Ultimate Physics Study Guide - Questions & Answers

what is the kinetic energy of a 60.0 g tennis ball traveling at 177.0 kilometers per hour? report your answer in joules (j).
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an object with a mass of 130kg is falling in air and experinces a force due to air resistance of 390 n what is the net force
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inside a motor, 27.8 a passes through a 250-turn circular loop that is 10.0 cm in radius. what is the magnetic field strength created at its center?
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how far from a converging lens with a focal length of 35 cm should an object be placed to produce a real image which is the same size as the object?
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the propeller of a world war ii fighter plane is 2.46 m in diameter. what is its angular velocity in radians per second if it spins at 1390 rev/min?
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why is the moment of inertia of a hoop that has a mass m and a radius r greater than the moment of inertia of a disk that has the same mass and radius? why is the moment of inertia of a spherical shell that has a mass m and a radius r greater than that of a solid sphere that has the same mass and radius?
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building a dam to produce hydro-electric power and create water storage is one way to take advantage of a common renewable resource. this produces much less pollution than a coal burning plant. water being let out of the dam also produces a lot of kinetic (movement) energy. however, building dams are not a perfect solution. what is the most likely problem related to dams?
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find the work done by the given force field for an object moving across a path that is the boundary of the region bounded by the upper semicircle centered at the origin with radius 2 and the x-axis. assume counterclockwise orientation. hint: use a theorem! you should be able to do this problem without too much computational work. group of answer choices 8 none of these 2 4
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a simple harmonic oscillator consists of a block of mass 4.2 kg and spring with spring constant 229 n/m on a frictionless horizontal surface. the block is moved from equilibrium and released from rest. if the block's maximum speed 13.6 m/s, calculate the amplitude a of the motion in meters.
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a type of cuckoo clock keeps time by having a mass bouncing on a spring, usually something cute like a cherub in a chair. what force constant (in n/m) is needed to produce a period of 0.340 s for a 0.0200 kg mass?
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a 7.00-kg mass is hung from the bottom end of a vertical spring fastened to an overhead beam. the object is set into vertical oscillations having a period of 2.60 seconds. what is the force constant of the spring?
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a system absorbs heat from the surroundings and has work done on it by the surroundings. what are the signs of qsystem and wsystem?
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the amplitude of a lightly damped oscillator decreases by 3.72% during each cycle. what percentage of the mechanical energy of the oscillator is lost in each cycle?
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the mass of an electron is 9.10939 x 10-31 kg. calculate the uncertainty in position if the velocity is 100.0 mi/h 1.0 %. ( 1 mi
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two stars that are close together are photographed through a telescope. the black and white film is equally sensitive to all colors. which situation would result in the most clearly separated images of the stars?
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a wing generates a lift a when moving through ea level air with a velocity u. how fast must the wing move through the air at an altitude of 10,000 with the same lift coefficient if it is to generate the same lift
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if 0.6 j of work are needed to stretch a spring from 12 cm to 14 cm and 1 j are needed to stretch it from 14 cm to 16 cm, what is the natural length of the spring?
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a 12 volt battery rated to produce 1 amp of current for 20 hours is connected to a 600 ohm load. how long should the battery retain an energy producing capability?
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because of wave refraction, erosion along an irregular coastline is greatest in the ; while deposition is greatest in the ; with the net result being that it straightens out the coastline. group of answer choices headlands; embayments embayments; headlands swash zone; breaker zone breaker zone; swash zone there is no erosion along a coast
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an increase in sound level from 30 db to 50 db requires an increase in sound intensity by a factor of:
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sea levels 18,000 years ago were approximately 100 m (330 ft) lower than they are today. question 53 options: true false
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newton's second law in 1 dimension: what magnitude net force is required to accelerate a 1200-kg car uniformly from 0 m/s to 27.0 m/s in 10.0 s?
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a car travels 50.0 m at a rate of 10.0 m/s, s. it then travels 200. m at a rate of 20.0 m/s, e. what is its average speed? its average velocity?
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the star antares has an apparent magnitude of 1.0 and the star procyon has an apparent magnitude of 0.4. which star appears brighter in the sky?
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