Angle Period (s) % Error 10° 1.66 7.26 20° 1.76 1.67 L 30° 1.78 0.55 40° 1.81 1.12 50° 1.82 1.68 Pendulum Length (L) = 0.8m gravity (g) 9.81 m/s^2 Small Angle Approximation Period: T=2π L = g 2pi* square root(0.8/9.81) = 1.79 s^2 60° 1.84 2.80

A house is advertised as having 1 420 square feet under its roof. What is area in square meters? (a) 4 660 m2(b) 132 m2 (c) 158m2 (d) 132 m2 (e) 10.2m1

Given: JA = 19.3 10A = 29.1° B: B₂ = 35.7, By = -48.6 (a) Calculate the x-components and y-components of Ã. A₂ = Ā: Ay = 4. (b) Calculate the length and direction of B. Assume angles are measured from the +x-axis with counter-clockwise as positive angles and clockwise as negative angles. B = 0. 0 OB= (c) Calculate the components of the vector sum of à + B = Č: C₁= 0c= Cy= 4. (d) Calculate the length and direction of C: Assume angles are measured from the +x-axis with counter-clockwise as positive angles and clockwise as negative angles. C= 0

nework @@ 2 W S Question 9 of 14 X mmand Your answer is partially correct. A person is standing at the edge of the water and looking out at the ocean (see figure). The height of the person's eyes above the water is h= 1.7 m, and the radius of the Earth is R = 6.38 x 106 m. (a) How far is it to the horizon? In other words, what is the distance d from the person's eyes to the horizon? (Note: At the horizon the angle between the line of sight and the radius of the earth is 90°.) (b) Express this distance in miles. (a) Number -0² (b) Number i 2.5 F2 # 3 E D 80 F3 C 3293.33 $ 4 R F Q F4 % 5 V T JAN 20 A 9 F5 Units G Units 6 B mi c F6 Y H & 7 N Horizon K F7 U 8 00 J DII F8 I M ( - O 9 F9 K 1/10 E ⠀ O ) V O D J F10 P 니 - command 4 V P F11 T { + option Ji) E F12 ? 11