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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
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It requires 350 joules to raise a certain amount of a substance from 10.0°C to 30.0°C. The specific heat of the substance is 1.2 J/g°C.
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Sound waves traveling through liquids tend to move faster than sound waves traveling through And, in general, sound waves move the fastest through 1st box : solid or gases 2nd box : gases, liquids, a
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Steven buys a pair of scissors instead of getting a haircut. He belives the scissors will last for a long time, while the haircut will only last a few weeks. In this case, scissors is a good, while th
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Which of the following is the best example of an object in free fall? A.A ball rolling across a floor B.An airplane landing C.A bird flying D.A person diving
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A 160.-kilogram space vehicle is traveling along a straight line at a constant speed of 800. meters per second. The magnitude of the net force on the space vehicle is (1) 0 N (3) 8.00 × 10^2 N (2) 1.
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A chemical is a representation of a compound that gives the number of atoms and types of atoms in that compound.
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An astronaut takes an iPod onto the space shuttle. An identical iPod remains on Earth. Which statement about the pull of Earth's gravity on the iPods is true? A.Earth's gravity has a stronger pull
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For an object to be in free fall: A.Earth's gravity must be the only force acting on it. B.the mass of the object must remain constant as it falls. C.it must be falling to Earth with constant
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Bob mixed 5 mg of sodium hydroxide pellets in 100 mL of water. Describe how the rate of the solution changes when he adds 1 mg more of sodium hydroxide pellets.
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Which of the following is true about gravity?Check all that apply. A.Two objects experience a greater gravitational pull when they are closer together. B.Gravity causes objects in free fall to f
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I had a little confusion with this question. Thanks if you can take out the time to help! (: Describe what would happen to both air temperature and soil temperature if cold weather were to pass throug
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What is the difference between angular speed and linear speed and how i can deduce the law of angular speed
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What does xylem do in a plant Transport food Transport water Prevent water loss Preform photosynthesis
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A car drives toward the right over the top of a hill, as shown below. Which arrow represents the centripetal acceleration? W X Y Z
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(8c32p7) suppose that a parallel-plate capacitor has circular plates with radius r = 70.0 mm and a plate separation of 5.7 mm. suppose also that a sinusoidal potential difference with a maximum value
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Ball is thrown eastward into the air from the origin (in the direction of the positive x-axis). the initial velocity is 60 i + 80 k, with speed measured in feet per second. the spin of the ball result
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A very long solenoid with a diameter of 3 cm and length 20 cm is wound with 500 turns of wire. when current in the wire is reduced from 10 a to zero in 0.2 s, what average emf is induced in the soleno
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A thick copper wire connected to a voltmeter surrounds a region of time-varying magnetic flux, and the voltmeter reads 13 volts. if instead of a single wire we use a coil of thick copper wire containi
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A stream of air at 37°c and 50% relative humidity flowing at a rate of 1250 kg/h is to be cooled to 15°c and dehumidified in a spray tower. the air is saturated as it emerges from the tower. liquid