Differentiate between raster and vector images.
What will be an ideal response?
Image files are either raster or vector.Raster images, orbitmaps, consist of a series of individual pixels. At the optimal resolution (based on image quality and size), the pixels are not visible. A bitmap contains a specific number of pixels measured as pixels per inch (ppi) and isresolution dependent, meaning that resizing the image affects the image quality.?Vector images, orvector graphics, consist of a group of separate drawing objects, such as shapes, curves, and lines, combined to create a single image. Vector images areresolution independent. You can resize a vector image with no loss of image quality. To use a vector image on the web, you must rasterize it by saving it in a bitmap file format.
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Radioactivity Basics: The isotope 
U is radioactive and decays in a series to 
Th. In this series, the particles ejected from the nucleus are
A. one alpha particle and three beta-minus particles. B. three alpha particles and one beta-minus particle. C. one alpha particle and four beta-minus particles. D. four alpha particle and one beta-minus particle. E. two alpha particles and two beta-minus particles.
Through how many degrees does a 33 rpm turntable rotate in
A) 35° B) 74° C) 63° D) 46°
Which of the following is an inherent disadvantage of radio telescopes?
A. Radio telescopes cannot detect visible light. B. They only work at night. C. Radio telescopes have low magnification. D. Radio signals are very weak, and their photons do not penetrate the atmosphere easily. E. The long wavelength of radio waves results in lower resolving power, compared to other telescopes of the same size.
A compound microscope is made with an objective lens ( = 0.90 cm) and an eyepiece ( = 1.1 cm). The lenses are separated by a distance of 10 cm. If an object is 1.0 cm in front of the objective lens, where will the final image of the eyepiece be located?
a. ?30 b. ?15 c. ?23 d. ?11 e. ?9