Question: Pls answer all & show work Fall 2020 7. An aluminum bolt has diameter 1.701 cm at 21.0 C. To what temperature should it be

Pls answer all & show work

Fall 2020 7. An aluminum bolt has diameter 1.701 cm at 21.0 C. To what temperature should it be heated to increase its diameter to 1.708 cm? a for Aluminum = 25 X 10% 1/C 8. An image is created at a distance of 59.0 cm from a lens when an object is placed at 21.0 cm from that lens and on the opposite side. a) Calculate the focal length of the lens. V: $ 59.0 cm U - - 21. ocm 59 - - 21 F= 15. 4875 cm b) Calculate the magnification of the object. Be careful of signs!! m = x = +59 - 21 m= - 2.809 9. An object is shot straight upward from ground level at 94 m/s. a) (8 pts) Use conservation of energy to calculate how high it goes. b) (2 pts) The actual height attained will be less than that found in part (a) due to what force

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