{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

exam3-reviewsheet

# exam3-reviewsheet - SI Review Sheet – Exam 3 ...

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: SI Review Sheet – Exam 3  Matching:    1. 2. 3. 4. 5. 6. 7. 8. Wave      Mole      Density    Buoyant force  Pressure    Bernoulli effect  Temperature    Specific heat                                    a. Inversely proportional to volume  b. Directly proportional to volume  c. 1 cal/g K for liquid water  d. Pressure decreases with increased velocity  e. Contains 6.022*1023 molecules or atoms  f. 1.00 g/cm3 for liquid water  g. Propagates energy and momentum  h. Mass times gravity of a displaced fluid  True/False:    9. The Bernoulli principle is used to calculate the buoyant force on an object  submerged in a fluid.  10. Two objects are in thermal equilibrium if they have the same temperature.  11. Roofs flying off in hurricanes, the lift on airplane wings, and curveballs all relate to  the Bernoulli effect.  12. Mixtures adhere to the law of definite proportions because they always combine in a  fixed ratio.  13. Two moles of any compound always contain 12.044*1023 molecules.  14. The concept of “e pluribus unum” relates to the idea that many submicroscopic  particles can contribute to a macroscopic property like temperature or pressure.  15. An object floating in freshwater experiences the same buoyant force as it would  floating in saltwater.  16. The Kelvin scale is called an absolute temperature scale because it is based on the  behavior of water.  Multiple Choice:  17. The net force on a sunken object is always equal to:  a. the buoyant force on the object  b. the mass of water displaced by the object  c. the object’s weight minus the buoyant force  d. zero Newtons  e. none of the above  18. The fact that a fireball rises is due to the concept of:  a. thermal equilibrium  b. convection  c. the Bernoulli effect   d. conduction  19. You observe that your car tires are flatter when it is colder outside.  This is because:  a. pressure drops because there is less force over the same contact area  b. volume increases which causes pressure to drop  c. lower temperature means less pressure so tire volume decreases to          compensate  d. the average kinetic energy of the air particles outside increases  e. as the temperature decreases, the volume increases  SI Review Sheet – Exam 3    Problems:    Aluminum  Liquid butane  Density  2.7 g/cm3  0.60 g/cm3  Specific Heat  0.17 cal/gK  0.54 cal/gK    20. How many grams of water are in 1 mole of water?  How many molecules of water  are in 7.8 moles of water?  21. A 28 kg child sits on a tricycle.  If the pressure in each tire is 500 Pa, what is the  contact area of each tire?  22. In a closed container with a fixed volume, the temperature is increased from 24°C to  82°C.  What will happen to the pressure?  If the initial pressure is 0.7 atm, find the  final pressure.  23. 1 atm is equal to 101,325 Pascals.  How far down should a diver go underwater to  experience a pressure of 1 atm?   24. A 425 cm3 block of aluminum is submerged in water.  Find the buoyant force.  25. A 425 cm3 block of aluminum is submerged in liquid butane.  Find the net force.  26. Calculate the thermal equilibrium temperature of 10 g of aluminum at 30°C  submerged in 75 g of liquid butane at ‐22°C.  27. High speed winds in a hurricane cause the outside air pressure to drop from a  normal 1 atm to 0.96 atm.  If your roof has an area of 215 m2, what is the pressure  differential between the inside and the outside of the house?  What is the outward  force of the air inside the house on the roof?      Water  Ice  Aluminum  Specific Heat  1 cal/gK  0.5 cal/gK  0.17 cal/gK  Melting Point  0°C  Latent Heat of Melting  79.8 cal/g  327.5°C  76.7 cal/g    28. How much heat is required to completely melt a 17 g block of aluminum at 298 K?  29. How much heat is needed to raise the temperature of a 30 g block of ice from 263 K  to 283 K?  30. The speed of sound is 340 m/sec.  If the wavelength of a sound wave is 0.3 m, what  is the frequency?  31. The speed of light is 3.0*108 m/sec.  If the frequency of an electromagnetic wave is  4.3*1014 Hz, what is the wavelength in nanometers (10‐9 m)?    ...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online