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A horizontal uniform bar of mass 2.4 kg and length 3.0 m is hung horizontally on two vertical strings. string 1 is attached to the end of the bar, and string 2 is attached a distance 0.74 m from the o
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A beam of sound arrives perpendicular to your abdomen from the air. what's the percentage of sound energy density enters your body (regard as water)? (speed of sound in air and water is 340m/s and 1,5
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Two shuffleboard disks of equal mass, one orange and the other yellow, are involved in an elastic, glancing collision. the yellow disk is initially at rest and is struck by the orange disk moving with
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Cobwebs are popular decorations at Halloween time, but an experiment in which spiders were given psychoactive substances showed that it really affects their web spinning skills! The web below was spun
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If hubble's constant is actually half the value we believe it to be (70 km/(s mpc)), the universe would be
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A soccer player extends her lower leg in a kicking motion by exerting a force with the muscle above the knee in the front of her leg. she produces an angular acceleration of 27.5 rad/s2 and her lower
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A baseball is seen to pass upward by a window 20 m above the street with a vertical speed of 15 m/s. the ball was thrown from the street. (a) what was its initial speed? m/s (b) what altitude does it
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The sixth string of a guitar has standard tuning frequency of 82.41 hz. if the length of the vibrating string is 95.0 cm and its mass density is 8.90 g/m, what is the tension in the string at the stan
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If the coefficient of static friction is less than that found above, and if the coefficient of kinetic friction between the block and the table is .05, find the time it takes for the 6kg mass to fall
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Mike shoots a large marble (Marble A, mass: 0.05 kg) at a smaller marble (Marble B, mass: 0.03 kg) that is sitting still. Marble A was initially moving at a velocity of 0.6 m/s, but after the collisio
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What is the acceleration of an object if the velocity of am objects changes from 65 ms during a time interval of 12 s?
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A train travels 63 kilometers in 2 hours, and then 72 kilometers in 4 hours. What is its average speed?
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You are driving along a highway at 35.0 m/s when you hear the siren of a police car approaching you from behind and you perceive the frequency as 1,310 hz. you are relieved that he is in pursuit of a
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What is the self-inductance of a solenoid 30.0 cm long having 100 turns of wire and a cross-sectional area of 1.00 × 10-4 m2?
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A box is to be made out of a 12 by 20 piece of cardboard. squares of equal size will be cut out of each corner, and then the ends and sides will be folded up to form a box with an open top. find the l
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The left ventricle of a resting adult's heart pumps blood at a flow rate of 81.0 cm3/s, increasing its pressure by 110 mm Hg, its velocity from zero to 25.0 cm/s, and its height by 5.00 cm. (All numbe
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Different kinds of substances have different properties. Compare and contrast the electrical properties of salts, metals, and acids.
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A series circuit contains three 2 Ω resistors and a 6 Ω resistor. The current in each resistor is 4.0 A. What is the voltage of the battery in the circuit? 2.0 V 3.0 V 32 V 48 V
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Which one of the following statement does not accurately describe the diatonic scale as it corresponds to the setup on a piano keyboatd
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Justin notices a particular type of caterpillar feeds only on cottonwood trees in his neighborhood.In which way has Justin increased his scientific knowledge
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Charlie is investigating friction. She will use the same amount of force to push two wooden balls across two level surfaces. Then she will record her results in the table below. Which prediction will
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If the velocity of an abject changes from 65 m/s to m/s during a time interval of 12 s what is the acceleration of the object
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White light is incident on a material with an index of refraction for red light (n = 1.348), and an index of refraction for blue light (n = 1.449). the angle theta is 43.8 degrees. if the frequency of
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What is the maximum wavelength of light capable of removing an electron from a hydrogen atom in the energy states characterized by n = 1 and n = 4? (the rydberg constant for hydrogen is approximately
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Suppose you have a coffee mug with a circular cross section and vertical sides (uniform radius). What is its inside radius if it holds 400.0 g of coffee when filled to a depth of 6.00 cm? Assume coffe
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This problem explores the behavior of charge on conductors. we take as an example a long conducting rod suspended by insulating strings. assume that the rod is initially electrically neutral. for conv
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The relative humidity in a greenhouse at 45 °c is 92.0%. calculate the vapor pressure of water vapor in the greenhouse.
