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- (a) How high will water rise in a glass capillary tube with a 0.500-mm radius? (b) How much gravitational potential energy does the water gain? (c) Discuss possible sources of this energy.A certain hydraulic system is designed to exert a force 100 times as large as the one put into it. (a) What must be the ratio of the area of the slave cylinder to the area of the master cylinder? (b) What must be the ratio of their diameters? (c) By what factor is the distance through which the output force moves reduced relative to the distance through which the input force moves? Assume no losses to friction.4. A raft is made of 12 logs lashed together. Each is 30.5 cm in diameter and has a length of 6,00 m. How many people (whole number) can the raft hold before they start getting their feet wet, assuming the average person has a mass of 66.0 kg? Do not neglect the weight of the logs. Assume the density of wood is 600 kg/m3 People (whole number) 741 n na741 na
- 16 An oil has a kinematic viscosity of 1.25 x 10^-4 m^2/s and a specific gravity of 0.8. What is the dynamic viscosity of oil? * 0.18 kg/m-s O 0.125 kg/m-s O 0.1 kg/m-s O 1.0 kg/m-s 17 A gas occupies 0.2 cu. m. at 65.8 kPa & 20°C. Find its volume at STP. * 1.210 cu m 12.10 cu m O 0.121 cu mWhat is the density of a substance if 0.071 kg of it occupies 70 X 10-6 m³? a. 1004.29 kg/m3 b. 1034.29 kg/m3 c. 1014.29 kg/m3 d. 1024.29 kg/m3 e. None of the aboveA girl with a mass of 55.9 kg is wearing high heeled shoes and standing balanced on one foot. The heel is circular with a diameter of 1.9 cm. What is the pressure exerted by the heel on the horizontal floor? Acceleration due to gravity : 9.8 m/s² O A. 1933.13 kPa O B. 6298.19 kPa OC. 48.33 kPa D. 483.28 kPa O E. 193.31 Pa Clear my choice A man weighs 470.7 kg and is 198.8 cm tall. Calculate his Body Mass Index (BMI). BMI = (Mass in kg) / (Height in metres)2 O A. 119.10 O B. 0.01 OC. 476.40 OD. 1.19 O E. 11909.99 Clear my choice
- b. A solid cylindrical steel column is 4.0 m long and 9.0 cm in diameter. What will be its decrease in length when carrying a load of 80 000 kg? Y = 1.9 × 10" Pa.UU 2. Water is poured into a U-tube as shown in the A1 Ag Oil A1 A2 figure. The left arm of the tube has cross-sectional area A1 of 10.0 cm2, and the right arm has a cross- sectional area A2 of 5.00 cm2. 150 grams of oil are then poured into the right arm as shown. The two H. liquids do not mix. [Poit = 750 [Answer in kg m 3 significant figures] Water a) Determine the length of the oil column in the right arm of the U-tube. b) Determine the height (H) of the water column in the left arm above the water surface in the right arm?There are numbers of places in the body where the pressure is .A higher than atmospheric .B lower than atmospheric .C equal atmospheric .D All choices are not correct
- 81. ssm mmh A pressure difference of 1.8 × 10° Pa is needed to drive water (7 = 1.0 × 10-³ Pa · s) through a pipe whose radius is 5.1 × 10-³m. The volume flow rate of the water is 2.8 × 10-ª m³/s. What is the length of the pipe?The cabin pressure of a passenger jet cruising at high altitude (30000 ft) is about 1 atm. and the pressure outside is about 0.3 atm. What is the outward force acting on a door measuring 1 meter by 2 meters? A. 31857 lb B. 3096 lb C. 45510 lb D. 316 lbAn object floats in water, with 75% of its volume submerged. What is its approximate density?A. 250 kg/m3 B. 750 kg/m3C. 1000 kg/m3 D. 1250 kg/m3