Question

Part Description Answer Chk History The number of significant digits in 1.0038 is: 1. 1 2. 2 3. 3 4. 4 5. 5 97% 2.91 pts # tries: 0 Show Details 20% try penalty Hints: 0,0 The number of significant digits in 1950 is: 1. 1 2. 2 3. 3 4. 4 5. 5 2.91 pts,97% B. # tries: 0 show Details 20% try penalty Hints: 0,0 The number of significant digits in 0.0038 is: 2.91 pts,97% 2. 2 3. 3 4. 4 5. 5 # tries: 0 Show Details 20% try penalty Hints: 0,0

Answer 1

(A) The number of significant digits in 10038 is 5 (All non zero digits are significant and all zeros between two nonzero digits are significant) (B) The number of significant digits in 1950 is 4 (zero to the right of the significant figures is significant) (C) The number of significant digits in 0.0038 is 2 because zero to the left of the significant figures are not significant (D) The number of significant digits in 1.250 E 4 i. e 1250 times 10^4 has 4 significant digits 1, 2, 5, 0 (H) The surface area of an object is 0.47 m^2 1 m = 100 cm 1 m^2 = (100)^2 cm^2 = 10^4 cm^2 therefore 0.47 m^2 = 0.47 times 10^4 cm^2 = 4700 cm^2 (4) is the correct option