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Physical Science
IDS 2403 Conceptual Phys Sci Test 2
50
Science
07/06/2013

Term
 An immersed body is buoyed up by a force equal to the weight of fluid it displaces; this is known as the: A.immersion B. flotation C. Archimedes Principle D. buoyancy
Definition
 C. Archimedes Principle
Term
 The volume of liquid or gas flowing is the same if tehre is a narowwing or widening of the flow. This is known as:   A. Archimedes Principle B. Boyle's Law C. buoyancy D. Bernoulli's Principle
Definition
 D. Bernoulli's Principle
Term
 When gas in a container is squeezed to half its volume and the temperature remains the same, tha gas pressure   A. quadruples B. doubles C. halves D. remains the same
Definition
 B. doubles
Term
 A dam is thicker at the bottom than at the top because   A. water is denser at deeper levels B. surface tension exists only on the surface of liquids C. water pressure is greater with increasing depth D. none of the above
Definition
 C. water pressure is greater with increasing depth
Term
 True or False:   In water, the deeper you swim, the greater the pressure because of the weight of the fluids directly above you.
Definition
 True
Term
 Objects weigh less when submerged under water because of the upward force exerted by the water that is exactly opposite in the direction of gravity. This upward force is referred to as: A. flotation B. pressure C. buoyancy D. neither
Definition
 C. buoyancy
Term
 True or False:   One cubic meter of air has a mass of 1.2 Kg, about 10 Neutons. If a mass of 1 cubic meter object is greater than 1.2 Kg, the object will float in air.
Definition
 False
Term
 When a chocolate bar is cut in half, its density is   A. halved B. unchanged C. doubled D. none of the above
Definition
 B. unchanged
Term
 Compared to a bar of pure gold, the density of a pure gold ring is   A. less B. the same C. more D. none of these
Definition
 B. the same
Term
 The air in this room has:   A. mass B. wight C. energy D. all of these
Definition
 D. all of these
Term
 When you touch a cold piece of ice with your fingers, energy flows:   A. from your finger to the ice B. from the ice to your finger C. actually both ways D. none of these
Definition
 A. from your finger to the ice
Term
 The boiling point of water using the Kelvin scale is   A. 100 degrees B. 212 degrees C. 373 degrees D. 273 degrees
Definition
 C. 373 degrees
Term
 The amount of heat needed to change the temperature of water by 1 degree Celcius is generated by:   A. 1 calorie B. 10 calories C. 100 calories D. 1,000 calories
Definition
 A. 1 calorie
Term
 The lowest temperature possible in nature is   A. 0 degrees C B. -273 degrees C C. 4 degrees K D. -100 degrees C
Definition
 B. -273 degrees C
Term
 The 1st Law of Thermodynamics states that   A. energy flows from an area of high concentration to an area of low concentration B. no system can reach absolute zero C. energy cannot be created or destroyed D. none of these
Definition
 C. energy cannot be created or destroyed
Term
 The 2nd Law of Thermodynamics states that A. energy flows from an area of high concentration to an area of low concentration B. no system can reach absolute zero C. energy cannot be created or destroyed D. none of these
Definition
 A. energy flows from an area of high concentration to an area of low concentration
Term
 The 3rd Law of Thermodynamics states that     A. energy flows from an area of high concentration to an area of low concentration B. no system can reach absolute zero C. energy cannot be created or destroyed D. none of these
Definition
 B. no system can reach absolute zero
Term
 The temperature reading of 15 degrees C is what temperature reading on the Kelvin scale?   A. 15 B. 288 C. 313 D. none of the above
Definition
 B. 288
Term
 True or False?     The three temperature scales, Fahrenheit, Celsius and Kelvin, have negative numbers.
Definition
 False
Term
 Which of the following normally warms up faster when heat is applied?   A. water B. iron C. glass D. wood
Definition
 B. iron
Term
 The radiant energy emitted by Earth is   A. conduction B. convection C. terrestrial radiation D. fusion
Definition
Term
 The transfer of thermal energy in a gas or liquid by means of currents in the heated fluid is called   A. conduction B. convection C. radiation D. fusion
Definition
 B. convection
Term
 The transfer of thermal energy by means of electromagnetic waves is called   A. conduction B. convection C. radiation D. fusion
Definition
Term
 The change of phase at the surface of a liquidas it passes to the gaseous phase is called   A. sublimation B. boiling C. freezing D. evaporation
Definition
 D. evaporation
Term
 A low temperature source meits what frequency of wavelength?   A. long B. short C. medium D. none of the above
Definition
Term
 The pupil of your eye is a net   A. emitter of radiant energy B. absorber of radiant energy C. neither of the above
Definition
Term
 A positive ion has more   A. electrons than neutrons B. electrons than protons C. neutrons than protons D. protons than electrons
Definition
 D. protons than electrons
Term
 A good heat conductor is a   A. poor insulator B. good insulator C. neither
Definition
 A. poor insulator
Term
 True or False     The good insulating properties of wool, fur and feathers are largely due to the air spaces they contain.
Definition
 True
Term
 True or False     If a surface absorbs more energy than it emits it is a net emitter.
Definition
 False
Term
 An example of radiant energy is:     A. steam B. vapor C. light D. conduction
Definition
 C. light
Term
 A physical change directly from a solid to a gas occurs in:   A. iron B. mercury C. dry ice D. helium
Definition
 C. dry ice
Term
 In an electrically neutral atom, teh number of protons in the nucleus is equal to the number of   A. electrons that surround the nucleus B. neutrons in the nucleus C. both of these D. neither of these
Definition
 A. electrons that surround the nucleus
Term
 True or False:     Protons and neutrons have a positive charge.
Definition
 False
Term
 Strip electrons from an atom and the atom becomes a   A. positive ion B. negative ion C. neutral ion D. neither
Definition
 A. positive ion
Term
 True or False     Temperature affects electrical resistance; the hotter the object, the greater the resistance.
Definition
 true
Term
 Electrical resistance is measured in   A. amperes B. conductivity C. current D. ohms
Definition
 D. ohms
Term
 A battery produces which kind of current   A. alternating current B. direct current
Definition
 B. direct current
Term
 A main difference between gravitational and electrical forces is that electrical forces   A. obey the inverse-square law B. are weaker C. attract D. repel or attract
Definition
 D. repel or attract
Term
 Ohm discovered that the amount of current in a circuit is directly proportional to the voltage established across the circuit and is inversely proportional to the   A. current B. electricity C. pressure D. resistance
Definition
 D. resistance
Term
 A positive charged ion is called   A. anode B. cathode C. cation D. anion
Definition
 C. cation
Term
 A negative charged ion is called:   A. anode B. cathode C. cation D. anion
Definition
 D. anion
Term
 True or False     Both positive and negative poles must exist in order to have a magnet.
Definition
 true
Term
 True or False   In most magnets, electron spin is the main cnotruibutor to magnetism.
Definition
 true
Term
 True or False     A pair of electrons spinning in the dame direction creates a weaker magnet.
Definition
 False
Term
 True or False     In a home air conditioner's motor, electical energy is the output and mechanical energy is the input.
Definition
 False
Term
 True or False     In a generator, mechanical energy is the input and electrical energy is the output.
Definition
 True
Term
 True or False     An alternator produces a direct current (DC).
Definition
 False
Term
 A device that transforms electrical energy into mechanical energy is a   A. generator B. motor C. magnet D. transformer
Definition
 B. motor
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