(a) an electron in a television tube travels the 12 cm distance from the grid to the screen at an average speed of 2.00 107m/s. how long does the trip take? s (b) an electron in a current-carrying wire travels at an average speed of 7.00 10-5 m/s. how long does it take to travel 12 cm?
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The material that keeps its new shape after it is stretched is called?
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Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".
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Asynthetic fiber used in manufacturing carpet has tensile strength that is normally distributed with mean 75.5 psi and standard deviation 3.5 psi. how is the standard deviation of the sample mean changed when the sample size is increased from n equals 8 to n equals 47
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(a) an electron in a television tube travels the 12 cm distance from the grid to the screen at an av...
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