80. Go When an 81.0-kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.00 X 10³ J. By how much does the potential energy of an 18.0-kg child increase when the child climbs a normal staircase to the second floor?

Consider a convex lens having a thickness d whose sides have radii of curvature R1 and R2. a. Find the 2x2 matrix describing this lensb. What is the change in focal length for the case where the two radii equal R and d =0.1R, compared to the case where the lens thickness is neglected?

A Moving to another question will save this response. Question 3 Measure the object using the proper number of significant figures. Instrument units are millimeter. m 10 O 8 mm O 8.0 mm O 7.99 mm O 7.90 mm A Moving to another question will save this response. MacBook Air 80 000 000 F2 F3 F4 F5 F6 %23 6. %24 # 3

A uniformly charged rod of length l with a non-linear charge density ) = Aox is laid along the x-axis as shown in the figure. There is an external electric field given by E = Ega²i where Eo is a constant. Find the total electric force on the rod. Select one: Εολο 4 Eodolî Εολο 3 E,lol² , 2