Ultimate Physics Study Guide - Questions & Answers

radio galaxies probably have jets that push material away from their nuclei and into surrounding lobes. astronomers think that most radio galaxies have
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it would take approximately years to receive light from a civilization on the opposite side of the galaxy. a. 100000 years. b. 10 yrs. c. 100 yrs. d. 1/4 of a year.
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describe how energy travels from the nuclear core of the sun to the atmosphere. in your answer, include the name of each layer and describe how energy moves through the layer.
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children in a tree house lift a small dog in a basket 4.75 mm up to their house. part a if it takes 221 jj of work to do this, what is the combined mass of the dog and basket?
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in 1986, a gargantuan iceberg broke away from the ross ice shelf in antarctica. it was approximately a rectangle 165 km long, 40.0 km wide, and 250 m thick. (a) what is the mass of this iceberg in kg, given that the density of ice is 917 kg/m3? 1513050 kg (b) how much heat transfer (in joules) is needed to melt it? j (c) how many years would it take sunlight alone to melt ice this thick, if the ice absorbs an average of 120 w/m2, 11.00 h per day?
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a slide projector needs to create a 99.0 cm -high image of a 2.00 cm -tall slide. the screen is 307 cm from the slide.you may want to review (page 960) .for help with math skills, you may want to review:rearrangement of equations involving multiplication and divisionfor general problem-solving tips and strategies for this topic, you may want to view a video tutor solution of using a lens to make an image.part awhat focal length does the lens need? assume that it is a thin lens.
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a sinusoidal wave is traveling along a rope. the oscillator generating the wave completes 40.0 cycles in 30.0 seconds. also, a given maximum travels 4.25-m along the rope in 10.0 seconds. what is the wavelength?
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a container holds gas molecules of mass m at a temperature t. a small probe inserted into the container measures the value of the x component of the velocity of the molecules. what is the average value of 1 2 2 x mv for these molecules
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a uniform meter stick of mass 24 g with two weights hanging from it is balanced on a knife edge at the 40 cm mark. a weight of mass 96 g hangs from the 9 cm mark. at which cm mark must the other weight of mass 96 g be located to keep the meter stick balanced?
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Refraction studes show that the Moho is depressed about 10 km beneath the center of the Hawaiian Islands. Assuming that this is the value of wo and that h=34 km, E= 70 GPa, v = 0.25. Pm Pw 2300 kg m-3, and g = 10 m s -2 determine the maximum bending stress in the lithosphere.
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a BTU is defined as the amount of energy required to raise the temperature of one lb of water by one degree celsius.T/F
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an airline employee tosses two suitcases in rapid succession, with a horizontal velocity of 7.2 ft/s, onto a 50-lb baggage carrier which is initially at rest. (a) knowing that the final velocity of the baggage carrier is 3.6 ft/s and that the first suitcase the employee tosses onto the carrier has a weight of 30 lb, determine the weight of the other suitcase. (b) what would be the final velocity of the carrier if the employee reverses the order in which he tosses the suitcases?
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what is the electrical potential difference needed to accelerate an electron from rest to a velocity of 1 x 106 m/s? (the mass of an electron is 9.1x10-31 kg and the charge on an electron is 1.6 x 10-19 c)
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. a pulley consists of a uniform disk with mass m and radius is r and is free to rotate around a frictionless axle through its center. a mass m is hung from a string wrapped around the pulley. if the string does not slip, what is the acceleration of m?
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Calculate the power of an electric bulb which consumes 2400 J in a minute
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If two vectors are perpendicular to each other, their cross product must be zero.a. Trueb. False
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Which type of eclipse makes the Sun appear in the form of a ring? A. total solar eclipse B. partial solar eclipse C. annular solar eclipse D. partial lunar eclipse E. total lunar eclipse
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a 3.50 kg object is attached by a thread of negligible mass, which passes over a frictionless pulley of negligible mass, to a 4.50 kg object. the objects are positioned so that they are the same height from the floor, and then released from rest. what is the speed of the objects when they are separated vertically by 1.00 m?
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a car is traveling at 30 km per hour. a bug hits the windscreen and goes splat. which object experiences the greater force?
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how would you characterize atmospheric conditions if the adiabatic lapse rate is steeper than the environmental lapse rate
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how fast would she have to be running for her race to appear to her to be only 91 yd long? give your answer in terms of c.
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a 57 g tennis ball is served at 45 m/s .if the ball started from rest, what impulse was applied to the ball by the racket?
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a man hits the end of a uniform steel railroad rail with a sledge hammer. how long does the sound wave take to travel 439 km through the rail, where a scientist detects it?
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a force a. is expressed in newtons. b. can cause an object to speed up, slow down, or change direction. c. is a push or a pull. d. all of the above
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