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A turbine has blades canted at 30° from horizontal. Sieam at a rate of 100 lbw/hr...
A 100 kg block is pushed up a frictionless incline 30 degrees above the horizontal by...
A 100 kg block is pushed up a frictionless incline 30 degrees above the horizontal by a force, at a constant speed of 5m/s. what is the minimum force required on the block, and what is the force of the ramp on the block. draw a free body diagram
F A large commercial wind turbine has a wing span (diameter) of 110m. On a still...
F A large commercial wind turbine has a wing span (diameter) of 110m. On a still summer day, the turbine was not rotating at all. A big dumb Canadian goose flew into the turbine, impacting one of the blades. The goose's velocity at the moment of impact was directed perpendicular to the blade, as in the picture to the right. The impact was at distance d 47.27 m from the center of rotation. The goose was in contact with the...
A 78.2 N wooden box is pushed with velocity 13.0 m/s across a flat, horizontal, concrete...
A 78.2 N wooden box is pushed with velocity 13.0 m/s across a flat, horizontal, concrete floor. A person pushes against the box at 30 degrees from horizontal, as shown in the figure. Assume: μk=μk=0.270 μs=μs=0.415 How much Force (Magnitude) is required to keep the box moving at constant velocity?
4: Refrigerant-134a at 1 MPa and 90°C is to be cooled to 1 MPa and 40°C...
4: Refrigerant-134a at 1 MPa and 90°C is to be cooled to 1 MPa and 40°C in a condenser by air. The air enters at 100 kPa and 27 C with a volume flow rate of 600 m3/min and leaves at 95 kPa and 65°C Determine the mass flow rate of the refrigerant. 5: The hot- water needs of a household are to be met by heating water at 55°F to 180°F by solar collector at a rate of 5...
4. (10 points] Waterenter the horizontal, circular cross-sectional, sudden-contraction nozzle sketched below at section (1) with...
4. (10 points] Waterenter the horizontal, circular cross-sectional, sudden-contraction nozzle sketched below at section (1) with a uniformly distributed velocity of 30 ft/s and a pressure of 80 nsi.The water exits from the nozzle into the atmosphere at section (2) where the uniformly distributed velocity is 100 ft/s. Determine the axial component of the anchoring force required to hold the contraction in place. Section (2) P2= 0 psi D1 3 in. Pi 80 psi V1 = 30 ft/s ー-スー. 100...
#8-#9 Four identical 100 N boxes are initially at rest on a rough horizontal surface. In...
#8-#9
Four identical 100 N boxes are initially at rest on a rough horizontal surface. In all cases, the coefficient of static friction between the box and the surface is 0.70 and the coefficient of kinetic friction is 0.25. Forces are applied as shown. 8. Circle the letter of the box (or boxes) subject to a frictional force of 25 N. A.C. P U 9. Circle the box(es) in equilibrium. A+B .70 25 N 50 N 12 Sa 100 N...
A 750 kg car slows to a stop from traveling southbound at 30 m/s over a...
A 750 kg car slows to a stop from traveling southbound at 30 m/s over a distance of 500 m. What was the acceleration needed to stop the car? How large was the force required to stop the car? Two cables are being used to pull a 100 kg sled on a frictionless surface. The first cable has a tension of 500 N in a direction 15o south of east. The other cable has a tension of 800 N in...
due in 30 min 8. (10 points) Picture taken from problem 19-21. The spool has a...
due in 30 min
8. (10 points) Picture taken from problem 19-21. The spool has a weight of 30 lb and a radius of gyration ko=0.45 ft. A cord is wrapped around the spool's inner hub and the end of the chord is subjected to a horizontal force P = 5 lb. Assume the spool rolls and slips. The coefficient of friction between the spool and the ground is uk = 0.1. Determine the spool's angular velocity in 4 s...
1. Water at 100°F is pumped from a sea-level reservoir to a tank open to the...
1. Water at 100°F is pumped from a sea-level reservoir to a tank open to the atmosphere through a new 14-in ID galvanized iron pipe as shown below. The minor loss coefficients in the suction and discharge piping are EK = 1.5 and Eduk = 7.2. Perform the following: a. derive the equation for the system curve as hy = a + b where he and a have units of feet and b has units of ft/gpm); b. plot the...
Lab 10: Pre-labs This pre-lab is worth 30 points of your final grade. Show your work...
Lab 10: Pre-labs This pre-lab is worth 30 points of your final grade. Show your work to get full credit. Each problem is worth 5 points. Problem 1: The angular velocity of flywheel decreases uniformly from 12000rev/min to 3000 rev/min in 8 sec. Find the angular acceleration and the number of revolutions made by the wheel in the 8 sec interval. How many more seconds are required for the wheel to come to rest? Problem 2: A uniform meter scale...
F A large commercial wind turbine has a wing span (diameter) of 110m. On a still summer day, the turbine was not rotating at all. A big dumb Canadian goose flew into the turbine, impacting one of the blades. The goose's velocity at the moment of impact was directed perpendicular to the blade, as in the picture to the right. The impact was at distance d 47.27 m from the center of rotation. The goose was in contact with the...
4: Refrigerant-134a at 1 MPa and 90°C is to be cooled to 1 MPa and 40°C in a condenser by air. The air enters at 100 kPa and 27 C with a volume flow rate of 600 m3/min and leaves at 95 kPa and 65°C Determine the mass flow rate of the refrigerant. 5: The hot- water needs of a household are to be met by heating water at 55°F to 180°F by solar collector at a rate of 5...
4. (10 points] Waterenter the horizontal, circular cross-sectional, sudden-contraction nozzle sketched below at section (1) with a uniformly distributed velocity of 30 ft/s and a pressure of 80 nsi.The water exits from the nozzle into the atmosphere at section (2) where the uniformly distributed velocity is 100 ft/s. Determine the axial component of the anchoring force required to hold the contraction in place. Section (2) P2= 0 psi D1 3 in. Pi 80 psi V1 = 30 ft/s ー-スー. 100...
#8-#9
Four identical 100 N boxes are initially at rest on a rough horizontal surface. In all cases, the coefficient of static friction between the box and the surface is 0.70 and the coefficient of kinetic friction is 0.25. Forces are applied as shown. 8. Circle the letter of the box (or boxes) subject to a frictional force of 25 N. A.C. P U 9. Circle the box(es) in equilibrium. A+B .70 25 N 50 N 12 Sa 100 N...
due in 30 min
8. (10 points) Picture taken from problem 19-21. The spool has a weight of 30 lb and a radius of gyration ko=0.45 ft. A cord is wrapped around the spool's inner hub and the end of the chord is subjected to a horizontal force P = 5 lb. Assume the spool rolls and slips. The coefficient of friction between the spool and the ground is uk = 0.1. Determine the spool's angular velocity in 4 s...
1. Water at 100°F is pumped from a sea-level reservoir to a tank open to the atmosphere through a new 14-in ID galvanized iron pipe as shown below. The minor loss coefficients in the suction and discharge piping are EK = 1.5 and Eduk = 7.2. Perform the following: a. derive the equation for the system curve as hy = a + b where he and a have units of feet and b has units of ft/gpm); b. plot the...
Lab 10: Pre-labs This pre-lab is worth 30 points of your final grade. Show your work to get full credit. Each problem is worth 5 points. Problem 1: The angular velocity of flywheel decreases uniformly from 12000rev/min to 3000 rev/min in 8 sec. Find the angular acceleration and the number of revolutions made by the wheel in the 8 sec interval. How many more seconds are required for the wheel to come to rest? Problem 2: A uniform meter scale...
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