Math and Science Problems

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Maths and Science Challenge 2013 :

Maths and Science Challenge 2013 Science Refresher Questions

Science:

Science What is the outermost zone of the atmosphere that extends 400 to 500 miles from the Earth and contains molecules and ions of gases spraying out toward the void of space? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What theory describes the beginning of the universe that happened about 15 billion years ago from a singularity that exploded and scattered all the matter and energy in it? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What do you call the period of inactivity of some animal when body temperature is lowered? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What do you call that part of a flower that is tightly enclose and protect petals, stamens, and pistil from rain or insects. 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which state of matter has a density which is least affected by pressure? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Granting that the volume is the same, which mass will yield the highest density? (A) 850 g (B) 1.0 kg (C) 1100 g (D) 1.2 kg 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which location is farthest from Greenwich, England? (A) 10  E of prime meridian (B) 11  W of prime meridian (C) 180  E of prime meridian (D) 175  W of prime meridian 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which characteristic will you observe in sedimentary rocks? (A) folding (B) depression (C) breaking (D) layering 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Magma is a molten rock or fluid beneath the Earth that contains silica, gas bubbles and other minerals dissolved in it. When it erupts and reaches the surface of the Earth, it is now technically called________. 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which of the following processes is the best way to separate water and pebbles? (A) electrolysis (B) distillation (C) filtration (D) decantation 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which part of the earth is home to living organisms? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which type of cloud holds the most amount of water vapor? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which weather disturbance is observed in almost all parts of the earth? (A) floods (B) tornadoes (C) typhoons (D) hurricanes 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science The following is/are true about force except  I Force is a push or a pull II. Force changes the speed and the direction of moving objects III. Force causes a stationary object to start moving (A) I and II only (B) I and III only (C) All of the above (D) None of the above 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science The force of attraction between different kinds of molecules is known as (A) Adhesion (B) Cohesion (C) Magnetism (D) Friction 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science How much work is done when a man lifts a 50N block to a height of 2m? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science The method of heat transfer wherein a gas or a liquid moves from one place to another is called ______________ . 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which of the following is/are renewable energy source/s?  I Biomass II Nuclear III Hydroelectric IV Tidal   (A) I and IV (B) II and III (C) IV only (D) I,III and IV 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What is the main function of roots? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What is the proper path of the pollen in fertilizing the ovule? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which organ systems have an integrative function? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science If a couple wants to have a child, what is the probability of having a boy? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which of the following is the correct ordering of the parts of the digestive system the food must go through to be fully digested and absorbed by the body? (A) oral cavity, pharynx, esophagus, stomach, small intestine (B) pharynx, oral cavity, esophagus, stomach, small intestine (C) oral cavity, pharynx, stomach, esophagus, small intestine (D) oral cavity, pharynx, small intestine, esophagus, stomach (E) All of the above 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which molecule in the cell membrane is responsible for its selective permeability? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which compound is present in plants but is totally absent in animals? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Compared to bacteria, viruses are: (A) acellular (B) not evolving (C) harmful (D) dependent 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Bacteria exhibit what type of cell? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which animal phylum is characterized by a dorsal hollow nerve cord? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What symbiotic relationship is being demonstrated when the flea dwells and gets its nutrients from the dog? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which part of the water cycle involves the conversion of gaseous water to liquid water? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What is the main difference between eukaryotes and prokaryotes? (A) membrane-bounded organelles (B) capacity to divide and multiply (C) ability to assimilate inorganic compounds (D) capacity to evolve 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which organ system works on the ability of the body to recognize self from non-self? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science How many 1 cm 3 blocks of wood would you need to fill up a 2m 3 container if all its sides have exact measurements in cm (i.e. whole numbers)? