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A firefighter mounts the nozzle of his fire hose a distance 32.1 m away from the edge of a burning building so that it sprays from ground level at a 45° angle above the horizontal. After quenching a
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A cubic box with an edge of exactly 1 cm has a volume of: A. 10−9 m3 B. 10−6 m3 C. 10−3 m3 D. 103 m3 E. 106 m3
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An American Red Cross plane needs to drop emergency supplies to victims of a hurricane in a remote part of the world. The plane is traveling horizontally at 100.0 m/s at a height of 50.0 m above the g
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A sphere mass m1 and a block of mass m2 are connected by a light cord that passes over a pulley. The radius of the pulley is R, and the mass of the thin rim is M.. The block slides on a frictionless,
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Close, emotional bonds of affection that develop between infants and their caregivers defines a. separation anxiety. b. developmental norms. c. bonding. d. attachment.
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What would be the weight of a 59.1-kg astronaut on a planet with the same density as Earth and having twice Earth's radius? A) 580 N B) 290 N C) 1160 N D) 2320 N E) 1200 N
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A suction cup works by creating a vacuum between the rubber cup and surface its stuck to. if the total area of the rubber cups is 0.01 meters, how much weight can the suction cup support when stuck to
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When Esme is catching a softball in outfiled, her constant speed is 12 kilometers/seconds. What is her instantaneous speed when she has run halfway toward the ball?
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a feather has a mass of 0.5 g and the gravitational potential energy when the feather falls through a height og 1.60 m to hit the ground is 0.008 J, calculate the total amount of heat energy transferr
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Newton's second law state that a force on a drag racer is equal to the mass of the car times it's acceleration. one of the most important factors determining the cars acceleration is the tires on the
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A body moving along the x-axis is subject to a force repelling it from the origin, given by F = kx. (a) Find the potential energy function U(x) for the motion and write down the conservation of energ
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You work in a materials testing lab and your boss tells you to increase the temperature of a sample by 42.6 ∘c . the only thermometer you can find at your workbench reads in degrees fahrenheit.
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When the fan is turned on, it takes t = 3.4 s and a total of 13 revolutions to accelerate up to its full speed?
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Two cars collide at an icy intersection and stick together afterward. the first car has a mass of 1200 kg and is approaching at 8.00 m/s due south. the second car has a mass of 850 kg and is approachi
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The velocity in a certain flow field is given by the equation v=x2i^+x2z2j^+y3zk^ determine the expressions for the rectangular (a) x - component, (b) y - component and (c) z - component of accelerati
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The skier starts from rest at a and travels down the ramp. if friction and air resistance can be neglected, determine his speed vb when he reaches b. also, compute the distance s to where he strikes t
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Question part points submissions used hrw6 36-9p two waves of light in air, of wavelength 393. nm, are initially in phase. they then travel through plastic layers as shown in fig. 36-28, with l1 = 4.1
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Problem 5. a barbell consists of two small balls, each with mass m at the ends of a very low mass rod of length d. it is mounted on the end of a low-mass rigid rod of length b. the apparatus is set in
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Onsider an air solar collector that is 1 m wide and 2 m long and has a constant spacing of 3 cm between the glass cover and the collector plate. air flows at an average temperature of 45°c at a rate
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In the olympiad of 708 b.c., some athletes competing in the standing long jump used handheld weights called halteres to lengthen their jumps (fig. 9-56). the weights were swung up in front just before
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In a certain region the average horizontal component of earth's magnetic field is 16 μt, and the average inclination or "dip" is 78°. what is the corresponding magnitude of earth's magnetic field in
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If the mass of the child and sled is 35 kg , what is the magnitude of the average force you need to apply to stop the sled? use the concepts of impulse and momentum.
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If his height is measured to be 1.90 m by his doctor inside the ship, what height would a person watching this from earth measure for his height?
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Hat is the magnetic field in the middle of the capacitor plates at a distance d from the center, as a function of time t?
