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Download A Three Dimensional Model For Direct Laser Metal Powder by Labudovic, Kovalevic PDF

By Labudovic, Kovalevic

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If you go around a curve at constant speed, is this accelerated or nonaccelerated motion? If accelerated, what is the direction of the acceleration vector? 15. Will the acceleration be the same when a car rounds a sharp curve at 50 mph as it is if it rounds a gentle curve at the same speed? Explain. 16. 8 s? What would be the time for 1,500 m at this pace? 17. 8 km/h, how far will a car travel in 175 min? 18. Two cars go around the same curve. Car A has a speed of 30 mph, while car B has a speed of 60 mph.

In other words, the axes must be labeled so we know what the variables are. A graph without a label is meaningless. Also, since a graph shows how one variable depends on the other, by convention, the dependent variable is plotted on the vertical axis and the independent variable is plotted on the horizontal axis. 1 CONSTANT SPEED There are four graphs below, all representing an object with constant speed. Before reading the text below the graphs, look at them and see if you can figure out what the object is doing.

23 24 Questioning the Universe: Concepts in Physics Finally, there are the strong and weak nuclear forces. They do not directly affect our daily lives since they only act over nuclear or subnuclear dimensions, which are much, much smaller than atomic dimensions. They do affect us indirectly since they are responsible for holding the nucleus together (so we can have atoms) and for certain types of radioactive nuclear decays. They are also very important in powering the sun, which is the ultimate source of energy for us here on earth.

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