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which of the following statements describe/s a chemical property? I. An iron nail is attracted to a magnet. II. Charcoal lighter fluid is ignited with a match. III. A bronze statue develops a green coating (patina) over time. IV. A block of wood floats on water.  (A) I and II (C) I and III (B) II and III (D) II and IV 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science A brand of vinegar is found to contain 5.4 % acetic acid by volume. What mass of acetic acid in grams, is contained in 500 ml of this vinegar if the density of acetic acid is 1.03 g/ml? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which of the following is/are true about the atom? I. The atom as a whole is electrically neutral. II. The atom is mostly empty space. III. In an atom, there exist as many electrons outside the nucleus as there are protons on the nucleus. IV. In neutral atoms, the magnitude of the protons is the same for different atoms, but the magnitude of electrons are not. (A) I only (B) I and II (C) I and III (D) I, II, and III 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science If A is the mass number of a neutral atom, and B is its atomic number, what formula should be used to get the number of electrons, C? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What would be the last term in the electronic configuration of Ni 28 ? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Given the atomic masses below, calculate the formula weight of Al 2 (SO 4 ) 3 . Atomic mass of Al = 27 u Atomic mass of S = 32.1 u Atomic mass of O = 16 u 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which of the following pairing of atomic properties follow the same trend in the periodic table? (A) atomic radius and nonmetallic character (B) atomic radius and electron affinity (C) ionization energy and electron affinity (D) ionization energy and nonmetallic character 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What is the oxidation state of Fe in Fe 3 O 4 ? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which of the following physical evidences may occur when a chemical reaction takes place? I. evolution of gas II. evolution or absorption of heat III. a color change IV. phase change (A) I and II (B) II and III (C) I, II, and III (D) I, II, III, and IV 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Determine the number of moles of O 2 that are required to react with 5 moles of C 2 H 6 (g) according to the equation: C 2 H 6 (g) + O 2 (g)  CO 2 (g) + H 2 0(g) 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Given: NH 3 (g) + F 2 (g)  N 2 F 4 (g) + HF (g) Which is the limiting reactant in the reaction of 4.00 g of NH 3 and 14.0 g of F 2 given the following molecular weights: NH 3 = 17.0 F 2 = 38.0 N 2 F 4 = 104 HF = 20.0 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Given: NH 3 (g) + F 2 (g)  N 2 F 4 (g) + HF (g) How many grams of the excess reagent were not used in the reaction? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which of the following is the correct balanced equation for the reaction of Ba 3 N 2 and H ­2 O? (A) Ba 3 N 2 (s) + 9H 2 O (l)  3Ba(OH) 2 ( aq ) + 2NH 3 (g) (B) Ba 3 N 2 (s) + 2H 2 O (l)  3Ba(OH) 2 ( aq ) + 2NH 3 (g) (C) Ba 3 N 2 (s) + 6H 2 O (l)  3Ba(OH) 2 ( aq ) + 2NH 3 (g) (D) Ba 3 N 2 (s) + 3H 2 O (l)  3Ba(OH) 2 ( aq ) + 2NH 3 (g) 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science A 128-g of dry ice (solid carbon dioxide) undergoes sublimation to CO 2 (g). What is the volume of this gas at STP? (atomic mass of C = 12, O = 16) 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science An unknown solution, X, was placed on a beaker. A second unknown solution, Y, was poured on that beaker to react with solution X. The temperature of the resulting solution after the reaction is lower than the reactants. What can be concluded from this experiment? (A)  H for this reaction is negative. (B) Combustion occurred. (C) The reaction is exothermic. (D) The reaction is endothermic. 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which of the following statements is/are true when an object A is made in contact with a hotter object B? I. The temperature of object A decreases while that of object B increases. II. Object A gains heat while object B loses heat. III. Thermal equilibrium will occur and both objects will have the same temperature.   (A) I and II (B) II and III (C) I and III (D) I, II, and III 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which has the highest [H + ] concentration? (A) an acid with a pH of 2.25 (B) an acid with a pH of 3.75 (C) an acid with a pOH of 12 (D) an acid with a pOH of 10 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Which of the following quantities is a vector quantity? (A) Distance (C) Time (B) Force (D) Mass 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science A plane flying at 120 m/s due North is blown by a 90 m/s strong wind due East. What is the resultant velocity of the plane? (A) 150 m/s 53.13º east of north (B) 150 m/s 53.13º north of east (C) 30 m/s 53.13º east of north (D) 30 m/s 53.13º north of east 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science A sailor in a small sailboat encounters shifting winds. She sails 3 km east, then km southeast, and an additional distance in an unknown direction. Her final position is 23 km directly east from her starting position. What is the magnitude and direction of the third leg of her journey? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Suppose the velocity, v, of a car is given by the expression v = 50 m/s + (0.5 m/s 3 ) t 2 Find the average acceleration between the time interval t = 1.0 s and t = 2.5 s. (A) 1.45 m/s 2 (B) 1.65 m/s 2 (C) 1.75 m/s 2 (D) 2.05 m/s 2 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Suppose the velocity, v, of a car is given by the expression v = 50 m/s + (0.5 m/s 3 ) t 2 What is the instantaneous acceleration of the car at t = 2.0 s? (A) 52 m/s 2 (C) 50 m/s 2 (B) 2.0 m/s 2 (D) Zero 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

