Force per unit area

2. Force per unit area • Density • Buoyancy • Pressure • Power 16 of 30

3. Mass per unit volume • Density • Buoyancy • Pressure • Power 20 of 30

4. Upward force experienced by an object immersed in a fluid. • Density • Buoyancy • Pressure • Power 21 of 30

5. The buoyant force experienced by an object equals the weight of the fluid it displaces. • Archimedes’ principle • Pascal’s principle • Bernoulli’s Law • The ideal gas law 19 of 30

6. Changes in pressure are transmitted throughout a fluid. • Archimedes’ principle • Pascal’s principle • Bernoulli’s Law • The ideal gas law 20 of 30

7. A Pascal is equal to one • Gram/cubic centimeter • Joule/second • Newton/square meter • Joule/kilogram/Kelvin 20 of 30

8. The ______ is equal on each cylinder of a hydraulic lift. • Pressure • Force • Area • Displacement 21 of 30

9. Density equals: • m/V • F/A • rVg • aLoDT 21 of 30

10. The buoyant force equals the ____ of the displaced fluid • Density • Mass • Volume • Weight 21 of 30

11. The average kinetic energy of a particle in random thermal motion describes • Heat • Thermal Energy • Mechanical Energy • Temperature 21 of 30

12. 1.0 L of gas is initially at a temperature of -73oC and a pressure of 80 kPa. If the temperature is raised to 23oC with no change of volume the new pressure will be: • 27 kPa • 120 kPa • 160 kPa • 180 kPa 18 of 30

13. If a 24 kg object rests on a surface with an area of 0.08 m2 it exerts a pressure of: • 300 Pa • 3.0 kPa • 0.0033 Pa • 55 psi 21 of 30

14. Which formula could be used to solve a problem about hydraulic lifts? • P1V1/T1 = P2V2/T2 • DL=aLDT • P=Po + rhg • F1/A1=F2/A2 23 of 30

15. Which formula could be used to determine the pressure exerted by a fluid at a certain depth? • FB=rVg • r=m/V • P=Po+rhg • P=W/t 22 of 30

16. When heat is added to a substance at its melting point its temperature increases. • True • False 23 of 30

17. The increase in thermal energy needed to raise one unit of mass by one unit of temperature is called: • Heat of vaporization • Specific Heat • Coefficient of linear thermal expansion • Radiant Heat 19 of 30

18. 23 of 30 The first law of thermodynamics states that: • The internal energy of a system can be increased by doing work or adding heat. • The bouyant force equals the weight of fluid displaced. • The entropy of the universe is always increasing.

19. 23 of 30 The relationship between heat energy and temperature change is given by the formula: • Q=mcDT • DL=aLoDT • PV=nRT • P=W/t

20. 23 of 30 When a chocolate bar is cut in half its density is… • Halved • Unchanged • Doubled

21. 23 of 30 One kilogram of styrofoam has _____ density than one kilogram of iron • A smaller • A greater • The same

22. 22 of 30 If a loaf of bread is compressed, its _____ • Mass decreases • Volume increases • Density increases • None of these

23. 23 of 30 A wooden block has a mass of 800 g and a volume of 2 cm3. What is the block’s density? • 800 g/cm3 • 400 g/cm3 • 1600 g/cm3 • 0.4 g/cm3 • 0.025 cm3/g

24. 22 of 30 Water pressure is greatest against the _____ • Top of a submerged object • Bottom of a submerged object • Sides of a submerged object • None of these

25. 23 of 30 A completely submerged object always displaces an amount of fluid equal to its own: • Volume • Weight • Density • Mass

26. 22 of 30 One liter of water has a mass of: • 1 kg • 1 N • Both of these • Neither of these

27. 21 of 30 What is the buoyant force acting on a 34,000 N ship that is floating in the ocean? • Less than 34,000 N • 34,000 N • More than 34,000 N • Depends on the density of the sea water

28. 19 of 30 What is the weight of water which is displaced by a floating 34,000 N ship? • Less than 34,000 N • 34,000 N • More than 34,000 N • Depends on the ship’s shape • Depends on the density of the seawater

29. 21 of 30 An object that is partly or entirely immersed in a liquid is buoyed up by a force that is: • Equal to its own weight • Equal to the weight of the fluid it displaces. • Equal to the density of the fluid it is in. • Equal to the volume of the fluid it is in.

30. 22 of 30 A rock suspended by a weighing scale weighs 5.0 N out of water and 3.0 N when submerged in water. What is the buoyant force acting on the rock? • 5.0 N • 3.0 N • 2.0 N • 8.0 N • None of these

31. 21 of 30 Compared to an empty ship, the same ship loaded with styrofoam will float: • Higher in the water • Lower in the water • At the same level in the water.

32. 23 of 30 A block of styrofoam floats on a lake while a block of lead with equal volume lies submerged at the bottom of the lake. The buoyant force is greatest on the: • Styrofoam • Lead • Is the same for both

33. 22 of 30 A suction cup sticks to a wall. It is ____. • Pulled to the wall by the vacuum • Pushed to the wall by the atmosphere • Both of these • Neither of these