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HW1 CIV

1. If the specific gravity of your body is 0.95, determine your body volume. 2. A 2.5 cm wide space between two horizontal plane surfaces is filled with an oil of viscosity of 0.03 Ns/m 2. What force is required to move a very thin plate of an area of 0.4 m 2 through the oil at a velocity of 0.1 m/s if: 1) the plate is 1.0 cm away from the lower plane surface; 2) the plate is 1.25 cm away from the lower plane surface?...Read more
Course Name: Fluid Mechanics Course Number: CIV 242 Instructor: Dr. Mohamed Elhakeem Due Date: 1-week after solution _______________________________________________________________________ Homework-1 1. If the specific gravity of your body is 0.95, determine your body volume. 2. A 2.5 cm wide space between two horizontal plane surfaces is filled with an oil of viscosity of 0.03 Ns/m 2 . What force is required to move a very thin plate of an area of 0.4 m 2 through the oil at a velocity of 0.1 m/s if: 1) the plate is 1.0 cm away from the lower plane surface; 2) the plate is 1.25 cm away from the lower plane surface? 3. What is the surface tension of mercury if the observed depression of the mercury in a 7 mm diameter tube was 1.0 mm? The specific gravity and wetting angle of mercury is 13.6 and135 o , respectively. 4. Two vessels are connected to a differential manometer using mercury (S.G. 13.56), the connecting tubing being filled with water (see figure beside). The higher-pressure vessel is 1.5 m lower in elevation than the other. Room temperature prevails. If the mercury reading is 100 mm, what is the pressure difference in m of water, and in kPa? (b) If carbon tetrachioride (S.G. = 1.59) were used instead of mercury, what would the manometer reading be for the same pressure difference? 5. What is the height of water y if the vacuum pressure of the air inside the tube is 10kPa (see the figure beside).
Course Name: Fluid Mechanics Course Number: CIV 242 Instructor: Dr. Mohamed Elhakeem Due Date: 1-week after solution _______________________________________________________________________ Homework-1 1. If the specific gravity of your body is 0.95, determine your body volume. 2. A 2.5 cm wide space between two horizontal plane surfaces is filled with an oil of viscosity of 0.03 Ns/m2. What force is required to move a very thin plate of an area of 0.4 m2 through the oil at a velocity of 0.1 m/s if: 1) the plate is 1.0 cm away from the lower plane surface; 2) the plate is 1.25 cm away from the lower plane surface? 3. What is the surface tension of mercury if the observed depression of the mercury in a 7 mm diameter tube was 1.0 mm? The specific gravity and wetting angle of mercury is 13.6 and135 o, respectively. 4. Two vessels are connected to a differential manometer using mercury (S.G. 13.56), the connecting tubing being filled with water (see figure beside). The higher-pressure vessel is 1.5 m lower in elevation than the other. Room temperature prevails. If the mercury reading is 100 mm, what is the pressure difference in m of water, and in kPa? (b) If carbon tetrachioride (S.G. = 1.59) were used instead of mercury, what would the manometer reading be for the same pressure difference? 5. What is the height of water y if the vacuum pressure of the air inside the tube is 10kPa (see the figure beside).
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