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Science A book slipped from Nick’s hand and fell from the rooftop of a building that is 45 m high. His professor, who is 1.5 m tall is walking towards the building at a constant speed of 1.2 m/s. The book hit the professor’s head. How far was the professor from the building when the book slipped from Nick’s hand? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science Tiger Woods is targeting to shoot the golf ball in the hole that is 100 m far from his position. At what speed must he hit the ball so that it shoots in the hole after 3.96 s, if it was determined that the angle of the initial velocity is 37.5  ? (sin 37.5  = 0.609 and cos 37.5  = 0.793) 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science In a carnival ride, the passengers are traveling at constant speed in a circle of radius 4.5 m. They make one complete circle in 5s. What is their acceleration? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

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Science A moving car remains in uniform motion and is retarded by the force applied on the breaks. When the car suddenly stops, the passenger tends to move forward. What law is illustrated in this scenario? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

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Science A 45-kg woman is standing on a weighing scale in an elevator that is moving downward and decelerating at the rate of 2.4 m/s 2 . What will be the apparent weight of the woman as seen on the weighing scale? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

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Science A man is pulling a load with a rope making a 15  angle above the horizontal. If he makes 122.2 kJ of work, how much force must he exert to take the load home that is 650 m away from his starting position? (sin15  = 0.259 cos15  = 0.966) 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

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Science A tow truck is pulling a car weighing 12740 N. If the initial speed of the tractor is 15 m/s and its final speed is 35 m/s, what is the total work done by the tow truck? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

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Science Which of the following statements is true about the momentum and the kinetic energy of two bodies undergoing a collision? (A) In any collision, the momentum is conserved, but only in elastic collision is the total kinetic energy conserved. (B) In any collision, the momentum is conserved, but only in inelastic collision is the total kinetic energy conserved. (C) In any collision, both the momentum and total kinetic energy are conserved always. (D) In any collision, neither the momentum nor the total kinetic energy is conserved. 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

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Science A step-down transformer is designed to convert 220 V to 110 V to be supplied to the load. Which of the following secondary to primary turns ratio of the transformer is possible for this design if the voltage is directly proportional to the number of turns? (A) 1:2 (B) 2:1 (C) 1:4 (D) 4:1 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science If the speed of sound at room temperature is 344 m/s, what is the approximate ratio of the speed of light to that of sound? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

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Science What is the critical angle for a glass-air surface with index of refraction for glass n = 1.52? (A) sin -1 (1.0) (B) sin -1 (1.52) 2 (C) sin -1 (1.0/1.52) (D) sin -1 (1.52/1.0) 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What is the outermost zone of the atmosphere that extends 400 to 500 miles from the Earth and contains molecules and ions of gases spraying out toward the void of space? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What is the outermost zone of the atmosphere that extends 400 to 500 miles from the Earth and contains molecules and ions of gases spraying out toward the void of space? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What is the outermost zone of the atmosphere that extends 400 to 500 miles from the Earth and contains molecules and ions of gases spraying out toward the void of space? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What is the outermost zone of the atmosphere that extends 400 to 500 miles from the Earth and contains molecules and ions of gases spraying out toward the void of space? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What is the outermost zone of the atmosphere that extends 400 to 500 miles from the Earth and contains molecules and ions of gases spraying out toward the void of space? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

Science:

Science What is the outermost zone of the atmosphere that extends 400 to 500 miles from the Earth and contains molecules and ions of gases spraying out toward the void of space? 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP Answer:

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