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Find the magnitude of the average frictional torque acting on the flywheel during the elapsed time of 5.00 minutes.
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Estimate the theoretical fracture strength (in mpa) of a brittle material if it is known that fracture occurs by the propagation of an elliptically-shaped surface crack of length 0.25 mm that has a ti
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Determine the towing force f required to move the car if the back brakes are locked, and the front wheels are free to roll.
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Consider the father pushing a playground merry-go-round in cnx_hsphysics_06_03_merrygo. he exerts a force of 250n250n at the edge of the merry-go-round, which has a 1.50m1.50m radius. how much t
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At a particular temperature, the equilibrium concentration of nh3 is found to be 0.231 m. given this information, determine the numerical value of k for this reaction, at this temperature.
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A race car, traveling at a constant speed of 50 m/s, drives around a circular track of radius 250 m. what angular acceleration does it experience?
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A particle of charge q = e moves in a circle of radius = 0.70 m with speed v = 2.750×107 m/s. treating the circular path as a current loop with constant current equal to its average current, find the
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A car with a mass of 1,200 kilograms is moving around a circular curve at a uniform velocity of 20 meters per second. The centripetal force on the car is 6,000 newtons. What is the radius of the curve
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A 3.00-m-long, 190-n, uniform rod at the zoo is held in a horizontal position by two ropes at its ends in
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A long cylinder of radius a is coaxial with the z axis. the interior of the cylinder has a non- uniform charge density given by
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A 28.0-kg block is resting on a flat horizontal table. on top of this block is resting a 18.0-kg block, to which a horizontal spring is attached, as the drawing illustrates. the spring constant of the
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Neo and Morpheus's masses have gained a velocity (not equal to zero) which means their momentum is now _____ .
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Which system allows for the movement of blood throughout the body? A. endocrine B. reproductive C. respiratory D. circulatory
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A baseball is dropped off the side of a cliff. It free-falls to the ground in 8 seconds. During the third second, the ball is traveling about ___ m/s.
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The power in an electrical circuit is given by the equation P=I^2R where I is the current flowing through the circuit and R is the resistance of the curcuit.1.what is the power in a circuit that has a
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Little Joey jumps into a pool on a cool fall morning. How can we describe the direction of energy transfer and temperature change between Joey and the water? A) Energy is transferred from Joey to the
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A body moving along the x-axis is subject to a force repelling it from the origin, given by F = kx. (a) Find the potential energy function U(x) for the motion and write down the conservation of energy
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A rocket is moving away from the solar system at a speed of 6.0x103 m/s. It fires its rocket engine, which ejects exhaust with a relative velocity of 3.0x103 m/s. The mass of the rocket at this time i
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When conducting scientific research, any information that is found must be analyzed to determine its validity. John believes that UFOs and extraterrestrial life exist. The excerpts below are an eyewit
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When conducting scientific research, any information that is found must be analyzed to determine its validity. Joel is a firm believer that exposure to cold weather can cause the common cold. He condu
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A circuit consists of a conducting movable bar and a lightbulb connected to two conducting rails as shown in the figure below. An external magnetic field is directed perpendicular to the plane of the
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The lower the percent of energy required for a machine to perform work, the more energy efficient it is. Please select the best answer from the choices provided T F
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In which one of the following locations can a person hear the echo of a sound? A. At least 33.2 meters behind the reflecting surface B. At least 16.6 meters in front of the reflecting surface C. Le
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Technician A says that the push rod connects to a pivoting component mounted at the top of the cylinder head called the camshaft. Technician B says that the push rod is used to transmit the up-and-dow
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While an object is moving at a constant 20m/s a 5 N force pushes the object to the left at the same time 5 N force is pushing the object to the right what will the objects velocity be after 10 seconds
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Which materials, including polystyrenes, can be recycled? polymers thermoplastics ceramics composites
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