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jose luis luna

jose luis l.

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PHYS 2B W25 - Week 8 Discussion 1. A bat locates insects by emitting ultrasonic "chirps" and then listening for echoes from the bugs. Suppose a bat chirp has a frequency of 25 kHz. How fast would the bat have to fly, and in what direction, for you to just barely be able to hear the chirp at 20 kHz?

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All of the following are haploid cells EXCEPT one - which one is diploid? Select one: a. gametophytes b. mammalian gametes c. sperm d. sporophytes e. human egg cells

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Question 1 1 pts This list contains costs that various organizations incur; they fall into three categories: direct materials (DM), direct labor (DL), or overhead (OH). Classify each of these items as direct materials, direct labor, or overhead: Glue used to attach labels to bottles containing a patented medicine. Direct Materials Direct Labor Manufacturing Overhead

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A ball is thrown vertically into the air. Because of air resistence, its speed when it returns to its starting level compared to its initial speed

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Choose the correct response for the largest lymphoid organ in the body. A adenoids B thymus C spleen D tonsils

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Which of the types of receptors listed below is primarily used for detecting light rays under bright light conditions? amacrine cells rods olfactory hair cells cones ganglion neurons

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How can mechanical engineers contribute to the improvement of water conservation and management practices through the design and optimization of irrigation systems, water treatment plants, and distribution networks?

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6. An electric field is Find: $E(x, t) = 10 \cos(2\pi x - 3 \times 10^8 t) \text{ V/m}$ a) The amplitude of the field. b) The frequency of the wave. c) The wavelength of the wave. d) The wavenumber. e) The angular frequency. f) The wave velocity.

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Identify the type/color for each star: (3pts) \begin{tabular}{|c|c|c|} \hline STAR & COLOR & TYPE \\ \hline Star A & & \\ \hline Star B & & \\ \hline Star C & & \\ \hline Star D & & \\ \hline \end{tabular} 4. How is the color of a star related to its temperature? 5. Explain why a cooler star could appear brighter than a hotter star.

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Find the area and perimeter of the shaded areas of the figures below 1. A= P= Find the area and perimeter of the shaded areas of the figures below 1 A P 31

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