Numerade

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F4-29. Replace the loading system by an equivalent resultant force and couple moment acting at point O. 1 m 2 m 1.5 m B O x $$F_1 = \{-300i + 150j + 200k\} N$$ $$F_2 = \{-450k\} N$$ A y

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You decide to survey 100 adult Americans and find that 63 of workers indicate that they are midly satisfied with their job. Find the statistic. Round to two decimal places

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A researcher hypothesizes that pet therapy reduces anxiety. In this example: Question 8 options: a) Anxiety is the independent variable; pet therapy is the dependent variable. b) Pet therapy is the independent variable; anxiety is the dependent variable. c) Anxiety is the independent and dependent variable. d) Pet therapy is the independent and dependent variable.

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Tiffany characterizes salt crystals using Bragg X-ray diffraction. She uses a beam of X-rays with wavelength $\lambda = 0.329$ nm and observes a first-order maximum at a beam angle of $33^\circ$ with respect to the crystal surface.

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Q2. (Learning Outcome 3) For an electronics plant, the maximum number of fire incidents occurring every quarter was reported to be 5. Assume that the fire incidents occur independently every quarter. The probability of quartly fire inccidents is listed as below: No. of Fire Incidents per Quarter Probability 1 2 3 4 5 0.2 0.05 0.004 0.001 0.0001 a) What is the expected mean and standard deviation of quartly fire inccidents? b) What is the probability that at least 2 fire incidents will occur in next quarter given that no fire incidents occur in this quarter? c) To control the fire incident rate, a penalty of $50,000 per fire incident will be incurred when 3 or less fire incident occur in a quarter and a severe penalty of $300,000 in total will be incurred when 4 accidents occur and the highest penalty of $800,000 in total will be incurred when 5 accidents occur in a quarter. How much will be expected to pay for the penalty annually?

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21. Which of the following is likely to scratch glass? a. a file b. a gold ring c. a screwdriver d. a ski pole e. marble f. hexagonal carbon

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Water comprises how much of an infant’s total body content? Group of answer choices 60% to 65% 10% to 25% 30% to 50% 70% to 75%

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Problem 2: Image formation by refraction (10 pts.) An object in an aquarium (like a fish or a ruler) will appear closer than it is if you look at it head on, as shown in the figure. Consider an object at point $ P $ which is a distance of $ s=20 \mathrm{~cm} $ behind the edye of the aquarium tank. The tank is filled with watcr $ \left(n_{1}=1.33\right) $, and outside the tank is air. The object will "appear" to be at $ \mathbb{P}^{\prime} $, which is where the outgoing light ray appears to have come from (traced back as a straight line - the deshod lines in the figure). Consider a light ray coming from $ P $ which strikes the edye of the tank at a distance of $ l=1.0 \mathrm{~cm} $ away from the central axis. A. (2 pts.) What is $ \theta_{1} $ in the figure? B. ( $ 3 \mathrm{pts} $ ) What is $ \theta_{2} $ in the figure? C. (2 pts.) What is the distance $ S^{\prime} $ from the edge of the tank to the point $ P^{\prime} $ where the object "appears" to be? Hint: It should be less than $ 20 \mathrm{~cm} $. D. ( 3 pts.) If we are too far below the fish ( $ l $ is too large), then total internal reflection will prevent us frum secing the fish at all. Find the maximum distance $ l $ when we just lose sight of the fish.

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More and more bacteria are developing antibiotic resistance. Explain why this is becoming a major health care emergency.

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1. A particle moving along a straight line is subjected to a deceleration a = -2v³ m/s², where v is in m/s. If it has a velocity v = 8 m/s and a position of s = 10 m when t = 0, which equations is most recommended to solve the velocity and position when t = 4s? ? s - s? = v?t + 1/2at²; v² - v?² = 2a(s - s?) ? a ds = v dv; v dt = ds ? v² - v?² = 2a(s - s?); ds = v dt ? a dt = dv; s - s? = v?t + 1/2at²

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shawn b.