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jose francisco duque

jose francisco d.

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Multiple Choice 2 points The logical expressions to media queries in an external Cascading Style Sheet (CSS) file are as follows: @media screen and (min-width: 481px) { mobile { display: none; } In this case, _______ is the feature of the screen that is tested. @media screen .mobile min-width display

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In North America, avoiding eye contact results in negative messages and is often associated with deceit and dishonesty. Oa. False Ob. True

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Creutzfeldt Jacob Disease is caused by ? bacteria ? fungi ? viruses ? a prion

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Data was gathered to see if the distance (in miles) of an airplane flight could be used to predict the price of a ticket (in dollars). The following regression output was obtained. Regression Statistics Multiple R 0.5889 R Square 0.3468 Adjusted R Square 0.3184 Standard Error 48.7124 Observations 25 ANOVA df SS MS F Significance F Regression 1 28976.2925 28976.29254 12.2113 0.001954213 Residual 23 54576.7475 2372.902064 Total 24 83553.04 Coefficients Standard Error t Stat P-value Lower 95% Intercept 153.0677 18.0775 8.4673 1.59751E-08 115.6715897 Distance 0.0457 0.0131 3.4945 0.0020 0.0186 Interpret the intercept.

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b) A plano-convex spherical lens with a radius of curvature r = 10 mm and the axial thickness of 1.5 mm is placed behind the aperture stop as shown in the figure below. The refractive index of glass is 1.5168 (at a wavelength $\lambda$ = 0.588 µm). (i) Find the optimal distance between the aperture stop and the front plane surface of the lens for which the chief ray will exit the lens perpendicular to its back spherical surface. What types of aberrations will be corrected in this case? [2 marks] (ii) For this optimal stop position find the field curvature in the system. [1 mark] (iii) What is the maximum diameter of the aperture stop for which the lens is free from spherical aberration at a wavelength $\lambda$ = 0.588 µm. Hint: use the $\lambda$/4 Rayleigh criterion when comparing the difference in the optical path length for an ideal and spherical lens; also use a sag equation in the form $z = y^2/2r + (1+k) y^4/8r^3 + ...$ [3 marks] (iv) Calculate axial colour produced by this lens when imaging in white light. [1 mark] (v) Find the minimum f-number of the lens to avoid axial colour in the image assuming the Abbe number of glass is V = 64.2. [2 marks] Stop

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RR = (C + D) / m - MB

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Which of the following is caused by a virus? Group of answer choices genital warts syphilis chlamydia gonorrhea

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You are interested in understanding whether evolution by natural selection occurs for body length in a population of copperhead snakes in the Clemson Forest. You record the number of offspring produced by 100 copperhead mothers and measure the length of each mother which varies substantially. You find that the largest 20 copperhead mothers had 3 more offspring on average than the smallest 20 copperhead mothers. You record the length of all offspring in the next generation and find that the average population snake length increased by 10 centimeters compared to the previous generation! Think about the 4 postulates of Natural Selection. Based on your results, which of the following conclusions do you draw? * HINT: Don't assume any information that is not given in the question. For each postulate, ask yourself if there is sufficient information provided to make a conclusion! Natural selection has occurred but evolution has not Evolution has occurred but not necessarily by natural selection Neither natural selection nor evolution have occurred Evolution by natural selection has occurred

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When crime reduction efforts result in crime moving to areas surrounding the intervention site, this is known as: Group of answer choices Displacement Disparity Diffusion Deterrence

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Name: Total points: 10 1. A uniform beam in static is pinned at point A and a force F is acting at point C. Find the: a. Tension in the cable BD b. Reactions at point A Given: a = 6m; b = 4m; F = 10kN; $\theta$ = 30$^\circ$; weight of the beam = 100kgs (981 N) D A B O C a F b

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