At the beach, atmospheric pressure is 1025 mbar. You dive
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- Two pistons of a hydraulic lift have diameters of 4 m and 2 m. What is the force exerted by the larger piston when 100 N is placed on the smaller piston?arrow_forwardA small solid ball is released from rest while fully submerged in a liquid and then its kinetic energy is measured when it has moved 4.10 cm in the liquid (if it moves). The figure gives the results after many liquids are used: The kinetic energy K is plotted versus the liquid density plig, and Kg = 1.70 J sets the scale on the vertical axis. What is the volume of the ball in m3? K, 1 3. Pliq (g/cm³) K (J)arrow_forwardIn the figure below, the tank contains water and immiscible oil. What is h in cm if the density of the oil is 900 kg/m3 ?arrow_forward
- A reservoir of glycerin has a mass of 1,200 kg and a volume of 0.952 cu.m. Find its (a) weight (b) unit weight (c) mass density (d) specific gravity.arrow_forwardIf the specific volume is 0.00135 m3/kg and volume is 0.85 liters. Find the (a) Density (b) Mass, (c) Weight density, and (d) Relative density of the liquidarrow_forwardThe atmospheric pressure at sea level is 101 kPa. If at an elevation 10,000 ft above sea level atmospheric pressure measures 74 kPa. At what elevation (meters) does the pressure become 21 kPa?arrow_forward
- A Body Weighs 180N In Air And 100N When Immersed In Water, Find (A) Volume And (B) Specific Gravity Of The Body.arrow_forward2. A closed tank of a certain gas receives heat from being exposed to the sun. The bourdon pressure gauge initially reads 20 kpa but after some time it reads 30 kpa. Find the final absolute pressure of the gas insidearrow_forwardConsider a column of a planet's atmosphere. The planet's atmosphere is a compressible ideal gas at rest that obeys the polytropic relation Po %3D 3/2 Po 3/2 where pis pressure and pis density. Here, p, and P, are the values of pressure and density, respectively, at the planet's surface. Take z (altitude) to be positive upward with z=0 at the surface, take R to be the gas constant for the planet's atmosphere, and take g to be the downward acceleration due to gravity. a) Starting from hydrostatic balance and the polytropic relation above, derive an expression for the pressure field, p(z), in terms of the given parameters. Leave all parameters except the polytropic index as algebraic. b) Derive an expression for the density field, p(z), in terms of the given parameters. Leave all parameters except the polytropic index as algebraic. c) Derive an expression for the temperature field, T(z), in terms of the given parameters. Leave all parameters except the polytropic index as algebraic.arrow_forward
- As shown in the figure below, a piston-cylinder assembly contains 1 kg of water at T1=200° C and P1 = 1.5 bar holding the piston against the stops. The atmospheric pressure is 1 bar, and you can assume the piston's weight is negligible. The water is slowly cooled until the piston just begins to move downward in the cylinder. What is the pressure (P2), temperature (T2), and volume (V2) of water at this point? (°C), V2 = P2 = (m³) The cooling continues until water has entirely turned into saturated liquid. What is the pressure(P3) and temperature (T3), and volume (V3) of water at this point? (°C), V3 = P3 = (bar), T2 = (bar), T3 = Qtotal Calculate the total work done on the moving boundary of this system during the two processes. W total (kJ) Calculate the total heat transfer during the two processes. (kJ) On paper draw the P-v diagram for water going through the above processes. Show your detailed work on paper. hint: you must also find v1, u1, and u3. Patm = 1 bar Piston (m³) Stopsarrow_forwardA closed tank (of height 5 m) is partially filled with a liquid as shown. If the pressure of the air above the fluid is 2 bar, find the pressure at the bottom of the tank. Assume the density of the liquid to vary according to the following relation: p = 900 + 2 kg/m³ where y is the height from the base P= 2 bar 5 m 2 m Liquid Select one: O 2 12 O 2.15 O 2.18 O 2.5 A beaker half-filled with water is exposed to the atmosphere. If the pressure at points A, B and C as shown are Pa, Pb and Pc respectively, which one of the following will be the relation connecting the three? A. Pat A>Pat B=P at C B. Pat A>Pat B>P at C C.Pat Aarrow_forwardAn easy experiment to estimate the density of a body is to weigh it in air and water. Consider a body of unknown density and volume. You weighed it in air, finding a value of 100 N. Then, using a special scale imported from the United States, you weighed the object submerged in water, finding a value of 5.6 lbf. Based on these results, find the density and volume of the object. Remember that the scale measures the result of the balance of forces on the body (or the sum of the forces). Show this balance of forces (or force diagram) on the body during your solving. Express the result in units of the International System and the American System of Engineering, and show any unit conversion calculations using the conversion factor. Consider the densities of water and air equal to 1000 kg/m3 and 1.18 kg/m3, respectively.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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