Living Science (Second Edition) Unit Test 2 8ʳ Making use of electricity S2 Science Test Unit 8ġ Making use of electricity Name:____________________________ ΰʳ ʳ ʳ α Time and Marks Class: ____________________________ Part A: 35 min / 100 marks Date: ____________________________ Parts A & B: 45 min / 120 marks Note: ʳ 1 Attempt ALL questions. 2 Write your answers in the spaces provided on the Answer Sheets. ʳ Part A (Level 1) A True or false questions (5 marks‚ 1 mark each) Study
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of nutrient agar with the bacteria that was exposed to UV light without the lid on the plate. Each quadrant represents a 10 sec exposure to the bacteria increasing to 40 secs. Serratia Marcescens is a gram negative rod shaped bacteria‚ containing the red pigment called prodigiosin. After the initial streaking of the 3 plates with Serratia Marcescens there were no visible differences. Two of the three plates were exposed to UV light‚ the experimental plate was exposed
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by a simple experiment. This requires that the part be swung about any axis (other than one that passes through its CG) parallel to that about which the moment is sought and its period of pendular oscillation measured. Figure 1 shows a part of connecting rod suspended on a knife-edge pivot at ZZ and rotated through a small angle θ. Its weight force W acts as its CG has a component W sin θ perpendicular to the radius r from the pivot to the CG. From rotational form of Newton’s equation: TZZ=IZZ∝
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problem 261 A steel rod with a cross-sectional area of 0.25 in2 is stretched between two fixed points. The tensile load at 70°F is 1200 lb. What will be the stress at 0°F? At what temperature will the stress be zero? Assume α = 6.5 × 10-6 in/(in·°F) and E = 29 × 106 psi. Solution 261 For the stress at 0°C: answer For the temperature that causes zero stress: answer problem 262 A steel rod is stretched between two rigid walls and carries a tensile load of 5000 N at 20°C. If the
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American Meteorologist Society issued a bulletin endorsing the lightning protection requirements embodied in the National Fire Protection Association Standard 780. Stating‚ “It is now well established that properly installed and maintained lightning rod based protection systems significantly decrease lightning damage.” The only true way to protect a structure from a direct lightning strike is with a lightning protection system. A lightning protection system‚ with proper installation can save lives
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Republic of the Philippines Ilocos Sur Polytechnic State College South Cluster Campus Tagudin‚ Ilocos Sur This research entitled “Cow Manure: Mosquito Repellent Rod” was conducted by: Ace Bryall Cornel Dharsinero Sabandal Jocelyn Janerol Mae Apple Monis Liezel Saydoquen Leslie Otanes Marlou Cabalbag Real Mae Dayacus Rhea Joy Fabro Angelica Gabriel And have approved and checked by: Rodolfo Cassanova Jr.
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The Function of the Human Eye Inarguably‚ the human eye is one of the most complex human organs in the body. The eye aids in almost every activity that people participate in (excluding pin the tail on the donkey). Scientists can only guess at the probability in evolution of the eye being formed; there are so many variables that a close number would be incalculable. The eye is an extraordinary part of the human body; most people agree that is the most important sensory organ. The eye sends messages
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life. But he’s okay.” They all jump into one of the Helicopters and are surprised to see Oren and Ty inside. Hi fives all around. Rod: “Man Oren I thought you might be in somebody’s trunk pissin’ on yourself.” At the prison they all look at the surveillance tape of the attempt on Ben’s life and how brave he was. Ty looks at Rod and tells him‚ “You taught him well cousin.” Rod reply‚ “Damn I didn’t teach him how to bust somebody’s head with a cafeteria tray though. I just want to see my boy.” They stand
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densities to the known densities on the data table and record the results. IV. Data- Substances Mass Volume Calculated Density Cork .15g .3mL .5g/mL Marble 3.85g 1mL 3.85g/mL Gold rod 8.6g 1mL 8.6g/mL Copper rod 9.05g 1mL 9.05g/mL White rod 1.15g 1mL 1.15g/mL Matte gray rod 1.5g 1mL 1.5g/mL Matte silver
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Experiment 6 Experiment 6 Some Properties of Charge Introduction: Electrical phenomena were studied extensively during the eighteenth century by scientists and amateurs alike including Benjamin Franklin. Among Franklin’s achievements were contributions to the understanding of electrical behavior beyond his famous (and dangerous) work with lightning. During this time‚ there was a certain social prestige attached to anyone who undertook such studies‚ and much of what passed for
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