1. A speed of 7 mm/u,s is equal to ___________.
a) 7000 m/s
b) 70 m/s
c) 7 m/s
d) 0.07 m/s
2. A hockey puck, whose diameter is approximately 3 inches, is to be used to determine the value of π to three significant figures by carefully measuring its diameter and its circumference. For this calculation to be done properly, the measurements must be made to the nearest __________.
a) Hundredth of a mm
b) Tenth of a mm
c) mm
d) cm
e) in
3. What is the sum of 5.786∙103 m and 3.19∙104 m?
a) 6.02 ∙ 1023 m
b) 3.77 ∙ 104 m
c) 8.976 ∙ 103 m
d) 8.98 ∙ 103m
4. What is the number of carbon atoms in 0.5 nanomoles of carbon? One mole contains 6.02 ∙ 1023 atoms.
a) 3.2∙1014 atoms
b) 3.19∙1014 atoms
c) 3. ∙ 1014 atoms
d) 3.2 ∙ 1017 atoms
e) 3.19∙1017 atoms
f) 3. ∙ 1017 atoms