Lesson_1.1_Homework

# Lesson_1.1_Homework - Lesson 1 Homework 1 In doing a...

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Lesson 1 Homework 1. In doing a calculation, you end up with a unit of m in the numerator and m/s 2 in the denominator. What are your final units? 2. (a) Convert 120 km/h to m/s (b) Convert 25 m/s to km/h 3. If x = C 1 + C 2 t where the unit of x is in meter and t is in seconds, what are the units of C 1 and C 2 ? 4. How many megameters are there in a kilometer? 5. Perform the following calculations using the correct number of significant figures: (i) 2 5 3 6.75 1.2 10 7.8 10 8.9 10 1750 × × × × × × . (ii) 2.2 × 10 -3 × 1200 × 3.56 × 10 5 . 6. If one atom of copper has a mass of 4.8 x 10 -26 kg. How many copper atoms are there in 20 g of copper? 7. A spherical metal shell has an inner diameter of 8.32 cm and an outer diameter of 10.52 cm. What is the volume of the metal that makes up the shell? 8. Distinguish between a vector quantity and a scalar quantity. How is speed different from velocity? How is the distance traveled by an object different from its displacement?

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