top and 3m wide at the base. Hydrostatic uplift varies from full hydrostatic pressure at the heel to zero at the toe. Find the depth of water if the pressure at the toe is twice the average pressure at the base. Wt. of masonry is 2,400 kg/m3 Find the height of water that could rise behind a rectangular masonry wall 2m thick and 5m...
Superman is standing on top of a 160-m high building threw a villain upwards with an initial velocity of 50 m/s. Assume g= -9.80 m/s2. What is the speed, in m/s, of the villain after 6.5 seconds?
.
max A small round object is tested in a 0.75-m diameter wind tunnel. The pressure is uniform across sections 1 and 2. The upstream pressure is 30 mm H2O (gage), the downstream pressure is 15 mm H20 (gage), and the mean air speed is 12.5 m/s. The velocity profile at section 2 is linear; it varies from zero at the tunnel centerline to a maximum at the tunnel wall. V Calculate a) the mass flow rate in the wind...
A 4 m high noise barrier is to be installed at the side of a major road, and concern is raised about its stability in high winds. It is supported by concrete posts every 20 m, and the maximum base shear force that each post can withstand is 75 kN. Wind tunnel tests reveal that the maximum pressure coefficient, based on the mean wind velocity at the top of the barrier, on the windward face of the barrier is 1.5,...
-1. Consider a wind turbine of diameter 52 m. At a wind speed 16 m/s, the wind turbine reaches is maximum power output of 850 kW. What is the coefficient of performance at this wind speed?
A ball is launched from the top of a building 80 m high at an angle of above the horizontal with a speed of 63 in/s. How long does it take before the ball reaches its highest point? What is the maximum height of the ball above the ground? How long is the ball in the air before it hits the ground? How far does the ball travel horizontally before it hits the ground? What is the acceleration of the...
7marks t has a drag, F, given by F-a.w , where F is in newton's, W is the velocity of t with respect to the water (n m/5), and a -80 kg/m. The salil of the boat has a 10 m2 area and a drag coefficient of 1.2 when sailing before the wind (i.e., with a tailvi speed is 40 km/h. When saliling before the wind, calculate the Welodiy ofh boar s marke
7marks t has a drag, F, given...
A trapezoidal masonry dam with vertical upstream face is 4.6 m high, 0.5m wide at the top and 3m wide at the base. Hydrostatic uplift varies from full hydrostatic pressure at the heel to zero at the toe. Find the depth of water if the pressure at the toe is twice the average pressure at the base. Wt. of masonry is 2,400 kg/m3 Find the height of water that could rise behind a rectangular masonry wall 2m thick and 5m...
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