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Q. A concave shaving mirror has a focal length of 95 cm. Calculate the image position of a cologne bottle placed in front of the mirror at a distance of 165 cm. Calculate the magnification of the image. Is the image real or virtual? Is the image inverted of upright? Draw a ray diagram to show where the image forms and how large it it with respect to the object.

Q. The rms speed of the molecules in 1.8 g of hydrogen gas is 1600 m/s. What is the total translational kinetic energy of the gas molecules?

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