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timothy luna

timothy l.

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Question 2 Which of the following is chiral? trans-1,3-dimethylcyclohexane cis-1,4-dimethylcyclohexane cis-1-bromo-3-chlorocyclobutane cis-1,3-dimethylcyclohexane trans-1-bromo-3-chlorocyclobutane

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6. Figure 20.11 shows an experimental set-up that uses a beam balance to measure the strength of a magnetic field B. The beam balance is pivoted at its midpoint, and standard masses $m_1$ and $m_2$ are placed on the left and right pans respectively. The bottom part of the right pan is connected to a rectangular wire loop of N turns. A current I is flowing inside the loop in a clockwise direction, and three-quarters of the wire loop is in a uniform magnetic field with magnetic field strength B such that the beam balance is horizontal. Figure 20.11 When the direction of the magnetic field is reversed, the beam balance tilts to the left. Extra mass m has to be added to $m_2$ in order to balance the beam balance again. The magnitude of the resultant electromagnetic force, F, acting on the wire loop can be expressed as: $F = NBIL$ (a) Deduce the direction of the magnetic field in Figure 20.11. (b) Show that $m_1$ is equal to $(m_2 + \frac{F}{g})$, where g is the gravitational field strength. (c) Deduce the direction of the electromagnetic force F when the magnetic field is reversed. (d) Using the information given and answers in (a) and (b), show that the magnetic field strength B can be expressed as: $B = \frac{mg}{2NIL}$

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QUESTION 4 Consider the block diagram shown below. $G(s) + \frac{5}{\frac{s+2}{s}} \cdot 7 + F(s) \rightarrow + \frac{1}{s+1} X(s)$ $3$ What is the transfer function X(s)/F(s)? $\frac{7s+7}{6s^2+38s+31}$ $\frac{7s+7}{6s^2+32s+26}$ $\frac{6s+10}{6s^2+37s+52}$ $\frac{6s+5}{6s^2+38s+31}$ $\frac{6s+5}{6s^2+32s+26}$ $\frac{7s+14}{6s^2+37s+52}$ QUESTION 5 Solve the following differential equation in Matlab using ode45.m. Use time interval of 0.1 second. (Don't use options in ode45 to change teh tolerance.) $\frac{d\theta(t)}{dt} - cos\theta = sin t$ $\theta(0) = 0$ What is $\theta(t=4.1)$? 0.871 -0.212 1.44 1.28 2.01 3.19

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Maxwell and Smart are forming a partnership. Maxwell is investing a building that has a market value of $180,000. However, the building has a $56,000 note payable that will be assumed by the partnership. Smart is investing $120,000 cash. The balance of Maxwell's Capital account will be: Multiple Choice $180,000. $124,000. $56,000. $64,000. $60,000.

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Exercise 2 Which of the following is a soluble in water? A. NaCl B. AgCl C. CaCO$_3$ D. KOH

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A rushing river is d = 14 m wide with a current

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Differentiate the function.\ h(x) = (x - 2)(3x + 1)\ h'(x) =

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Question If $F(x) = -\frac{x^3}{5}$ is an antiderivative of $f(x)$, find $\int (f(x) + 5x^2) dx.$

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Question 3 of 6 Which matrix will perform the reflection operation about y-axis depicted in the picture below? (-x, y) T(x) X (x, y) x

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1 Write the EOM for this system 2 Take the LT of each EOM and collect terms in $X_i(s)$. Write each EOM in the form below, in order from $X_1(s)\to X_4(s)$. $X_1(s) \underline{\hspace{1cm}} + X_2(s) \underline{\hspace{1cm}} + X_3(s) \underline{\hspace{1cm}} + X_4(s) \underline{\hspace{1cm}} = \underline{\hspace{1cm}}$

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