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The equilibrium constant is given for two of the reactions below. determine the value of the missing equilibrium constant. a. 3.5 x 10-5 b. 2.8 x 104 c. 8.1 d. 0.12 e. 89
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Of the charge q on a tiny sphere, a fraction α is to be transferred to a second, nearby sphere. the spheres can be treated as particles. (a) what value of α maximizes the magnitude f of the electros
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If the mass of the eyeball is 7.9 g, what is the effective spring constant of the musculature attached to the eyeball?
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Which of the following elements is most important for respiration? carbon oxygen hydrogen nitrogen
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For the instant represented, car a is rounding the circular curve at a constant speed of 26 mi/hr, while car b is slowing down at the rate of 4.2 mi/hr per second. determine the magnitude of the accel
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Consider a room that is initially at the outdoor temperature of 20oc. the room contains a 40-w lightbulb, a 110-w tv set, a 300-w refrigerator, and a 1200-w iron. assuming no heat transfer through the
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A point charge with charge q1 = 3.50 μc is held stationary at the origin. a second point charge with charge q2 = -4.10 μc moves from the point ( 0.160 m , 0) to the point ( 0.245 m , 0.240 m ). how
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An unknown immiscible liquid seeps into the bottom of an open oil tank. some measurements indicate that the depth of the unknown liquid is 1.5 m and the depth of the oil (specific weight ???? 8.5 kn/m
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A metal sphere with charge q=5.1 μc and radius r=2.8 cm is concentric with a larger metal sphere with charge q=12 μc and radius r=6.8 cm. (a) what is the magnitude of the potential difference betwee
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A hawk flies in a horizontal arc of radius 11.3 m at a constant speed of 5.7 m/s. find its centripetal acceleration. answer in units of m/s 2 .
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A ferris wheel has a radius of 5.0m and makes one revolution in 8.0 seconds. a person weighing 670n is sitting on one of the benches attached at the rim of the wheel. what is the apparent weight (the
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1 -A body of mass 1 kg has weight 10 N at a certain place. What is the weight of a 100 g, b 5 kg, c 50 g? 2 -The force of gravity on the Moon is said to be one-sixth of that on the Earth. What would a
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Find minimum value of the coefficient of static friction to prevent car from skidding: A car travels 25 m/s around a curve of radius 120 m on a level track
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A food product that contains 15% solids non-fat, 2% fat,and 83% water is to be pasteurised by heating to 95℃ by direct steam infusion using 90% quality steam at 15psig. After heating to 95℃, the p
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Which of these formulas represents 1 atom of sodium (Na) chemically combined with another element? A. PbS B. NaCl C. 2NaOH D. Na2H3IO6
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Which of the following statements are true of thermal energy and kinetic energy?Check all that apply.
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Which list accurately identifies the hierarchy of space from largest to smallest? Solar system, galaxy, planet, universe Galaxy, solar system, planet, moon Galaxy, solar system, universe, moon Solar s
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A satellite completes one revolution of a planet in almost exactly one hour. At the end of one hour, the satellite has traveled 2.0 × 107 meters and is only 10 meters away from its starting point. Wh
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HELP!! A reaction in which the reactants have more energy than the products is always a(n) _____ reaction.??? endothermic decomposition replacement exothermic
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A bird is flying due east, it distance from a tall building is given by x(t) = 28m +(12.4m/s)t + (0.045 m/s^3)t^3. what is the instantaneous velocity of the bird at t = 8s
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A basketball rolls off a deck that is 3.2 m from the pavement. The basketball lands 0.75 m from the edge of the deck. How fast was the basketball rolling? Seema lists the given values in a chart and d
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Which of the following states that all matter tends to "warp" space in its vicinity and that objects react to this warping by changing their paths?
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Light of wavelength lembda is incident nirmally on a diffration gratting for which the slit spacing is equal to 3 lembda. what is the sine of angle between the second order maximum and the normal
