Exams & Certification

Problem (8) fft, fftshift, abs functions in MATLAB Consider the pulse function signal below: x(t) = stp_fn(t+1) – stp_fn(t-1) Generate a time variable from -4 to 4 [sec] in 0.001 [sec] step size. Draw x(t) with respect to time using plot. Convert the signal into the “Frequency Domain” signal (amplitude only): – Use fft to […]

How can you drop a raw egg onto a concrete floor without cracking it? The Correct Answer and Explanation is: The key to dropping a raw egg onto a concrete floor without cracking it lies in controlling the impact force. An egg’s shell is fragile and can break under even moderate impact because of its

12 Stretch Your Thinking Look at the division problem 112 / 0.056. Without solving, how many zeros will be in the quotient? How do you know? The Correct Answer and Explanation is: When dividing 112 by 0.056, we need to first consider the decimal places involved. The problem asks how many zeros will be in

Energy is stored long-term in the bonds of _ and used short-term to perform work from a(n) _ molecule. a. ATP: glucose b. an anabolic molecule : catabolic molecule c. glucose : ATP d. a catabolic molecule : anabolic molecule The Correct Answer and Explanation is: The correct answer is: c. glucose : ATP Explanation:

The density of acetonitrile (CH3CN)(CH3CN) is 0.786 g/mLg/mL, and the density of methanol (CH3OH)(CH3OH) is 0.791 g/mLg/mL. A solution is made by dissolving 21.5 mLmL CH3OHCH3OH in 98.8 mLmL CH3CNCH3CN. 1. What is the mole fraction of methanol in the solution? 2. What is the molality of the solution? Assuming CH3OHCH3OH is the solute and

For each compound, determine the direction of bond polarity: Leave the box blank for nonpolar bond: Br-Br H-CL F-CH3 Answer Bank The Correct Answer and Explanation is: Let’s break down each compound: So, in summary: This analysis is based on the electronegativity differences between the atoms involved in the bonds.

‘Where is the tangent function undefined? Choose the correct answer below: Xis an even multiple of 2 Xis an odd multiple of x} {x: xis an even multiple of z} Xis an odd multiple of 2}’ The Correct Answer and Explanation is: The tangent function is undefined when the cosine of the angle is equal

6) Find the Greatest Common Divisor of 35, 60, and 75 by the List Method, Factor Tree Division, and Prime Factors Method. 7) Find the Least Common Multiple of 60 and 75 using either the Dividing by Prime Factors Method or the Formula. The Correct Answer and Explanation is: 6) Finding the Greatest Common Divisor

A buffer is prepared by mixing hypochlorous acid (HClO) and sodium hypochlorite (NaClO). If a strong base, such as NaOH, is added to this buffer, which buffer component neutralizes the additional hydroxide ions (OH?)? ClO? HClO Write a balanced chemical equation for the reaction of the selected buffer component and the hydroxide ion (OH?). Do

The combustion reaction of hexane is: Type numbers in the boxes_ 10 points 19 02(9) 4 6 CO2(g) C6H14(l) 7 HzO() The heat of combustion of hexane is -4163 kJ/mol. Given the following information, calculate the heat of formation of hexane_ AH? ; (CO_(g)) ~393.5 kJ/mol AH? (H,O()) -285.8 kJ/mol kJ/mol The Correct Answer and