(Solution) - 1 A speed of 7 mm u s is equal to a -(2025 Original AI-Free Solution)

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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 ? 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