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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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Baseballs pitched by a machine have a horizontal velocity of 30 meters/second. The machine accelerates the baseball from 0 meters/second to 30 meters/second in 0.5 seconds. If a baseball has a mass of
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Suppose a new limestone building has been constructed in a large city. The city located in a climate that is humid, rainy summers. The city also has several factories that cause air pollution. What mi
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Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events cant you explain?
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How are political, food industrial agricultural and health care related to each other and connected to dead zone
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Calculate the force of Earth’s gravity on a spacecraft 3.13 Earth radii above the Earth’s surface if its mass is 2198 kg.
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Potential energy is involved in each of these events. Match each event with its source of potential energy.
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Implement the following boolean function with an 8 to 1 line multiplexer and a single inverter F(A,B,C,D)=(2,3,5,6,8,9,12,14)
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The position of a dragonfly that is flying parallel to the ground is given as a function of time by r⃗ =[2.90m+(0.0900m/s2)t2]i^− (0.0150m/s3)t3j^. At what value of t does the velocity vector of t
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You play basketball in your driveway during the summer. By accident, you leave the basketball outside during the winter. You try to bounce it, but it would not bounce because it was partially deflated
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It takes 945./kjmol to break a nitrogen-nitrogen triple bond. calculate the maximum wavelength of light for which a nitrogen-nitrogen triple bond could be broken by absorbing a single photon.
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) Carbon dioxide as an ideal gas undergoes an isothermal process from 10 lbf/in2 to 50 lbf/in2. does the specific entropy increase, decrease, or stay constant? show your reasoning.
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A pulley system has an efficiency of 87.5 percent. how much of the rope must be pulled in if a force of 648 n is needed to lift a 150 kg desk 2.46 m? (disregard friction.)
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I'm kinda of stuck on the solution for this circuit. I can see that I can break this down into three loops, but before I do that, I need to know what the capacitors are charged to at t=0. It sure seem
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7. Ben (55 kg) is standing on very slippery ice when Junior (25 kg) bumps into him. Junior was moving at a speed of 8 m/s before the collision and Ben and Junior embrace after the collision. Find the
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If gravity did not affect the patIf gravity did not affect the path of a horizontally thrown ball, the ball would ____. a. go straight up c. fall straight down b. travel horizontally d. follow a curve
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A 5.00-kg object placed on a friction less, horizontal table is connected to a string that passes over a pulley and then is fastened to a hanging 9.00-kg object, as in Figure. Draw free-body diagrams
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A student has begun training for tryouts for lacrosse by running a two mile loop through her neighborhood every evening. Part of the run is a very steep hill. One evening, the stident is running down
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