Physics

2. 2 "However, we need to examine our environment, and ask problematic questions such as,"whose law?" Obviously, it's the law of the dominant class in that society (Study Guide,p. 7)Which class does the South African law, including the constitution, serve? Explain fully. (3)
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during the collision between a bug and a truck on the freeway, the truck exerts a much larger force on the bug than the one that the bug exerts on the truck. true or false
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An object of mass 6.10 kg has an acceleration a =(1.31 m/s2 )x^+(-0.673 m/s2 )y^.A)Three forces act on this object: F 1 , F 2 ,and F 3 .Given that F 1= (3.06 N ) x^ and F 2= (-1.62 N ) x^+ (1.73 N ) y^ , find F 3 .Express your answers using three significant figures separated by a comma.
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the sun is a star in the milky way galaxy. when viewed from the side, the galaxy looks like a disk that is approximately 100,000 light- years in diameter (a light-year is the distance light travels in one year) and about 1000 light-years thick (figure p25.8). what is the diameter and thickness of the milky way in meters? in kilometers? in miles?
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A person climbs to the top of the tallest mountain in South America. Since they are farther away from the center of the Earth, how does their weight compare to what it was at the base of the mountain?
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A uniform, 6 m long and 600-N beam, rests on two supports, as shown. The force exerted onthe b eam by the right support B is closest to:
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Which definition describes a scientific theory?OA. A claim, assumption, or method that is commonly thought to bebased on science but is not scientificB. The pursuit of knowledge about the natural world and theapplication of that knowledgeC. An explanation for a natural phenomenon that is based on factsand is supported by the results of many experimentsD. A method of carefully examining an idea, using a variety ofthought processes to construct and evaluate knowledge
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Four point masses 2kg, 4kg, 6kg and 8kg are placed at the corners of Square ABCD of 2cm long respectively. Find the Position of centre of mass of the system from the corner A.
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calculate the wavelengths of the components of the first line of the lyman series, taking the fine structure of the 2p level into account.
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Which of the following is the dimension of moment of inertia? (a) ML2 (b) MLT-1 (c) L2T 2 (d) L T-1
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Write an equation for the strength of the electrostatic force for two charges that are separated by 10 meters. Use the Gizmo to check your equation
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lighting flashes and you hear a thunder clap 4 seconds later. the velocity of sound is 340 m/s. how far away did the lighting strike
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A football player is running down the field with a momentum of 0. 567 kg*m/s. The player encounters a force that causes him to stop in 1. 4 seconds. What is the final momentum of the player?kg*m/sWhat is the change in momentum of the player? kg*m/sWhat is the impulse?N*sWhat is magnitude of the force that brings the player to a stop in this amount of time?
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A small plate has moved away from a large plate. It has moved150,000 meters in 30 million years. It is moving eastward. 1. What is the rate of motion of the small plate? Express your answer in mm/year. 2. Where would the plate be after 1. 5 million years? Express your answer in m
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A storage tank contains petrol to a height of 4. 7m. If the pressure at the base of the tank is "32. 3" kPa, determine the density of the petrol. Take the acceleration due to gravity to be 9. 81ms^-2.
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Four point masses 2kg, 4kg, 6kg and sky are placed at the corners of Square ABCD of 2cm long respectively. Find the position of centre of mass of the system from the corner A.
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hydroelectric power plants is a clean energy source. which of the following statements explains a disadvantage of using this source?
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A beam of light travels from air into a transparent material. The angle of incidence is 24 and the angle of refraction is 17
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A coil with 20 turns of wire is wrapped around a tube with a cross-sectional area of 1. 0 m2. A magnetic fieldis applied at a right angle at 0. 50 T. If the coil is pulled out of the magnetic field in 5 seconds, what emf isinduced in the coil?
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What is the difference between analog signal and digital signal. Explained in essay form.
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Armatures are wound to provide high voltage, high current, or some specific combination of voltage and current. which type of winding provides moderate voltage and moderate current
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A spring gun with a spring constant of 250N/m is compressed 5. Ocm. How fastwill a 0. 025kg dart move when it leaves the gun? 0. 13 m/s0. 50 m/s1. 5 m/s5. 0 m/s
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A uniform disk of radius 0.455 m0.455 m and unknown mass is constrained to rotate about a perpendicular axis through its center. a ring with the same mass as the disk is attached around the disk's rim. a tangential force of 0.227 n0.227 n applied at the rim causes an angular acceleration of 0.109 rad/s2.0.109 rad/s2. find the mass of the disk.
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Two vectors with a magnitude of 5 and 12 have a dot product equal to -6. Find the angle between the vectors to thenearest degree.
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