Question

In: Physics

8. An ice cube (formed by pure water) floats on salt water. The specific gravity of...

8. An ice cube (formed by pure water) floats on salt water. The specific gravity of salt water is 1024. Calculate the percent of the submerged volume.

9. A house has a roof with 100,000 N of weight and 12 m^2 of rectangular area. The pressure on the outside of the house is 0.95 atm. What minimum pressure is required inside the house to raise the roof?

10. A cylinder has a height of 1.80 meters and its circular caps have a diameter of 0.32 meters. The cylinder has a mass of 130 kg. Determine the density of the cylinder.

Expert Solution

(8) volume of immersed part of ice/Total Volume of ice=density of ice /density of sea water

-------------------------------(1)

density of ice can be taken as approximately equal to water density

specific gravity of sea water

so from equation(1)

--------------------------------------------------------------------------------------------------

(9) The minimum force required to raise the roof will be equal to the weifgt of roof i.e. 100000N

Let required inside pressure=P

force exerted by inside pressure to the roof-

pressure exerted from outside=0.95 atm=0.95x1.01x10⁵ =9.595x10⁴ pascal

Force exerted by outside pressure to the roof-

atm-m²

Now-

--------------------------------------------------------------------------------------------------------------------------------------------------

(10)volume of cylinder-

density-

genius_generous answered 1 year ago

A tube is placed vertically in a beaker of salt water with a specific gravity of...

A tube is placed vertically in a beaker of salt water with a specific gravity of 1.15. The interfacial tension between the air and the water is 32 mN/m and the contact angle is 30 degrees, calculate: a) Capillary pressure in psi if the tube diameter is 0.0001 cm. b) Capillary rise of water in tube. c) If the cap rock thickness is 2ft, do you think this will stop water migration? d) Radius in inches of the largest pore,...

12-11)A 38-g ice cube floats in 230 g of water in a 100-g copper cup; all...

12-11)A 38-g ice cube floats in 230 g of water in a 100-g copper cup; all are at a temperature of 0°C. A piece of lead at 96°C is dropped into the cup, and the final equilibrium temperature is 12°C. What is the mass of the lead? (The heat of fusion and specific heat of water are 3.33 105 J/kg and 4,186 J/kg · °C, respectively. The specific heat of lead and copper are 128 and 387 J/kg · °C, respectively.)...

Ice floats on water. For most other substances however, the solid sinks in the liquid.

Ice floats on water. For most other substances however, the solid sinks in the liquid. Classify each of these statements as true for water, or true for most other substances.

A tank contains 100kg of salt and 2000L of water. Pure water enters a tank at...

A tank contains 100kg of salt and 2000L of water. Pure water enters a tank at the rate 6L/min. The solution is mixed and drains from the tank at the rate 3L/min. ) Find the concentration(kg/L) of salt in the solution in the tank as time approaches infinity. (Assume your tank is large enough to hold all the solution.)

A 0.130-kg cube of ice (frozen water) is floating in glycerine. The gylcerine is in a...

A 0.130-kg cube of ice (frozen water) is floating in glycerine. The gylcerine is in a tall cylinder that has inside radius 3.20 cm . The level of the glycerine is well below the top of the cylinder. f the ice completely melts, by what distance does the height of liquid in the cylinder change? Express your answer with the appropriate units. Does the level of liquid rise or fall? That is, is the surface of the water above or...

A tank contains 60 kg of salt and 1000 L of water. Pure water enters a...

A tank contains 60 kg of salt and 1000 L of water. Pure water enters a tank at the rate 12 L/min. The solution is mixed and drains from the tank at the rate 6 L/min. (a) What is the amount of salt in the tank initially? amount = (kg) (b) Find the amount of salt in the tank after 3 hours. amount = (kg) (c) Find the concentration of salt in the solution in the tank as time approaches infinity. (Assume...

A triple-effect evaporator is a process that removes pure water from a salt water feed. The...

A triple-effect evaporator is a process that removes pure water from a salt water feed. The process consists of three units connected in series. The feed to the process contains 3.43 wt % NaCl in water. In the first effect, sufficient water is evaporated to concentrate the solution to 3.89 wt % NaCl. The second effect concentrates the solution further to 4.22 wt %, and the brine discharged from the process contains 5.02 wt % NaCl. a. Draw a diagram...

A tank contains 90 kg of salt and 2000 L of water: Pure water enters a...

A tank contains 90 kg of salt and 2000 L of water: Pure water enters a tank at the rate 8 L/min. The solution is mixed and drains from the tank at the rate 4 L/min. What is the amount of salt in the tank initially? Find the amount f salt in the tank after 4.5 hours. Find the concentration of salt in the solution in the tank as the time approaches infinity. (Assume your tank is large enough to...

a) A salt-water tank has pure water flowing into it at 5 L/min. The contents of...

a) A salt-water tank has pure water flowing into it at 5 L/min. The contents of the tank are kept thoroughly mixed, and the contents flow out at 5 L/min. Initially, the tank contains 1 kg of salt in 10L of water. How much salt will be in the tank after 20 minutes? Let ?? represent the amount of salt in the tank at time t and let ?? represent the volume of saltwater in the tank at time t....

An ice cube tray contains enough water at 29.0°C to make 20 ice cubes that each...

An ice cube tray contains enough water at 29.0°C to make 20 ice cubes that each has a mass of 30.0 g. The tray is placed in a freezer that uses as a refrigerant. The heat of vaporiztion of is 158 J/g. What mass of must be vaporized in the refrigeration cycle to convert all the water at 29.0°C to ice at –5.0°C? The heat capacities for and are 2.03 J/g·°C and 4.18 J/g·°C, respectively, and the enthalpy of fusion for ice is 6.02 kJ/mol....