1. What is the rotational speed of the second hand on a clock?
2. A child with a mass of 57 kg is riding on a merry-go-round. If the child has a speed of 3 m/s and is located 1.4 m from the center of the merry-go-round, what is the child's angular momentum?
3. Given that the carbon atom has a mass of 12 amu, how many carbon atoms are there in a diamond with a mass of 8 g?
4. A liter of water has a mass of 1 kg and the mass of a water molecule is 18 amu. How many molecules of water are there in 2 L of water?
5. An ideal gas has the following initial conditions: Vi = 490 cm3, Pi = 3 atm, and Ti = 100°C. What is its final temperature if the pressure is reduced to 1 atm and the volume expands to 1000 cm3?
6. An object has a mass of 300 kg and a volume of 0.4 m3.
What is its average density?
7. A cube with a mass of 49 g is made from a metal with a density of 6 g/cm3. What is the volume of the cube and the length of each edge?
8. Two barometers are made with water and mercury. If the mercury column is 17 in. tall, how tall is the water column?
9. A 450 cm3 block of aluminum (D = 2.7 g/cm3) is lowered carefully into a completely full beaker of water. What is the weight of the water, in newtons, that spills out of the beaker?
10. What can be said about the buoyant force on an object?