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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
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A solid uniform disk of diameter 3.20 m and mass 42 kg rolls without slipping to the bottom of a hill, starting from rest. if the angular speed of the disk is 4.27 rad/s at the bottom, how high did it
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A series rlc circuit consists of a 92.0 ω resistor, a 0.160 h inductor, and a 35.0 μf capacitor. it is attached to a 120 v/60 hz power line. what is the peak current i at this frequency
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A roller-coaster car has a mass of 494 kg when fully loaded with passengers. (a) if the vehicle has a speed of 20.7 m/s at point a, what is the force in newtons exerted by the track on the car at this
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An rlc circuit has a resistance of 200 ???? and an inductance of 15 mh. its oscillation frequency is 7000 hz. at time t = 0 the current is 25 ma and there is no charge on the capacitor. after five com
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A 15 kg child is sitting on a playground teeter-totter, 1.5 m from the pivot. what is the magnitude of the minimum force, applied 0.3 m on the other side of the pivot that is needed to make the child
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A guitar string has a mass per length of 2.33×10−3kg/m and a fundamental frequency of 146.8 hz when it is under a tension of 82.4 n. the string breaks, and its owner has only a spare string of mass