Answered: 1) How many liters of a 12% salt…

1) How many liters of a 12% salt solution must be added to 10 liters of a 25% salt solution to get a 20% salt solution ?

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

5th Edition

ISBN:9781305084766

Author:Saeed Moaveni

Publisher:Saeed Moaveni

Chapter18: Mathematics In Engineering

Section: Chapter Questions

Problem 32P

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Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.

Question

1) How many liters of a 12% salt solution must be added to 10 liters of a 25% salt solution to get a 20% salt solution ?

2) The sides of a triangle measure 3m, 4m, and 5m. What is the smallest interior angle of this triangle in degrees ?

3) The ages of a certain population in a city is normally distributed with mean of 45 and standard deviation of 15. If the city has a population of 5000, how many would you expect aged 20 to 60?

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Sample problem 2/2 A particle moves along the x-axis with an initial velocity v, = 50 m/s at the origin when t = 0. For the first 4 seconds it has no acceleration, and thereafter it is acted on by a retarding force which gives it a constant acceleration a, = -10 m/s?. Calculate the velocity and the x-coordinate of the particle for the conditions of t = 8 s and t = 12 s and find the maximum positive x-coordinate reached by the particle. Solve the problem using the equations of constant acceleration 2- v + 2a(s - s,) or s-s, +t
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